{"id":174858,"date":"2026-08-10T12:25:58","date_gmt":"2026-08-10T12:25:58","guid":{"rendered":"https:\/\/pabau.com\/?p=174858"},"modified":"2026-08-17T12:09:17","modified_gmt":"2026-08-17T12:09:17","slug":"cpt-code-21199","status":"publish","type":"post","link":"https:\/\/pabau.com\/de\/procedure-codes\/cpt-code-21199\/","title":{"rendered":"CPT code 21199: Osteotomy, mandible, segmental with genioglossus advancement"},"content":{"rendered":"\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"MedicalWebPage\",\"headline\":\"CPT code 21199: Osteotomy, mandible, segmental with genioglossus advancement\",\"description\":\"CPT code 21199 (osteotomy, mandible, segmental with genioglossus advancement) billing reference covering ICD-10 pairings, modifiers, 2026 Medicare fee schedule, medical necessity, and documentation.\",\"url\":\"https:\/\/pabau.com\/procedure-codes\/cpt-code-21199\/\",\"audience\":{\"@type\":\"MedicalAudience\",\"audienceType\":\"Clinician\"},\"reviewedBy\":{\"@type\":\"Person\",\"name\":\"Dr Vanja Kitanova\",\"jobTitle\":\"Medical Reviewer\",\"affiliation\":{\"@type\":\"Organization\",\"name\":\"Pabau\"},\"knowsAbout\":[\"Medical Coding\",\"Clinical Documentation\",\"Healthcare Billing\",\"Clinical Safety\"],\"sameAs\":\"https:\/\/pabau.com\/blog\/author\/vanja\/\"},\"datePublished\":\"2026-08-08\",\"dateModified\":\"2026-08-10\"}<\/script>\n\n\n        <div id=\"key_takeaways\">\n            <div class=\"header\">\n                                    <img decoding=\"async\" src=\"https:\/\/pabau.com\/wp-content\/uploads\/2025\/12\/Key-Takeaways-Icon.svg\" alt=\"Key takeaways\" height=\"42\" width=\"42\">\n                                <h3>Key takeaways<\/h3>\n            <\/div>\n            <div class=\"list\">\n                                                            <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#3D3D46\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p>CPT code 21199 describes a segmental mandibular osteotomy with genioglossus advancement, used mainly to treat obstructive sleep apnea (OSA).<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#3D3D46\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p>G47.33 is the primary ICD-10 pairing, and payers want polysomnography results plus documented CPAP failure before they approve the claim.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#3D3D46\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p>The 90-day global period bundles most post-operative care, so a separately identifiable service inside that window needs modifier -24 or -79.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#3D3D46\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p>Practice management software like Pabau tracks authorization status, attaches operative documentation, and helps surgical practices cut CPT 21199 denials.<\/p>\n                        <\/div>\n                                                <\/div>\n        <\/div>\n    \n\n\n<p class=\"wp-block-paragraph\">CPT code 21199 is defined by the <a href=\"https:\/\/www.ama-assn.org\/practice-management\/cpt\/cpt-code-set-overview\" target=\"_blank\" rel=\"nofollow noopener\">American Medical Association (AMA)<\/a> as: Osteotomy, mandible, segmental; with genioglossus advancement. It sits in the Musculoskeletal System section of the CPT codebook, under the Head subsection.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The surgery repositions a segment of the mandible to pull the genioglossus muscle forward. That enlarges the upper airway and reduces soft-tissue collapse during sleep.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">One line in the operative note decides the code. If it does not name the genioglossus advancement, the claim belongs to CPT 21198 instead. Payers also treat this surgery as a late-stage option. The sleep study and the CPAP compliance record carry as much weight as the operative report.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"CPT Coding Pitfalls Every Medical Practice Faces\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/vbvV5okdXKg?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 id=\"h-procedure-description-genioglossus-advancement-surgery\" class=\"wp-block-heading\">Procedure description: Genioglossus advancement surgery<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The genioglossus is the primary tongue muscle. In patients with obstructive sleep apnea, it collapses against the posterior pharyngeal wall during sleep and blocks airflow. Genioglossus advancement (GA) moves the muscle&#8217;s attachment point on the mandible forward, so the tongue base stays clear of the airway.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">GA does not reposition the entire jaw. That larger movement belongs to a different orthognathic code.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">An oral and maxillofacial surgeon (OMFS) performs the procedure under general anesthesia. Some centers run it jointly with an ENT specialist, and it is often combined with other OSA surgeries. That combination decides how the co-surgery modifiers below apply.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The usual companions are hyoid myotomy.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Indication:<\/strong> Moderate-to-severe obstructive sleep apnea with retroglossic obstruction, documented by sleep study and upper airway imaging<\/li>\n\n\n\n<li><strong>Specialty:<\/strong> Oral and maxillofacial surgery; sleep surgery<\/li>\n\n\n\n<li><strong>Setting:<\/strong> Hospital inpatient or outpatient surgical center<\/li>\n\n\n\n<li><strong>Anesthesia:<\/strong> General<\/li>\n\n\n\n<li><strong>Recovery:<\/strong> Typically 2-4 weeks, with a 90-day global period<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Practice management software like Pabau keeps pre-authorization tracking, operative note attachment.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/cdn.pabau.com\/cdn\/attachments\/pulse\/content-engine\/billing_codes\/cpt-code-21199\/fully-integrated-with-pabau-billing.webp\" alt=\"Fully integrated with Pabau billing\"\/><figcaption class=\"wp-element-caption\"><em>Pabau&#8217;s built-in billing keeps the 21199 claim attached to its operative note, so the biller never hunts for supporting records.<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:35px;width:800px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 id=\"h-clinical-indications-and-icd-10-diagnosis-pairings\" class=\"wp-block-heading\">Clinical indications and ICD-10 diagnosis pairings<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Selecting the correct ICD-10 diagnosis code is critical for CPT code 21199 claims. Most payers deny the claim outright if the paired diagnosis misses their medical necessity definition for surgical OSA treatment.