{"id":158596,"date":"2026-07-17T14:32:50","date_gmt":"2026-07-17T14:32:50","guid":{"rendered":"https:\/\/pabau.com\/?p=158596"},"modified":"2026-08-17T11:36:55","modified_gmt":"2026-08-17T11:36:55","slug":"cpt-code-31051","status":"publish","type":"post","link":"https:\/\/pabau.com\/es\/procedure-codes\/cpt-code-31051\/","title":{"rendered":"CPT Code 31051: Sinusotomy, Sphenoid, with Mucosal Stripping or Polyp Removal"},"content":{"rendered":"\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"MedicalWebPage\",\"headline\":\"CPT Code 31051: Sinusotomy, sphenoid, with mucosal stripping or polyp removal\",\"description\":\"Complete billing reference for CPT code 31051 (sinusotomy, sphenoid, with or without biopsy; with mucosal stripping or removal of polyp(s)). Covers RVU values, ICD-10 crosswalks, modifiers, documentation requirements, and common coding errors.\",\"url\":\"https:\/\/pabau.com\/procedure-codes\/cpt-code-31051\/\",\"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\":\"2026-07-17\",\"dateModified\":\"2026-07-17\"}<\/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 31051 describes sinusotomy, sphenoid, with or without biopsy, with mucosal stripping or removal of polyp(s) \u2014 an open surgical incision into the sphenoid sinus under the Respiratory System (Incision Procedures on the Accessory Sinuses) subsection<\/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>31051 is an open approach code and must not be substituted for endoscopic sinus surgery codes (31237-31298), which cover a distinct surgical technique<\/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 primary ICD-10-CM diagnosis code paired with 31051 is J32.3 (chronic sphenoidal sinusitis) \u2014 modifier 51 applies when billing as part of a multi-procedure session<\/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, through its claims management tools, supports ENT billing workflows, helping practices submit accurate sphenoid sinus surgery claims with fewer denials<\/p>\n                        <\/div>\n                                                <\/div>\n        <\/div>\n    \n\n\n<p class=\"wp-block-paragraph\">CPT code 31051 is a billable code for an open sinusotomy of the sphenoid sinus, with or without biopsy, with mucosal stripping or removal of polyp(s). It sits in a narrow section of the CPT manual, next to its base code 31050, where an open vs. endoscopic distinction and a mucosal-stripping detail create regular billing errors for even experienced ENT coders.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This guide covers the official descriptor, how 31051 differs from 31050, the ICD-10 pairings payers expect, RVU values, modifiers, and the documentation that keeps a 31051 claim from being denied.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">CPT code 31051: Definition, descriptor, and CPT manual placement<\/h2>\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\">\n<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>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Official long descriptor:<\/strong> Sinusotomy, sphenoid, with or without biopsy; with mucosal stripping or removal of polyp(s).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">CPT code 31051 is published and maintained 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 part of the CPT code set. Within the CPT manual structure, it appears under:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Section:<\/strong> Surgery<\/li><li><strong>Subsystem:<\/strong> Respiratory System<\/li><li><strong>Subsection:<\/strong> Accessory Sinuses<\/li><li><strong>Subheading:<\/strong> Incision<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The phrase \u00abwith or without biopsy\u00bb applies to both 31050 and 31051 &#8211; neither code needs a separate biopsy code when a tissue sample is taken during the same operative session. What actually separates 31051 from 31050 is mucosal stripping or polyp removal: 31051 applies when the surgeon strips diseased mucosa or removes a polyp from the sphenoid sinus, on top of everything 31050 already covers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Explore CPT coding resources for more on how AMA codes are structured across clinical areas.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Procedure description: sphenoid sinusotomy with mucosal stripping or polyp removal<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">CPT code 31051 describes an open surgical incision into the sphenoid sinus. The sphenoid sinus sits at the base of the skull, posterior to the nasal cavity, making it the most surgically challenging of the paranasal sinuses to access.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In a standard sinusotomy, the surgeon creates a controlled opening in the sinus wall to drain accumulated fluid, pus, or mucosal disease. When the clinical indication requires tissue diagnosis (suspected neoplasm, granulomatous disease, or persistent chronic sinusitis unresponsive to conservative treatment), a biopsy specimen may be collected during the same approach &#8211; biopsy status doesn&#8217;t change which code applies, since both 31050 and 31051 already include \u00abwith or without biopsy.\u00bb<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">What determines 31051 specifically is whether the surgeon also strips diseased mucosa or removes a polyp from the sphenoid sinus during the same operative session. The operative note should document this detail explicitly, since it is what separates 31051 from its base code, 31050.