<\/p>\n\n\n\n<table style=\"width:100%;border-collapse:separate;border-spacing:0;border-radius:12px;overflow:hidden;font-size:15px;line-height:1.5;margin:1.5em 0 2em;box-shadow:0 2px 12px rgba(0,0,0,0.08)\">\n<thead>\n<tr>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">ICD-10-CM code<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Description<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Notes<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">G47.33<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Obstructive sleep apnea (adult) (pediatric)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Primary pairing for most CPT 21199 claims, confirmed against FY2026 ICD-10-CM<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">G47.30<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sleep apnea, unspecified<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Use only when sleep apnea type is not documented; G47.33 preferred<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">M26.09<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Other specified anomalies of jaw size<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Co-code when mandibular retrognathism contributes to OSA<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">M26.10<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Unspecified anomaly of jaw-cranial base relationship<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Applicable when cephalometric analysis documents skeletal discrepancy<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">R06.83<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Snoring<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Secondary code only; insufficient alone for medical necessity<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">When a jaw deformity contributes to the airway obstruction, co-coding an M26.xx code strengthens the medical necessity narrative.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Confirm the pairing your payer accepts before submission. Commercial policies are often stricter than Medicare Local Coverage Determinations, and the two rarely change in the same year.<\/p>\n\n\n\n<h2 id=\"h-applicable-modifiers\" class=\"wp-block-heading\">Applicable modifiers<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Modifier selection for CPT code 21199 turns on the surgical context. Who operated, and what else happened in the same session, decides the answer. Incorrect modifier use is one of the top denial triggers for this code.<\/p>\n\n\n\n<table style=\"width:100%;border-collapse:separate;border-spacing:0;border-radius:12px;overflow:hidden;font-size:15px;line-height:1.5;margin:1.5em 0 2em;box-shadow:0 2px 12px rgba(0,0,0,0.08)\">\n<thead>\n<tr>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Modifier<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Name<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">When to use<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">-51<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Multiple procedures<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Use when CPT 21199 runs alongside another procedure in the same session, such as UPPP. It applies to the secondary procedure.<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">-62<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Two surgeons<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Use when an OMFS and an ENT co-surgeon each perform distinct portions. Each bills 21199 with -62 at 62.5% of the allowed amount.<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">-80<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Assistant surgeon<\/td>\n<td style=\"padding:12px 16px;color:#374151\">For a qualified assistant surgeon. Medicare pays 16% of the allowed amount.<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">-22<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Increased procedural services<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Use when the procedure is substantially more complex than typical. Documentation must explain the added complexity.<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">-79<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Unrelated procedure during global period<\/td>\n<td style=\"padding:12px 16px;color:#374151\">For a separately identifiable surgery during the 90-day global period, unrelated to the original procedure.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">Modifier -62 requires both surgeons to dictate separate operative notes describing their distinct roles. Payers ask for those notes at audit, and a single shared note invites a recoupment request.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Practices treating athletic injuries manage these procedures inside <a href=\"https:\/\/pabau.com\/industry\/sports-medicine-software\/\">sports medicine software<\/a>, from initial assessment to return-to-play.<\/p>\n\n\n\n<h2 id=\"h-2026-medicare-fee-schedule-and-reimbursement-rates\" class=\"wp-block-heading\">2026 Medicare fee schedule and reimbursement rates<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Medicare reimbursement for CPT code 21199 runs on the Resource-Based Relative Value Scale (RBRVS). Total payment is the sum of the Work RVU, the Practice Expense RVU, and the Malpractice RVU. Each one is multiplied by a Geographic Practice Cost Index (GPCI) and the 2026 Conversion Factor.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pull the current figures from the <a href=\"https:\/\/www.cms.gov\/medicare\/physician-fee-schedule\/search\/overview\" target=\"_blank\" rel=\"nofollow noopener\">CMS fee schedule lookup<\/a> before you submit. Rates are updated annually, and the Conversion Factor moves every January.<\/p>\n\n\n\n<h3 id=\"h-work-rvu-breakdown\" class=\"wp-block-heading\">Work RVU breakdown<\/h3>\n\n\n\n<table style=\"width:100%;border-collapse:separate;border-spacing:0;border-radius:12px;overflow:hidden;font-size:15px;line-height:1.5;margin:1.5em 0 2em;box-shadow:0 2px 12px rgba(0,0,0,0.08)\">\n<thead>\n<tr>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">RVU component<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Value (approximate)<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Description<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Work RVU (wRVU)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">~16.31<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Surgeon&#8217;s time, skill, and intensity; the largest component<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Practice Expense RVU<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Differs between facility and non-facility settings<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Overhead costs; lower in facility settings (hospital absorbs facility expense)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Malpractice RVU<\/td>\n<td style=\"padding:12px 16px;color:#374151\">~0.8<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Professional liability component; reflects surgical risk profile<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Global period<\/td>\n<td style=\"padding:12px 16px;color:#374151\">90 days<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Post-operative care bundled into the surgical fee for 90 days<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">The values above are approximate and drawn from the current CMS file. Your locality&#8217;s GPCI adjustments set the final dollar amount, so check them before billing. Commercial payer rates for CPT code 21199 typically run 110-150% of Medicare, depending on the contract.