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Key clinical details that support 31051 selection:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Open surgical approach (not endoscopic)<\/li><li>Target site is the sphenoid sinus specifically<\/li><li>Mucosal stripping or removal of polyp(s) is performed during the same operative session &#8211; the detail that specifically supports 31051 over 31050<\/li><li>Biopsy may or may not be performed in the same session (this applies equally to 31050 and 31051)<\/li><li>Procedure is distinct from frontal, ethmoid, or maxillary sinus approaches, which carry their own CPT codes<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">CPT 31050 vs 31051: key differences<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">CPT 31050 and CPT code 31051 share a surgical site but differ in one clinically meaningful way. Understanding the distinction prevents both upcoding and undercoding on sphenoid sinus claims.<\/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\">Feature<\/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\">CPT 31050<\/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\">CPT Code 31051<\/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\">Full descriptor<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sinusotomy, sphenoid, with or without biopsy<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Sinusotomy, sphenoid, with or without biopsy; with mucosal stripping or removal of polyp(s)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Mucosal stripping \/ polyp removal<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Not included<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Included<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Surgical approach<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Open<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Open<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">When to use<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Drainage\/incision only, no mucosal stripping or polyp removal<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Mucosal stripping or polyp removal performed (biopsy allowed either way)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Common diagnosis pairing<\/td>\n<td style=\"padding:12px 16px;color:#374151\">J32.3, chronic sphenoidal sinusitis<\/td>\n<td style=\"padding:12px 16px;color:#374151\">J32.3, neoplasm suspected (D49.1 or similar)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">In practice, 31051 is the correct code whenever the operative note documents mucosal stripping or removal of a polyp from the sphenoid sinus. Use 31050 only when the operative report documents a sinusotomy with no mucosal stripping or polyp removal &#8211; biopsy status doesn&#8217;t affect the choice between the two codes, since both already include \u00abwith or without biopsy.\u00bb<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Inside <a href=\"https:\/\/pabau.com\/industry\/gp-clinic-software\/\">software for GP practices<\/a>, cardiopulmonary test results feed straight into the patient&#8217;s ongoing management plan.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">CPT code 31051 vs endoscopic sinus surgery codes<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This is where the highest-value coding errors occur. CPT code 31051 is an open procedure. The endoscopic sinus surgery series, codes 31237 through 31298, describes a fundamentally different surgical technique involving an endoscope passed through the nasal cavity.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Substituting 31051 for an endoscopic code (or vice versa) is a clinical documentation mismatch that payers audit directly, and NCCI edits flag certain combinations.<\/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\">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\">Approach<\/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\">Series<\/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\">Sphenoid specific?<\/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\">31050<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Open<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Accessory sinus incision<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Yes (no mucosal stripping\/polyp removal)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">31051<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Open<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Accessory sinus incision<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Yes (with mucosal stripping\/polyp removal)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">31237-31298<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Endoscopic<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Endoscopic sinus surgery<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Varies by code<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">For reference on other surgical procedure coding references and how procedural CPT families are structured, that resource illustrates how the AMA organises related codes into series within a subsection. The approach documented in the operative report governs code selection. An endoscopic approach must never be billed with 31051.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">ICD-10 diagnosis codes for CPT code 31051<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Medical necessity for sphenoid sinusotomy must be supported by a diagnosis code that justifies the procedure. The primary ICD-10-CM code paired with CPT code 31051 is J32.3 (chronic sphenoidal sinusitis). Payers expect a documented clinical basis that connects the diagnosis to the surgical indication.<\/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\">When to use with 31051<\/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\">J32.3<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Chronic sphenoidal sinusitis<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Primary diagnosis for most 31051 claims<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">J32.4<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Chronic pansinusitis<\/td>\n<td style=\"padding:12px 16px;color:#374151\">When multiple sinus involvement documented<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">J01.30<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Acute sphenoidal sinusitis, unspecified<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Acute presentations requiring surgical drainage<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">J33.0<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Polyp of nasal cavity<\/td>\n<td style=\"padding:12px 16px;color:#374151\">When polyposis extends to sphenoid<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">J39.8<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Other specified diseases of upper respiratory tract<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Atypical presentations or granulomatous disease<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">Some payers apply local coverage determinations (LCDs) to sphenoid sinus procedures. These policies may require documentation of prior conservative treatment failure before approving a surgical approach. Verify current LCD status through the <a href=\"https:\/\/www.cms.gov\/medicare\/physician-fee-schedule\/search\/overview\" target=\"_blank\" rel=\"nofollow noopener\">CMS fee schedule tool<\/a> before submitting claims for Medicare beneficiaries.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The same specificity logic governs ICD-10-CM lookup and pairing generally: codes like K82.1 follow the same payer-driven documentation standard as J32.3. Coders working across specialties will also see it with M34.9, where aligning procedural and diagnostic codes correctly is just as important for reimbursement.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Medicare reimbursement and RVU values for CPT code 31051<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Medicare reimbursement for CPT code 31051 is calculated using the Resource-Based Relative Value Scale (RBRVS). Final payment amounts vary by geographic locality, facility vs. non-facility setting, and the annual Medicare Physician Fee Schedule update.<\/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\">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\">Facility<\/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\">Non-Facility<\/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<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Varies by year<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Varies by year<\/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\">Lower (facility absorbs)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Higher (physician bears cost)<\/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\">Included in total<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Included in total<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Payment basis<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Total RVU x conversion factor x GPCI<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Total RVU x conversion factor x GPCI<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">Always use the current-year CMS data for accurate reimbursement calculations. The <a href=\"https:\/\/fastrvu.com\/tools\/rvu-lookup\" target=\"_blank\" rel=\"nofollow noopener\">FastRVU RVU lookup tool<\/a> provides current work, practice expense, and malpractice RVU values for CPT code 31051 using CMS MPFS data, with verified annual figures cross-referenced directly against the Medicare Physician Fee Schedule. Refer also to procedure code fee schedules for a comparison of how fee schedules operate across payer types.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Modifiers for CPT code 31051<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Applying the wrong modifier to CPT code 31051 is a fast path to claim rejection. Three modifiers come up regularly in ENT surgical billing.<\/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\">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\">When to apply with 31051<\/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\">Modifier 51<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Multiple procedures<\/td>\n<td style=\"padding:12px 16px;color:#374151\">When 31051 is a secondary procedure in the same operative session &#8211; verify it is not modifier-51 exempt before applying<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Modifier 50<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Bilateral procedure<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Applies when both sphenoid sinuses are addressed in the same operative session, with bilateral access explicitly documented (subject to payer rules)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Modifier 59<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Distinct procedural service<\/td>\n<td style=\"padding:12px 16px;color:#374151\">When 31051 is billed alongside a code that would otherwise be bundled under NCCI edits and the procedures are genuinely distinct<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">Modifier 51 status should be verified against the current AMA modifier 51 exemption list for each claim year. Some payers have additional modifier stacking requirements that differ from Medicare policy. The sphenoid sinus is a paired structure divided by an intersinus septum, so always confirm with your payer&#8217;s billing guidelines and document bilateral access clearly before applying modifier 50 to a sphenoid sinusotomy.