<\/p>\n\n\n        <div id=\"pro_tip\">\n            <div class=\"img\">\n                <svg width=\"42\" height=\"42\" viewBox=\"0 0 42 42\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                    <path fill-rule=\"evenodd\" clip-rule=\"evenodd\"\n                        d=\"M12.6383 19.5238C12.6632 21.2071 12.8734 22.9926 12.0685 24.5523C11.0341 26.8917 8.45076 28.169 7.56292 30.5918C6.63082 33.1061 7.19505 36.185 9.31371 37.9786C10.929 39.5678 13.4183 39.9873 15.6061 39.5463C17.4592 39.073 19.1049 37.8388 19.9706 36.1608C20.781 34.7141 20.7866 32.9904 20.5293 31.3985C20.1006 29.3092 18.3775 27.8705 16.9807 26.362C14.8814 24.1005 14.6684 20.6854 15.595 17.8915C16.4331 15.4768 19.0026 14.2344 20.0425 11.9461C20.7202 10.6769 20.7506 9.20327 20.6068 7.81304C20.1864 5.40098 18.3139 3.23631 15.8716 2.56674C13.9742 2.03969 11.8224 2.30052 10.1739 3.37614C8.70522 4.34688 7.5878 5.86618 7.28356 7.58178C6.76081 9.82981 7.53525 12.2822 9.20307 13.9118C10.7658 15.4741 12.4806 17.2273 12.6383 19.5238Z\"\n                        fill=\"#2BADD4\" \/>\n                    <path fill-rule=\"evenodd\" clip-rule=\"evenodd\"\n                        d=\"M22.7048 19.8387C22.6822 22.3279 24.4507 24.6234 26.7493 25.4682C28.0531 25.961 29.4725 25.9183 30.7989 25.5487C32.0575 24.9955 33.301 24.2237 34.0069 23.0092C34.8384 21.5811 35.2982 19.8286 34.7832 18.2094C34.3611 16.2507 32.8739 14.6541 31.0275 13.9426C28.6736 12.9595 25.8073 13.7942 24.1719 15.7001C23.2022 16.8366 22.6143 18.3326 22.7048 19.8387Z\"\n                        fill=\"#2BADD4\" \/>\n                <\/svg>\n            <\/div>\n            <div class=\"text\">\n                <h3>Pro Tip<\/h3>\n                <p>Pull your 2026 Medicare allowed amount for CPT 21199 from the CMS Physician Fee Schedule look-up tool, using your own MAC locality. National averages can sit 15-25% away from local rates. Billing the wrong one either leaves money on the table or triggers an overpayment audit.<\/p>\n            <\/div>\n        <\/div>\n    \n\n\n<h2 id=\"h-medical-necessity-and-insurance-coverage-criteria\" class=\"wp-block-heading\">Medical necessity and insurance coverage criteria<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Most commercial payers and Medicare Advantage plans cover genioglossus advancement for OSA only after conservative treatment has failed. A claim submitted without evidence of failed CPAP therapy will almost certainly deny on first submission.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Standard medical necessity criteria across major payers include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Documented moderate-to-severe OSA: An AHI of 15 or greater, or an AHI of 5-14 with hypoxemia, cardiovascular comorbidity, or excessive daytime sleepiness<\/li>\n\n\n\n<li>Polysomnography (sleep study) results showing obstructive events, performed within 12-24 months of the surgery date (payer timelines vary)<\/li>\n\n\n\n<li>A documented CPAP trial and failure, with compliance data showing inadequate response or intolerance after at least three months (timeframes vary by payer)<\/li>\n\n\n\n<li>Upper airway evaluation confirming retroglossic obstruction as the anatomical target<\/li>\n\n\n\n<li>Cephalometric analysis when mandibular anatomy is a contributing factor<\/li>\n\n\n\n<li>Referral or consultation note from a sleep medicine physician supporting surgical intervention<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Several items on that list carry codes of their own. A diagnostic sleep study bills as CPT code 95810.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The device itself bills as HCPCS code E0601, and its compliance download is what the payer actually reads.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Some plans also ask whether an oral appliance was tried before surgery. That device bills as HCPCS code E0486, and its trial record belongs in the same authorization packet.<\/p>\n\n\n\n<h3 id=\"h-prior-authorization-requirements-for-orthognathic-surgery\" class=\"wp-block-heading\">Prior authorization requirements for orthognathic surgery<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Virtually all commercial payers require prior authorization for CPT code 21199. Medicare fee-for-service does not require it for most surgical procedures, but Medicare Advantage plans frequently do.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Step 1:<\/strong> Obtain and document the sleep study (polysomnography or home sleep apnea test) with AHI and oxygen saturation data<\/li>\n\n\n\n<li><strong>Step 2:<\/strong> Document the CPAP trial failure with download data showing poor adherence, or objective evidence of intolerance<\/li>\n\n\n\n<li><strong>Step 3:<\/strong> Complete upper airway evaluation, including drug-induced sleep endoscopy (DISE) if required by the plan<\/li>\n\n\n\n<li><strong>Step 4:<\/strong> Submit the request with the operative plan, sleep study results, CPAP compliance data, and referring physician notes<\/li>\n\n\n\n<li><strong>Step 5:<\/strong> Obtain written authorization confirmation with reference number before scheduling the procedure<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tracking authorization status across several payers eats front-desk hours. Attaching the approval letter to the patient record through digital forms keeps the reference number where your biller will look for it.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/cdn.pabau.com\/cdn\/attachments\/pulse\/content-engine\/billing_codes\/cpt-code-21199\/digital-forms.webp\" alt=\"Digital forms in Pabau\"\/><figcaption class=\"wp-element-caption\"><em>Pabau&#8217;s digital forms hold the sleep study and CPAP download on the patient record, so the pre-auth packet is ready before surgery day.<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:35px;width:800px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Audit requests reach the same records that HIPAA compliance governs, so access logs and retention rules apply to every document in the packet.<\/p>\n\n\n\n<h2 id=\"h-documentation-requirements-for-billing-cpt-code-21199\" class=\"wp-block-heading\">Documentation requirements for billing CPT code 21199<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Missing documentation is the second most common reason CPT 21199 claims deny. Payers reviewing surgical claims for OSA treatment expect a complete clinical picture, and the operative report alone will not carry it.