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Documentation requirements for correct billing of CPT code 31051<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Inadequate operative documentation is the primary driver of post-payment audits for CPT code 31051. The operative report must establish four things before a claim can withstand payer scrutiny.<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li><strong>Surgical approach:<\/strong> The report must explicitly state that an open approach was used. Language such as \u00abexternal approach to the sphenoid sinus\u00bb or \u00abopen sinusotomy\u00bb distinguishes 31051 from endoscopic codes and protects against audit findings.<\/li><li><strong>Target sinus identification:<\/strong> The sphenoid sinus must be named as the operative site. A generic \u00absinus procedure\u00bb note is insufficient for code-specific medical necessity.<\/li><li><strong>Mucosal stripping, polyp removal, and biopsy status:<\/strong> Document whether mucosal stripping or polyp removal was performed &#8211; this is what determines 31051 vs. 31050. Separately, if a biopsy was taken, document specimen collection, laterality, and the clinical indication (e.g., rule out neoplasm); if no biopsy was taken, note that the procedure was performed without tissue sampling.<\/li><li><strong>Medical necessity:<\/strong> Document the clinical history that justifies surgery, including prior conservative treatment attempts (antibiotics, nasal corticosteroids, imaging findings), the duration of symptoms, and the failure of non-surgical options.<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Using digital clinical documentation tools and structured operative note templates closes the documentation shortfalls that trigger denials. For HIPAA-compliant record keeping requirements that govern how operative notes must be stored and transmitted, practices should review their administrative safeguards. The same discipline applies to procedures like 00529, where approach-specificity is just as critical to correct code selection.<\/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-31051\/digital-forms.webp\" alt=\"Digital forms\"\/><figcaption class=\"wp-element-caption\"><em>Digital forms<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Common coding errors for sinus surgery claims<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Claims for CPT code 31051 fail for predictable reasons. Identifying these patterns before submission reduces denial rates and administrative rework.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Error 1: Using 31051 for endoscopic procedures.<\/strong> If the operative note documents endoscopic access (nasal endoscope, angled telescopes, image-guided navigation), the correct code range is 31237-31298. Billing 31051 for an endoscopic procedure misrepresents the surgical technique. This is a frequent post-payment audit finding.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Error 2: Adding a separate biopsy code.<\/strong> Because 31051 already includes \u00abwith or without biopsy,\u00bb appending a standalone biopsy CPT code is inappropriate when biopsy is performed during the same sinusotomy session. NCCI bundling edits flag this combination.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Error 3: Downgrading to 31050 when mucosal stripping or polyp removal was performed.<\/strong> Some coders default to 31050 even when the operative note documents mucosal stripping or polyp removal. If either was performed, 31051 is the correct code, regardless of whether a biopsy was also taken.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Error 4: Omitting a modifier when multiple procedures are performed.<\/strong> When 31051 is one of several procedures in the same session, modifier 51 (or the payer-required equivalent) is needed on secondary procedures. Missing this modifier often triggers automatic reduction or denial of the secondary procedure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Error 5: Mismatched ICD-10-CM specificity.<\/strong> Using J32.9 (chronic sinusitis, unspecified) when the operative note documents confirmed sphenoidal involvement reduces medical necessity support. J32.3 is the specific and correct code when the sphenoid sinus is the documented site.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For a broader view of how code pairing and crosswalk logic works across procedure-diagnosis combinations, the <a href=\"https:\/\/crosscoder.com\/\" target=\"_blank\" rel=\"nofollow noopener\">CrossCoder bidirectional crosswalk tool<\/a> provides LCD\/LCA policy data alongside ICD-10 to CPT mappings.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How practice management software supports accurate sinus surgery billing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">ENT practices billing CPT code 31051 regularly deal with a predictable set of claim friction points: approach-code mismatches, missing modifiers, and insufficient diagnosis specificity. Each one is a documentation problem before it becomes a billing problem.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pabau&#8217;s claims management software supports ENT billing workflows by connecting clinical documentation to claim creation in a single system &#8211; the same workflow plastic surgery practices rely on for equally complex procedure coding. When operative note templates capture approach type, biopsy status, and diagnosis specificity at the point of care, the information required to build a clean 31051 claim is already structured and retrievable.<\/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-31051\/automate-claims-through-healthcode.webp\" alt=\"Automate claims and billing with Pabau\"\/><figcaption class=\"wp-element-caption\"><em>Automate claims and billing with Pabau<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n\n\n<p class=\"wp-block-paragraph\">For practices managing sinus surgery billing at volume &#8211; whether ENT, dermatology, or another procedure-heavy specialty &#8211; a practice management platform that integrates scheduling, documentation, and billing reduces the manual transfer steps where coding errors most often occur. Rather than moving procedure information from an operative note into a separate billing system by hand, the claim builds from structured data already entered during the clinical encounter.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pabau also supports automated billing workflows that flag incomplete documentation before claim submission, reducing the rate at which 31051 claims reach a payer with missing modifiers or unspecific diagnosis codes. For practices managing HIPAA-compliant record keeping obligations alongside their billing operations, a unified system simplifies audit trail maintenance and records retention.<\/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-31051\/automated-communication-in-pabau.webp\" alt=\"Automated communication in Pabau\"\/><figcaption class=\"wp-element-caption\"><em>Automated communication in Pabau<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\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-36561\/\">CPT code 36561 \u2014 Tunneled Central Venous Catheter with Subcutaneous Port<\/a><\/li>\n\n\n<li><a href=\"https:\/\/pabau.com\/procedure-codes\/cpt-code-31500\/\">CPT code 31500 \u2014 Intubation, Endotracheal, Emergency Procedure<\/a><\/li>\n\n\n<li><a href=\"https:\/\/pabau.com\/procedure-codes\/cpt-code-31579\/\">CPT code 31579 \u2014 Laryngoscopy with stroboscopy<\/a><\/li>\n\n\n<li><a href=\"https:\/\/pabau.com\/procedure-codes\/cpt-code-32408\/\">CPT code 32408 \u2014 Core needle biopsy, lung or mediastinum<\/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 ENT billing errors with Pabau                <\/h3>\n\n                <p class=\"description\">\n                    Connect clinical documentation to claim creation in one system. Pabau helps ENT practices submit accurate CPT code 31051 claims with fewer denials and less manual rework.                <\/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 practice management and billing dashboard\"\n                    loading=\"lazy\"\n                \/>\n            <\/div>\n        <\/div>\n        \n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">CPT code 31051 is a precise code for a precise procedure. Most errors follow predictable patterns: an open vs. endoscopic mix-up, a misread descriptor, or missing documentation that reaches the claim undetected.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Practices that connect their operative documentation to their billing workflow reduce those errors before they become denials. Pabau&#8217;s claims management tools are built for exactly this, giving ENT billing teams structured data at the point of submission rather than a paper trail to reconstruct after the fact. If your practice is submitting sphenoid sinus surgery claims, see how Pabau handles this end to end.<\/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 structured billing workflow for your ENT practice?<\/strong> <a href=\"https:\/\/pabau.com\/features\/claims-management-software\/\" rel=\"noopener\">Claims management software<\/a> connects procedure documentation to claim submission, reducing ENT billing errors.<\/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 clinical notes and operative reports digitally?<\/strong> <a href=\"https:\/\/pabau.com\/features\/patient-intake-software\/\" rel=\"noopener\">Digital forms<\/a> support structured operative note capture for procedures like sphenoid sinusotomy.<\/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>Need a refresher on another ICD-10 diagnosis code?<\/strong> <a href=\"https:\/\/pabau.com\/diagnostic-codes\/icd-10-code-t3132\/\" rel=\"noopener\">T31.32<\/a> covers descriptor and documentation guidance for another billable diagnosis code.<\/p>\n                        <\/div>\n                                                <\/div>\n        <\/div>\n    \n\n\n<h2 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-1784295567883\"><h3 class=\"schema-faq-question\">What is CPT code 31051 used for?<\/h3> <p class=\"schema-faq-answer\">CPT code 31051 is used to report an open sinusotomy of the sphenoid sinus, with or without biopsy, with mucosal stripping or removal of polyp(s). ENT surgeons and coders use it when an open surgical incision is made into the sphenoid sinus to strip diseased mucosa, remove polyps, drain disease, or collect a tissue sample, and when the procedure is not performed endoscopically.