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Polysomnography report<\/strong> with AHI, RDI, oxygen saturation nadir, and sleep stage data<\/li>\n\n\n\n<li><strong>CPAP compliance documentation<\/strong> showing usage hours, leak data, and residual AHI, plus a physician note on intolerance or failure<\/li>\n\n\n\n<li><strong>Operative report<\/strong> describing the specific osteotomy site, genioglossus muscle advancement technique, and fixation method<\/li>\n\n\n\n<li><strong>Pre-operative imaging<\/strong> such as a cephalometric radiograph or CT scan, with measurements of mandibular anatomy and the planned advancement<\/li>\n\n\n\n<li><strong>Prior authorization letter<\/strong> with approval reference number and approved procedure code(s)<\/li>\n\n\n\n<li><strong>Referring sleep medicine physician note<\/strong> documenting recommendation for surgical intervention and patient counseling<\/li>\n\n\n\n<li><strong>Anesthesia record<\/strong> confirming general anesthesia, which some payers use to confirm this was a facility-level procedure<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Gather these documents at scheduling, not at billing. A pre-submission checklist that your biller signs off prevents the most common clean-claim failures. Keep it beside the coding cheat sheet so the whole team works from one list.<\/p>\n\n\n\n<h2 id=\"h-related-cpt-codes-for-mandibular-osteotomy\" class=\"wp-block-heading\">Related CPT codes for mandibular osteotomy<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">CPT code 21199 is one of several codes in the mandibular osteotomy range. Choosing the wrong adjacent code is a common error, particularly between 21198 and 21199.<\/p>\n\n\n\n<table style=\"width:100%;border-collapse:separate;border-spacing:0;border-radius:12px;overflow:hidden;font-size:15px;line-height:1.5;margin:1.5em 0 2em;box-shadow:0 2px 12px rgba(0,0,0,0.08)\">\n<thead>\n<tr>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">CPT code<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Description<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Key distinction from 21199<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">21193<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Reconstruction of mandibular rami, horizontal, vertical, C, or L osteotomy; without bone graft<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Ramus-based; no genioglossus advancement component<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">21194<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Reconstruction of mandibular rami, bone grafts<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Ramus with bone grafting; not a segmental body osteotomy<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">21195<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Reconstruction of mandibular rami and\/or body, sagittal split<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sagittal split ramus osteotomy (SSRO); broader jaw repositioning<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">21196<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Reconstruction of mandibular rami, sagittal split, with internal rigid fixation<\/td>\n<td style=\"padding:12px 16px;color:#374151\">SSRO with internal fixation; higher wRVU than 21195<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">21198<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Osteotomy, mandible, segmental<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Segmental osteotomy without genioglossus advancement. Use it when no GA is performed.<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\"><strong>21199<\/strong><\/td>\n<td style=\"padding:12px 16px;color:#374151\"><strong>Osteotomy, mandible, segmental; with genioglossus advancement<\/strong><\/td>\n<td style=\"padding:12px 16px;color:#374151\"><strong>This code. It adds GA to the segmental osteotomy.<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<h3 id=\"h-cpt-21198-vs-cpt-21199-key-differences\" class=\"wp-block-heading\">CPT 21198 vs CPT 21199: Key differences<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The one clinical distinction between 21198 and 21199 is the genioglossus advancement. If the operative report documents only a segmental mandibular osteotomy, bill CPT 21198. If it explicitly documents the GA component, the correct code is CPT 21199.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Using 21199 when only 21198 was performed is upcoding. Using 21198 when GA was performed is undercoding. It leaves money on the table and puts the note and the claim out of step at audit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Two neighbors outside the osteotomy range turn up in the same operative sessions. Grafting bone to the mandible is <a href=\"https:\/\/pabau.com\/procedure-codes\/cpt-code-21215\/\">CPT code 21215<\/a>.<\/p>\n\n\n\n<h2 id=\"h-global-period-and-post-operative-billing\" class=\"wp-block-heading\">Global period and post-operative billing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">CPT code 21199 carries a 90-day global period under CMS policy. Routine post-operative care is bundled into the surgical payment for the 90 days after the procedure. Billing an E\/M visit separately inside that window denies automatically unless a modifier is applied.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Modifier -24:<\/strong> Unrelated E\/M service during the global period. Applies when the office visit addresses a problem entirely unrelated to the OSA surgery (for example, an acute upper respiratory infection)<\/li>\n\n\n\n<li><strong>Modifier -25:<\/strong> Significant, separately identifiable E\/M on the same day as a procedure. It applies to a minor in-office procedure during the global period that is unrelated to the surgery<\/li>\n\n\n\n<li><strong>Modifier -79:<\/strong> Unrelated surgical procedure during the global period. Apply when performing a separately identifiable surgery on an unrelated body site during the 90-day window<\/li>\n\n\n\n<li><strong>Modifier -78:<\/strong> Unplanned return to the operating room. For complications requiring a return procedure related to the original surgery<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Routine follow-up appointments, wound checks, device adjustments, and post-op imaging tied to the advancement are all bundled. Do not bill them separately.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The global period starts on the day of surgery for a 90-day code. For major surgical procedures, the day before surgery sits inside the global package too.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">High surgical volumes make those windows hard to police by hand. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/cdn.pabau.com\/cdn\/attachments\/pulse\/content-engine\/billing_codes\/cpt-code-21199\/automated-communication-in-pabau.webp\" alt=\"Automated communication in Pabau\"\/><figcaption class=\"wp-element-caption\"><em>Automated messages confirm post-op visits inside the 90-day global period, so reception is not booking billable time by mistake.<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:35px;width:800px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 id=\"h-common-billing-errors-and-denial-reasons\" class=\"wp-block-heading\">Common billing errors and denial reasons<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Claims for CPT code 21199 deny more often than general surgical codes. OSA surgery draws medical necessity scrutiny, prior authorization requirements, and heavy documentation all at once. These are the most frequent denial triggers:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Missing or incomplete prior authorization:<\/strong> Performing the procedure without confirmed written authorization is the single largest denial driver. Verbal confirmation is not authorization<\/li>\n\n\n\n<li><strong>Insufficient CPAP failure documentation:<\/strong> A sleep study without machine compliance data, or a compliance period shorter than the payer&#8217;s minimum, triggers a medical necessity denial<\/li>\n\n\n\n<li><strong>Wrong ICD-10 code:<\/strong> Billing G47.30 for unspecified sleep apnea when the polysomnography report clearly names the obstructive type<\/li>\n\n\n\n<li><strong>21198 vs. 21199 confusion:<\/strong> Billing 21199 when the operative report never documents genioglossus advancement is upcoding, and audit review will deny it<\/li>\n\n\n\n<li><strong>Missing co-surgeon documentation:<\/strong> Applying modifier -62 without separate operative notes from both surgeons<\/li>\n\n\n\n<li><strong>Billing during the global period:<\/strong> Submitting routine post-op E\/M visits without modifier -24, creating automatic bundling denials<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">When a denial arrives, request the payer&#8217;s Explanation of Benefits (EOB) or remittance advice and read the denial code. Most first-submission denials for CPT 21199 are recoverable on appeal once the full medical record goes in.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bring in a certified professional coder (CPC) before you appeal a complex orthognathic claim. The <a href=\"https:\/\/www.aapc.com\/codes\/cpt-codes-range\/\" target=\"_blank\" rel=\"nofollow noopener\">AAPC coding reference<\/a> also carries billing guideline context for the musculoskeletal range that holds 21199.<\/p>\n\n\n        <div id=\"pro_tip\">\n            <div class=\"img\">\n                <svg width=\"42\" height=\"42\" viewBox=\"0 0 42 42\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                    <path fill-rule=\"evenodd\" clip-rule=\"evenodd\"\n                        d=\"M12.6383 19.5238C12.6632 21.2071 12.8734 22.9926 12.0685 24.5523C11.0341 26.8917 8.45076 28.169 7.56292 30.5918C6.63082 33.1061 7.19505 36.185 9.31371 37.9786C10.929 39.5678 13.4183 39.9873 15.6061 39.5463C17.4592 39.073 19.1049 37.8388 19.9706 36.1608C20.781 34.7141 20.7866 32.9904 20.5293 31.3985C20.1006 29.3092 18.3775 27.8705 16.9807 26.362C14.8814 24.1005 14.6684 20.6854 15.595 17.8915C16.4331 15.4768 19.0026 14.2344 20.0425 11.9461C20.7202 10.6769 20.7506 9.20327 20.6068 7.81304C20.1864 5.40098 18.3139 3.23631 15.8716 2.56674C13.9742 2.03969 11.8224 2.30052 10.1739 3.37614C8.70522 4.34688 7.5878 5.86618 7.28356 7.58178C6.76081 9.82981 7.53525 12.2822 9.20307 13.9118C10.7658 15.4741 12.4806 17.2273 12.6383 19.5238Z\"\n                        fill=\"#2BADD4\" \/>\n                    <path fill-rule=\"evenodd\" clip-rule=\"evenodd\"\n                        d=\"M22.7048 19.8387C22.6822 22.3279 24.4507 24.6234 26.7493 25.4682C28.0531 25.961 29.4725 25.9183 30.7989 25.5487C32.0575 24.9955 33.301 24.2237 34.0069 23.0092C34.8384 21.5811 35.2982 19.8286 34.7832 18.2094C34.3611 16.2507 32.8739 14.6541 31.0275 13.9426C28.6736 12.9595 25.8073 13.7942 24.1719 15.7001C23.2022 16.8366 22.6143 18.3326 22.7048 19.8387Z\"\n                        fill=\"#2BADD4\" \/>\n                <\/svg>\n            <\/div>\n            <div class=\"text\">\n                <h3>Pro Tip<\/h3>\n                <p>Run a pre-submission checklist on every CPT 21199 claim. Confirm that the authorization reference number is on the claim and the polysomnography report is attached. Then check that the operative note names the genioglossus advancement, and that the diagnosis is G47.33 rather than G47.30. Five minutes here saves a 30-60 day denial cycle.<\/p>\n            <\/div>\n        <\/div>\n    \n\n\n<h2 id=\"h-how-claims-management-software-reduces-cpt-21199-denials\" class=\"wp-block-heading\">How claims management software reduces CPT 21199 denials<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">In most surgical practices this claim lives in three places at once. The sleep study arrives by fax from the referring physician, the authorization number sits in an email thread, and the operative note waits in transcription.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The claim then goes out when somebody remembers to chase all three. That is why so many 21199 denials are administrative rather than clinical.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pabau keeps the whole set on one patient record. Intake forms collect the polysomnography report and the CPAP download before surgery day. The authorization reference attaches to the case, and the operative note lands in the same chart. Your biller submits from one screen.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The same record serves both ends of the referral. A plastic surgery practice and a weight management program record their work in the same format. So conservative therapy and surgery both sit in one history when a payer asks for it.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Related CPT codes<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/pabau.com\/procedure-codes\/cpt-code-20680\/\">CPT code 20680 \u2014 Removal of Implant; Deep<\/a><\/li>\n\n\n<li><a href=\"https:\/\/pabau.com\/procedure-codes\/cpt-code-21255\/\">CPT code 21255 \u2014 Zygomatic arch and glenoid fossa reconstruction<\/a><\/li>\n\n\n<li><a href=\"https:\/\/pabau.com\/procedure-codes\/cpt-code-20150\/\">CPT code 20150 \u2014 Excision of epiphyseal bar<\/a><\/li>\n<\/ul>\n\n\n        <div id=\"book_a_demo\">\n            <div class=\"left-side\">\n                <div class=\"logo\">\n                    <img decoding=\"async\"\n                        src=\"https:\/\/pabau.com\/wp-content\/uploads\/2026\/01\/Logo.svg\"\n                        alt=\"Logo\"\n                        loading=\"lazy\"\n                    \/>\n                <\/div>\n\n                <h3 class=\"heading\">\n                    Reduce CPT 21199 denials with tighter billing workflows                <\/h3>\n\n                <p class=\"description\">\n                    Pabau tracks prior authorization status, attaches operative documentation, and manages post-op billing through the 90-day global period. Surgical practices run all of it from one record instead of three systems.                <\/p>\n\n                <div class=\"button-group\">\n                    <a href=\"\/book-demo\/\" class=\"btn btn-scale-effect btn-cta-color btn-md\">\n                        <span class=\"btn-text\">Book a demo<\/span>\n                        <div class=\"btn-icon btn-icon-right\" aria-hidden=\"true\">\n                            <svg\n                                width=\"14\"\n                                height=\"12\"\n                                viewBox=\"0 0 14 12\"\n                                fill=\"none\"\n                                xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n                            >\n                                <path\n                                    d=\"M0.75 4.77295C0.335786 4.77295 0 5.10874 0 5.52295C0 5.93716 0.335786 6.27295 0.75 6.27295V5.52295V4.77295ZM13.2803 6.05328C13.5732 5.76039 13.5732 5.28551 13.2803 4.99262L8.50736 0.219648C8.21447 -0.073245 7.73959 -0.073245 7.4467 0.219648C7.15381 0.512542 7.15381 0.987415 7.4467 1.28031L11.6893 5.52295L7.4467 9.76559C7.15381 10.0585 7.15381 10.5334 7.4467 10.8263C7.73959 11.1191 8.21447 11.1191 8.50736 10.8263L13.2803 6.05328ZM0.75 5.52295V6.27295L12.75 6.27295V5.52295V4.77295L0.75 4.77295V5.52295Z\"\n                                    fill=\"currentColor\"\n                                ><\/path>\n                            <\/svg>\n                        <\/div>\n                    <\/a>\n                <\/div>\n            <\/div>\n\n            <div class=\"right-side\">\n                <img decoding=\"async\"\n                    src=\"https:\/\/pabau.com\/wp-content\/uploads\/2026\/01\/Home-Page-Concept-4.webp\"\n                    alt=\"Pabau claims management dashboard for surgical practices\"\n                    loading=\"lazy\"\n                \/>\n            <\/div>\n        <\/div>\n        \n\n\n<h2 id=\"h-conclusion\" class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">CPT code 21199 fails more often than most surgical codes for one reason. It asks for a complete authorization package, a specific ICD-10 pairing, and an operative note that names the genioglossus advancement.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So treat the paperwork as part of scheduling rather than part of billing. Assemble the document set while the case is being booked, and by the time the claim goes out there is nothing left to chase.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/pabau.com\/book-demo\/\">Book a demo<\/a> to see how Pabau keeps the authorization, the sleep study, and the operative note on one record for every 21199 case.<\/p>\n\n\n        <div id=\"expert_picks\">\n            <div class=\"header\">\n                                    <img decoding=\"async\" src=\"https:\/\/pabau.com\/wp-content\/uploads\/2025\/11\/Expert-Picks.svg\" alt=\"Continue your research\" height=\"42\" width=\"42\">\n                                <h3>Continue your research<\/h3>\n            <\/div>\n            <div class=\"content\">\n                                                            <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#54B2D3\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p><strong>Need a broader CPT surgical billing reference?<\/strong> <a href=\"https:\/\/pabau.com\/procedure-codes\/ivf-cpt-codes\/\" target=\"_blank\" rel=\"noopener\">IVF CPT codes<\/a> covers multi-procedure billing with prior authorization workflows that mirror the OSA surgery process.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#54B2D3\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p><strong>Managing compliance documentation alongside billing?<\/strong> <a href=\"https:\/\/pabau.com\/blog\/hipaa-compliance-checklist-for-primary-care\/\" target=\"_blank\" rel=\"noopener\">HIPAA compliance checklist for primary care<\/a> sets out the documentation standards that protect practices during payer audits.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#54B2D3\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p><strong>Exploring practice management for surgical specialties?<\/strong> <a href=\"https:\/\/pabau.com\/blog\/plastic-surgery-practice-emr-software\/\" target=\"_blank\" rel=\"noopener\">Plastic surgery practice EMR software<\/a> explains the features that hold up in a high-complexity billing environment.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#54B2D3\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p><strong>Coding another procedure in the maxillofacial range?<\/strong> <a href=\"https:\/\/pabau.com\/procedure-codes\/cpt-code-21255\/\" target=\"_blank\" rel=\"noopener\">CPT code 21255<\/a> walks through its ICD-10 pairings, modifiers, and documentation requirements.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#54B2D3\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p><strong>Billing a facial fracture repair next?<\/strong> <a href=\"https:\/\/pabau.com\/procedure-codes\/cpt-code-21330\/\" target=\"_blank\" rel=\"noopener\">CPT code 21330<\/a> covers the medical necessity criteria and the denial triggers to watch for.<\/p>\n                        <\/div>\n                                                <\/div>\n        <\/div>\n    \n\n\n<h2 id=\"h-frequently-asked-questions\" class=\"wp-block-heading\">Frequently asked questions<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1786352960250\"><h3 class=\"schema-faq-question\">What is CPT code 21199?<\/h3> <p class=\"schema-faq-answer\">CPT code 21199 is the AMA procedure code for osteotomy, mandible, segmental, with genioglossus advancement. The surgeon repositions a segment of the mandible to advance the genioglossus muscle attachment. That enlarges the upper airway and treats obstructive sleep apnea. The code sits in the Musculoskeletal System, Head subsection of the CPT codebook.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1786352960251\"><h3 class=\"schema-faq-question\">What is the reimbursement rate for CPT 21199?<\/h3> <p class=\"schema-faq-answer\">Medicare builds the payment from the Work RVU of approximately 16.31, the Practice Expense RVU, and the Malpractice RVU. Each is multiplied by locality-adjusted GPCIs and the annual Conversion Factor. Check the 2026 dollar amount for your own MAC locality in the CMS Physician Fee Schedule lookup tool. National averages and local rates can differ by 15-25%.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1786352960252\"><h3 class=\"schema-faq-question\">Does Medicare cover CPT 21199 for sleep apnea?<\/h3> <p class=\"schema-faq-answer\">Traditional Medicare generally covers CPT code 21199 on three conditions. Polysomnography must show an AHI of 15 or greater, compliance data must document CPAP failure, and a sleep medicine physician must recommend surgery. Medicare Advantage plans may add prior authorization and apply their own criteria, which can differ from Local Coverage Determinations (LCDs).<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1786352960253\"><h3 class=\"schema-faq-question\">What is the difference between CPT 21198 and CPT 21199?<\/h3> <p class=\"schema-faq-answer\">CPT 21198 describes a segmental mandibular osteotomy without genioglossus advancement. CPT 21199 adds the advancement to the same osteotomy. The choice rests entirely on whether the operative report documents that the genioglossus muscle was advanced. Billing 21199 when only 21198 was performed is upcoding.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1786352960254\"><h3 class=\"schema-faq-question\">What is the global period for CPT 21199?<\/h3> <p class=\"schema-faq-answer\">CPT 21199 carries a 90-day global period under CMS policy. Routine post-operative care inside that window is bundled into the surgical payment. Billing an E\/M visit separately needs modifier -24 for unrelated services. Modifier -78 covers an unplanned return to the operating room for a related complication.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1786352960255\"><h3 class=\"schema-faq-question\">What documentation is required to bill CPT 21199?