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1784295567884\"><h3 class=\"schema-faq-question\">What is the difference between CPT 31050 and 31051?<\/h3> <p class=\"schema-faq-answer\">Both CPT 31050 and 31051 include the option \u00abwith or without biopsy,\u00bb so a biopsy alone does not decide which code applies. The real difference is mucosal stripping or removal of polyp(s): CPT 31051 includes this additional work, while CPT 31050 does not. Use 31051 when the operative note documents mucosal stripping or polyp removal, and 31050 when the sinusotomy was performed without either.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1784295567885\"><h3 class=\"schema-faq-question\">Is CPT 31051 an open or endoscopic sinus procedure?<\/h3> <p class=\"schema-faq-answer\">CPT 31051 is strictly an open surgical procedure. Endoscopic sphenoid sinus surgery is reported using codes from the 31237-31298 series. The operative note must document the approach used, and open vs. endoscopic is an auditable distinction. Billing 31051 for an endoscopic procedure misrepresents the surgical technique and is an upcoding\/undercoding risk.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1784295567886\"><h3 class=\"schema-faq-question\">What modifiers apply to CPT code 31051?<\/h3> <p class=\"schema-faq-answer\">Modifier 51 (multiple procedures) applies when CPT code 31051 is a secondary procedure in a multi-procedure session, subject to verification against the current AMA modifier 51 exemption list. Modifier 59 (distinct procedural service) may apply when NCCI bundling edits would otherwise combine 31051 with another code and the procedures are genuinely distinct. Modifier 50 (bilateral) applies when both sphenoid sinuses are addressed in the same operative session, with bilateral access explicitly documented, subject to payer rules.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1784295567887\"><h3 class=\"schema-faq-question\">Which ICD-10 diagnosis codes are paired with CPT 31051?<\/h3> <p class=\"schema-faq-answer\">The primary ICD-10-CM diagnosis code paired with CPT 31051 is J32.3 (chronic sphenoidal sinusitis). Additional codes include J01.30 (acute sphenoidal sinusitis, unspecified), J32.4 (chronic pansinusitis), and J33.0 (polyp of nasal cavity) depending on documented clinical findings. Use the most specific code supported by the operative and clinical notes.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1784295567888\"><h3 class=\"schema-faq-question\">What are the RVU values for CPT code 31051?<\/h3> <p class=\"schema-faq-answer\">RVU values for CPT code 31051 vary by calendar year and facility type. Work RVU, practice expense RVU, and malpractice RVU components are published annually in the CMS Medicare Physician Fee Schedule. Use the AAPC Codify CPT lookup or the CMS MPFS search tool for current-year RVU data. Facility rates differ from non-facility rates due to practice expense allocation.<\/p> <\/div> <\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>CPT code 31051 is a billable code for an open sinusotomy of the sphenoid sinus, with or without biopsy, with mucosal stripping or removal of polyp(s). It sits in a narrow section of the CPT manual, next to its base code 31050, where an open vs. endoscopic distinction and a mucosal-stripping detail create regular billing [&hellip;]<\/p>\n","protected":false},"author":77,"featured_media":158594,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_linkdex":"91","_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":[],"class_list":["post-158596","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-billing-codes","category-cpt-codes"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.2 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>CPT Code 31051: Descriptor, Modifiers and ICD-10 Codes<\/title>\n<meta name=\"description\" content=\"CPT code 31051: sphenoid sinusotomy with mucosal stripping or polyp removal. 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Full descriptor, ICD-10 pairing, and modifier rules explained.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/pabau.com\/es\/procedure-codes\/cpt-code-31051\/\" \/>\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=\"2026-07-17T14:32:50+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-08-17T11:36:55+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/pabau.com\/wp-content\/uploads\/2026\/07\/cpt-code-31051.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=\"Katy Piper\" \/>\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=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Katy Piper\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tiempo de lectura\" \/>\n\t<meta name=\"twitter:data2\" content=\"13 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/cpt-code-31051\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/cpt-code-31051\\\/\"},\"author\":{\"name\":\"Katy Piper\",\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/#\\\/schema\\\/person\\\/5de22f4ff3ec59b1925ef02dce956d7d\"},\"headline\":\"CPT Code 31051: Sinusotomy, Sphenoid, with Mucosal Stripping or Polyp Removal\",\"datePublished\":\"2026-07-17T14:32:50+00:00\",\"dateModified\":\"2026-08-17T11:36:55+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/cpt-code-31051\\\/\"},\"wordCount\":2538,\"publisher\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/cpt-code-31051\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/pabau.com\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/cpt-code-31051.webp\",\"articleSection\":[\"Billing Codes\",\"CPT Codes\"],\"inLanguage\":\"es\"},{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/cpt-code-31051\\\/\",\"url\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/cpt-code-31051\\\/\",\"name\":\"CPT Code 31051: Descriptor, Modifiers and ICD-10 Codes\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/cpt-code-31051\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/cpt-code-31051\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/pabau.com\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/cpt-code-31051.webp\",\"datePublished\":\"2026-07-17T14:32:50+00:00\",\"dateModified\":\"2026-08-17T11:36:55+00:00\",\"description\":\"CPT code 31051: sphenoid sinusotomy with mucosal stripping or polyp removal. 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Outside of work, she's usually chasing her border collie around muddy fields or hunting down the best flat white in town.\",\"url\":\"https:\\\/\\\/pabau.com\\\/es\\\/blog\\\/author\\\/katy-piper\\\/\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/cpt-code-31051\\\/#faq-question-1784295567883\",\"position\":1,\"url\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/cpt-code-31051\\\/#faq-question-1784295567883\",\"name\":\"What is CPT code 31051 used for?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"CPT code 31051 is used to report an open sinusotomy of the sphenoid sinus, with or without biopsy, with mucosal stripping or removal of polyp(s). ENT surgeons and coders use it when an open surgical incision is made into the sphenoid sinus to strip diseased mucosa, remove polyps, drain disease, or collect a tissue sample, and when the procedure is not performed endoscopically.\",\"inLanguage\":\"es\"},\"inLanguage\":\"es\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/cpt-code-31051\\\/#faq-question-1784295567884\",\"position\":2,\"url\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/cpt-code-31051\\\/#faq-question-1784295567884\",\"name\":\"What is the difference between CPT 31050 and 31051?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Both CPT 31050 and 31051 include the option \\\"with or without biopsy,\\\" so a biopsy alone does not decide which code applies. The real difference is mucosal stripping or removal of polyp(s): CPT 31051 includes this additional work, while CPT 31050 does not. Use 31051 when the operative note documents mucosal stripping or polyp removal, and 31050 when the sinusotomy was performed without either.\",\"inLanguage\":\"es\"},\"inLanguage\":\"es\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/cpt-code-31051\\\/#faq-question-1784295567885\",\"position\":3,\"url\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/cpt-code-31051\\\/#faq-question-1784295567885\",\"name\":\"Is CPT 31051 an open or endoscopic sinus procedure?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"CPT 31051 is strictly an open surgical procedure. Endoscopic sphenoid sinus surgery is reported using codes from the 31237-31298 series. The operative note must document the approach used, and open vs. endoscopic is an auditable distinction. Billing 31051 for an endoscopic procedure misrepresents the surgical technique and is an upcoding\\\/undercoding risk.\",\"inLanguage\":\"es\"},\"inLanguage\":\"es\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/cpt-code-31051\\\/#faq-question-1784295567886\",\"position\":4,\"url\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/cpt-code-31051\\\/#faq-question-1784295567886\",\"name\":\"What modifiers apply to CPT code 31051?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Modifier 51 (multiple procedures) applies when CPT code 31051 is a secondary procedure in a multi-procedure session, subject to verification against the current AMA modifier 51 exemption list. Modifier 59 (distinct procedural service) may apply when NCCI bundling edits would otherwise combine 31051 with another code and the procedures are genuinely distinct. Modifier 50 (bilateral) applies when both sphenoid sinuses are addressed in the same operative session, with bilateral access explicitly documented, subject to payer rules.\",\"inLanguage\":\"es\"},\"inLanguage\":\"es\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/cpt-code-31051\\\/#faq-question-1784295567887\",\"position\":5,\"url\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/cpt-code-31051\\\/#faq-question-1784295567887\",\"name\":\"Which ICD-10 diagnosis codes are paired with CPT 31051?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The primary ICD-10-CM diagnosis code paired with CPT 31051 is J32.3 (chronic sphenoidal sinusitis). Additional codes include J01.30 (acute sphenoidal sinusitis, unspecified), J32.4 (chronic pansinusitis), and J33.0 (polyp of nasal cavity) depending on documented clinical findings. 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Outside of work, she's usually chasing her border collie around muddy fields or hunting down the best flat white in town.","url":"https:\/\/pabau.com\/es\/blog\/author\/katy-piper\/"},{"@type":"Question","@id":"https:\/\/pabau.com\/es\/procedure-codes\/cpt-code-31051\/#faq-question-1784295567883","position":1,"url":"https:\/\/pabau.com\/es\/procedure-codes\/cpt-code-31051\/#faq-question-1784295567883","name":"What is CPT code 31051 used for?