<\/h3> <p class=\"schema-faq-answer\">Six documents make up the packet. You need the polysomnography report with AHI and oxygen saturation data, the CPAP compliance download, and the operative report naming the advancement technique. You also need pre-operative imaging, the prior authorization confirmation letter, and a referring sleep medicine physician note. Missing any one of them raises the denial risk sharply.<\/p> <\/div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>CPT code 21199 is defined by the American Medical Association (AMA) as: Osteotomy, mandible, segmental; with genioglossus advancement. It sits in the Musculoskeletal System section of the CPT codebook, under the Head subsection. The surgery repositions a segment of the mandible to pull the genioglossus muscle forward. That enlarges the upper airway and reduces soft-tissue [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":174855,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_linkdex":"77","_yoast_wpseo_content_score":"30","_yoast_wpseo_is_cornerstone":"","_yoast_wpseo_keywordsynonyms":"[\"\",\"\",\"\",\"\"]","_yoast_wpseo_focuskw_text_input":"","_seo_original_html":"","footnotes":""},"categories":[1433,1546],"tags":[2937],"class_list":["post-174858","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-billing-codes","category-cpt-codes","tag-sleep-apnea-treatment"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.3 (Yoast SEO v28.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>CPT code 21199: Billing, RVUs, and denial fixes<\/title>\n<meta name=\"description\" content=\"CPT code 21199 covers segmental mandibular osteotomy with genioglossus advancement. Pair it with G47.33 and document CPAP failure.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pabau.com\/de\/procedure-codes\/cpt-code-21199\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CPT code 21199: Billing, RVUs, and denial fixes\" \/>\n<meta property=\"og:description\" content=\"CPT code 21199 covers segmental mandibular osteotomy with genioglossus advancement. Pair it with G47.33 and document CPAP failure.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/pabau.com\/de\/procedure-codes\/cpt-code-21199\/\" \/>\n<meta property=\"og:site_name\" content=\"Pabau\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Pabau\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-10T12:25:58+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-08-17T12:09:17+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/pabau.com\/wp-content\/uploads\/2026\/08\/cpt-code-21199.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"630\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Maja Popovska\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@pabaucrm\" \/>\n<meta name=\"twitter:site\" content=\"@pabaucrm\" \/>\n<meta name=\"twitter:label1\" content=\"Verfasst von\" \/>\n\t<meta name=\"twitter:data1\" content=\"Maja Popovska\" \/>\n\t<meta name=\"twitter:label2\" content=\"Gesch\u00e4tzte Lesezeit\" \/>\n\t<meta name=\"twitter:data2\" content=\"13\u00a0Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/pabau.com\\\/de\\\/procedure-codes\\\/cpt-code-21199\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/de\\\/procedure-codes\\\/cpt-code-21199\\\/\"},\"author\":{\"name\":\"Maja Popovska\",\"@id\":\"https:\\\/\\\/pabau.com\\\/de\\\/#\\\/schema\\\/person\\\/b00aec1dd379f0ddcf6137d78e2a21db\"},\"headline\":\"CPT code 21199: Osteotomy, mandible, segmental with genioglossus advancement\",\"datePublished\":\"2026-08-10T12:25:58+00:00\",\"dateModified\":\"2026-08-17T12:09:17+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/de\\\/procedure-codes\\\/cpt-code-21199\\\/\"},\"wordCount\":2690,\"publisher\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/de\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/de\\\/procedure-codes\\\/cpt-code-21199\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/pabau.com\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/cpt-code-21199.webp\",\"keywords\":[\"Sleep Apnea Treatment\"],\"articleSection\":[\"Billing Codes\",\"CPT Codes\"],\"inLanguage\":\"de\"},{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\\\/\\\/pabau.com\\\/de\\\/procedure-codes\\\/cpt-code-21199\\\/\",\"url\":\"https:\\\/\\\/pabau.com\\\/de\\\/procedure-codes\\\/cpt-code-21199\\\/\",\"name\":\"CPT code 21199: Billing, RVUs, and denial fixes\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/de\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/de\\\/procedure-codes\\\/cpt-code-21199\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/de\\\/procedure-codes\\\/cpt-code-21199\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/pabau.com\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/cpt-code-21199.webp\",\"datePublished\":\"2026-08-10T12:25:58+00:00\",\"dateModified\":\"2026-08-17T12:09:17+00:00\",\"description\":\"CPT code 21199 covers segmental mandibular osteotomy with genioglossus advancement. 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It combines scheduling, electronic health records, clinical forms, payments, marketing automation, reporting, and patient engagement tools into one secure cloud system to help practices streamline operations and grow their business.\",\"foundingDate\":\"2011-10-20\",\"numberOfEmployees\":{\"@type\":\"QuantitativeValue\",\"minValue\":\"201\",\"maxValue\":\"500\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/pabau.com\\\/de\\\/#\\\/schema\\\/person\\\/b00aec1dd379f0ddcf6137d78e2a21db\",\"name\":\"Maja Popovska\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\\\/\\\/pabau.com\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/cropped-Maja-Popovska_WP-1-96x96.jpeg\",\"url\":\"https:\\\/\\\/pabau.com\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/cropped-Maja-Popovska_WP-1-96x96.jpeg\",\"contentUrl\":\"https:\\\/\\\/pabau.com\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/cropped-Maja-Popovska_WP-1-96x96.jpeg\",\"caption\":\"Maja Popovska\"},\"description\":\"Maja is a Senior Content Writer at Pabau, where she covers everything from practice management and compliance to medical aesthetics and patient experience. Off the clock: binging true crime docuseries, baking and dreaming about travel.\",\"url\":\"https:\\\/\\\/pabau.com\\\/de\\\/blog\\\/author\\\/maja-popovska\\\/\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/de\\\/procedure-codes\\\/cpt-code-21199\\\/#faq-question-1786352960250\",\"position\":1,\"url\":\"https:\\\/\\\/pabau.com\\\/de\\\/procedure-codes\\\/cpt-code-21199\\\/#faq-question-1786352960250\",\"name\":\"What is CPT code 21199?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"CPT code 21199 is the AMA procedure code for osteotomy, mandible, segmental, with genioglossus advancement. The surgeon repositions a segment of the mandible to advance the genioglossus muscle attachment. That enlarges the upper airway and treats obstructive sleep apnea. The code sits in the Musculoskeletal System, Head subsection of the CPT codebook.\",\"inLanguage\":\"de\"},\"inLanguage\":\"de\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/de\\\/procedure-codes\\\/cpt-code-21199\\\/#faq-question-1786352960251\",\"position\":2,\"url\":\"https:\\\/\\\/pabau.com\\\/de\\\/procedure-codes\\\/cpt-code-21199\\\/#faq-question-1786352960251\",\"name\":\"What is the reimbursement rate for CPT 21199?