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"CPT code 31051 is used to report an open sinusotomy of the sphenoid sinus, with or without biopsy, with mucosal stripping or removal of polyp(s). ENT surgeons and coders use it when an open surgical incision is made into the sphenoid sinus to strip diseased mucosa, remove polyps, drain disease, or collect a tissue sample, and when the procedure is not performed endoscopically.","inLanguage":"es"},"inLanguage":"es"},{"@type":"Question","@id":"https:\/\/pabau.com\/es\/procedure-codes\/cpt-code-31051\/#faq-question-1784295567884","position":2,"url":"https:\/\/pabau.com\/es\/procedure-codes\/cpt-code-31051\/#faq-question-1784295567884","name":"What is the difference between CPT 31050 and 31051?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Both CPT 31050 and 31051 include the option \"with or without biopsy,\" so a biopsy alone does not decide which code applies. The real difference is mucosal stripping or removal of polyp(s): CPT 31051 includes this additional work, while CPT 31050 does not. Use 31051 when the operative note documents mucosal stripping or polyp removal, and 31050 when the sinusotomy was performed without either.","inLanguage":"es"},"inLanguage":"es"},{"@type":"Question","@id":"https:\/\/pabau.com\/es\/procedure-codes\/cpt-code-31051\/#faq-question-1784295567885","position":3,"url":"https:\/\/pabau.com\/es\/procedure-codes\/cpt-code-31051\/#faq-question-1784295567885","name":"Is CPT 31051 an open or endoscopic sinus procedure?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"CPT 31051 is strictly an open surgical procedure. Endoscopic sphenoid sinus surgery is reported using codes from the 31237-31298 series. The operative note must document the approach used, and open vs. endoscopic is an auditable distinction. Billing 31051 for an endoscopic procedure misrepresents the surgical technique and is an upcoding\/undercoding risk.","inLanguage":"es"},"inLanguage":"es"},{"@type":"Question","@id":"https:\/\/pabau.com\/es\/procedure-codes\/cpt-code-31051\/#faq-question-1784295567886","position":4,"url":"https:\/\/pabau.com\/es\/procedure-codes\/cpt-code-31051\/#faq-question-1784295567886","name":"What modifiers apply to CPT code 31051?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Modifier 51 (multiple procedures) applies when CPT code 31051 is a secondary procedure in a multi-procedure session, subject to verification against the current AMA modifier 51 exemption list. Modifier 59 (distinct procedural service) may apply when NCCI bundling edits would otherwise combine 31051 with another code and the procedures are genuinely distinct. Modifier 50 (bilateral) applies when both sphenoid sinuses are addressed in the same operative session, with bilateral access explicitly documented, subject to payer rules.","inLanguage":"es"},"inLanguage":"es"},{"@type":"Question","@id":"https:\/\/pabau.com\/es\/procedure-codes\/cpt-code-31051\/#faq-question-1784295567887","position":5,"url":"https:\/\/pabau.com\/es\/procedure-codes\/cpt-code-31051\/#faq-question-1784295567887","name":"Which ICD-10 diagnosis codes are paired with CPT 31051?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"The primary ICD-10-CM diagnosis code paired with CPT 31051 is J32.3 (chronic sphenoidal sinusitis). Additional codes include J01.30 (acute sphenoidal sinusitis, unspecified), J32.4 (chronic pansinusitis), and J33.0 (polyp of nasal cavity) depending on documented clinical findings. Use the most specific code supported by the operative and clinical notes.","inLanguage":"es"},"inLanguage":"es"},{"@type":"Question","@id":"https:\/\/pabau.com\/es\/procedure-codes\/cpt-code-31051\/#faq-question-1784295567888","position":6,"url":"https:\/\/pabau.com\/es\/procedure-codes\/cpt-code-31051\/#faq-question-1784295567888","name":"What are the RVU values for CPT code 31051?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"RVU values for CPT code 31051 vary by calendar year and facility type. Work RVU, practice expense RVU, and malpractice RVU components are published annually in the CMS Medicare Physician Fee Schedule. Use the AAPC Codify CPT lookup or the CMS MPFS search tool for current-year RVU data. Facility rates differ from non-facility rates due to practice expense allocation.","inLanguage":"es"},"inLanguage":"es"}]}},"yoast":{"focus_keyword":"CPT code 31051","seo_title":"CPT Code 31051: Descriptor, Modifiers and ICD-10 Codes","meta_description":"CPT code 31051: sphenoid sinusotomy with mucosal stripping or polyp removal. Full descriptor, ICD-10 pairing, and modifier rules explained.","content_score":"30","is_cornerstone":"","related_keyphrases":[{"keyword":"CPT code 31051 modifiers","score":61},{"keyword":"CPT code 31051 ICD-10","score":56},{"keyword":"CPT 31051 reimbursement","score":61}]},"_links":{"self":[{"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/posts\/158596","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/users\/77"}],"replies":[{"embeddable":true,"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/comments?post=158596"}],"version-history":[{"count":3,"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/posts\/158596\/revisions"}],"predecessor-version":[{"id":181541,"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/posts\/158596\/revisions\/181541"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/media\/158594"}],"wp:attachment":[{"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/media?parent=158596"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/categories?post=158596"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pabau.com\/es\/wp-json\/wp\/v2\/tags?post=158596"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}