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Medicare builds the payment from the Work RVU of approximately 16.31, the Practice Expense RVU, and the Malpractice RVU. Each is multiplied by locality-adjusted GPCIs and the annual Conversion Factor. Check the 2026 dollar amount for your own MAC locality in the CMS Physician Fee Schedule lookup tool. National averages and local rates can differ by 15-25%.\",\"inLanguage\":\"de\"},\"inLanguage\":\"de\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/de\\\/procedure-codes\\\/cpt-code-21199\\\/#faq-question-1786352960252\",\"position\":3,\"url\":\"https:\\\/\\\/pabau.com\\\/de\\\/procedure-codes\\\/cpt-code-21199\\\/#faq-question-1786352960252\",\"name\":\"Does Medicare cover CPT 21199 for sleep apnea?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Traditional Medicare generally covers CPT code 21199 on three conditions. Polysomnography must show an AHI of 15 or greater, compliance data must document CPAP failure, and a sleep medicine physician must recommend surgery. Medicare Advantage plans may add prior authorization and apply their own criteria, which can differ from Local Coverage Determinations (LCDs).\",\"inLanguage\":\"de\"},\"inLanguage\":\"de\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/de\\\/procedure-codes\\\/cpt-code-21199\\\/#faq-question-1786352960253\",\"position\":4,\"url\":\"https:\\\/\\\/pabau.com\\\/de\\\/procedure-codes\\\/cpt-code-21199\\\/#faq-question-1786352960253\",\"name\":\"What is the difference between CPT 21198 and CPT 21199?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"CPT 21198 describes a segmental mandibular osteotomy without genioglossus advancement. CPT 21199 adds the advancement to the same osteotomy. The choice rests entirely on whether the operative report documents that the genioglossus muscle was advanced. Billing 21199 when only 21198 was performed is upcoding.\",\"inLanguage\":\"de\"},\"inLanguage\":\"de\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/de\\\/procedure-codes\\\/cpt-code-21199\\\/#faq-question-1786352960254\",\"position\":5,\"url\":\"https:\\\/\\\/pabau.com\\\/de\\\/procedure-codes\\\/cpt-code-21199\\\/#faq-question-1786352960254\",\"name\":\"What is the global period for CPT 21199?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"CPT 21199 carries a 90-day global period under CMS policy. Routine post-operative care inside that window is bundled into the surgical payment. Billing an E\\\/M visit separately needs modifier -24 for unrelated services. 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Off the clock: binging true crime docuseries, baking and dreaming about travel.","url":"https:\/\/pabau.com\/de\/blog\/author\/maja-popovska\/"},{"@type":"Question","@id":"https:\/\/pabau.com\/de\/procedure-codes\/cpt-code-21199\/#faq-question-1786352960250","position":1,"url":"https:\/\/pabau.com\/de\/procedure-codes\/cpt-code-21199\/#faq-question-1786352960250","name":"What is CPT code 21199?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"CPT code 21199 is the AMA procedure code for osteotomy, mandible, segmental, with genioglossus advancement. The surgeon repositions a segment of the mandible to advance the genioglossus muscle attachment. That enlarges the upper airway and treats obstructive sleep apnea. The code sits in the Musculoskeletal System, Head subsection of the CPT codebook.","inLanguage":"de"},"inLanguage":"de"},{"@type":"Question","@id":"https:\/\/pabau.com\/de\/procedure-codes\/cpt-code-21199\/#faq-question-1786352960251","position":2,"url":"https:\/\/pabau.com\/de\/procedure-codes\/cpt-code-21199\/#faq-question-1786352960251","name":"What is the reimbursement rate for CPT 21199?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Medicare builds the payment from the Work RVU of approximately 16.31, the Practice Expense RVU, and the Malpractice RVU. Each is multiplied by locality-adjusted GPCIs and the annual Conversion Factor. Check the 2026 dollar amount for your own MAC locality in the CMS Physician Fee Schedule lookup tool. National averages and local rates can differ by 15-25%.","inLanguage":"de"},"inLanguage":"de"},{"@type":"Question","@id":"https:\/\/pabau.com\/de\/procedure-codes\/cpt-code-21199\/#faq-question-1786352960252","position":3,"url":"https:\/\/pabau.com\/de\/procedure-codes\/cpt-code-21199\/#faq-question-1786352960252","name":"Does Medicare cover CPT 21199 for sleep apnea?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Traditional Medicare generally covers CPT code 21199 on three conditions. Polysomnography must show an AHI of 15 or greater, compliance data must document CPAP failure, and a sleep medicine physician must recommend surgery. Medicare Advantage plans may add prior authorization and apply their own criteria, which can differ from Local Coverage Determinations (LCDs).","inLanguage":"de"},"inLanguage":"de"},{"@type":"Question","@id":"https:\/\/pabau.com\/de\/procedure-codes\/cpt-code-21199\/#faq-question-1786352960253","position":4,"url":"https:\/\/pabau.com\/de\/procedure-codes\/cpt-code-21199\/#faq-question-1786352960253","name":"What is the difference between CPT 21198 and CPT 21199?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"CPT 21198 describes a segmental mandibular osteotomy without genioglossus advancement. CPT 21199 adds the advancement to the same osteotomy. The choice rests entirely on whether the operative report documents that the genioglossus muscle was advanced. Billing 21199 when only 21198 was performed is upcoding.","inLanguage":"de"},"inLanguage":"de"},{"@type":"Question","@id":"https:\/\/pabau.com\/de\/procedure-codes\/cpt-code-21199\/#faq-question-1786352960254","position":5,"url":"https:\/\/pabau.com\/de\/procedure-codes\/cpt-code-21199\/#faq-question-1786352960254","name":"What is the global period for CPT 21199?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"CPT 21199 carries a 90-day global period under CMS policy. Routine post-operative care inside that window is bundled into the surgical payment. Billing an E\/M visit separately needs modifier -24 for unrelated services. Modifier -78 covers an unplanned return to the operating room for a related complication.","inLanguage":"de"},"inLanguage":"de"},{"@type":"Question","@id":"https:\/\/pabau.com\/de\/procedure-codes\/cpt-code-21199\/#faq-question-1786352960255","position":6,"url":"https:\/\/pabau.com\/de\/procedure-codes\/cpt-code-21199\/#faq-question-1786352960255","name":"What documentation is required to bill CPT 21199?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Six documents make up the packet. You need the polysomnography report with AHI and oxygen saturation data, the CPAP compliance download, and the operative report naming the advancement technique. You also need pre-operative imaging, the prior authorization confirmation letter, and a referring sleep medicine physician note. Missing any one of them raises the denial risk sharply.","inLanguage":"de"},"inLanguage":"de"}]}},"yoast":{"focus_keyword":"CPT code 21199","seo_title":"CPT code 21199: Billing, RVUs, and denial fixes","meta_description":"CPT code 21199 covers segmental mandibular osteotomy with genioglossus advancement. 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