{"id":159069,"date":"2026-07-20T10:20:34","date_gmt":"2026-07-20T10:20:34","guid":{"rendered":"https:\/\/pabau.com\/?p=159069"},"modified":"2026-08-17T11:59:24","modified_gmt":"2026-08-17T11:59:24","slug":"hcpcs-code-a9900","status":"publish","type":"post","link":"https:\/\/pabau.com\/es\/procedure-codes\/hcpcs-code-a9900\/","title":{"rendered":"HCPCS Code A9900: Miscellaneous DME supply billing guide"},"content":{"rendered":"\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"MedicalWebPage\",\"headline\":\"HCPCS Code A9900: Miscellaneous DME supply billing guide\",\"description\":\"HCPCS Code A9900 (Miscellaneous DME supply, accessory, and\/or service component of another HCPCS code) billing guide covering Medicare coverage, documentation, claim submission, and denial prevention.\",\"url\":\"https:\/\/pabau.com\/procedure-codes\/hcpcs-code-a9900\/\",\"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\":\"2026-07-20\",\"dateModified\":\"2026-07-20\"}<\/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>HCPCS Code A9900 bills a DME supply, accessory, or service component that is already part of another coded item, not a stand-alone item on its own.<\/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>Medicare typically denies A9900 under ANSI\/CARC reason code 97, treating the component as included in the payment for the primary DME item.<\/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>Use A9900 only for a component tied to an already-coded item; reach for A9999 instead when the supply itself has no HCPCS code at all.<\/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 helps medical aesthetics and wellness practices submit, track, and reconcile insurance claims, though DME suppliers billing Medicare Part B still need dedicated DME billing software.<\/p>\n                        <\/div>\n                                                <\/div>\n        <\/div>\n    \n\n\n<p class=\"wp-block-paragraph\">HCPCS code A9900 is a Level II code CMS defines as a miscellaneous DME supply, accessory, and\/or service component of another HCPCS code. It bills a component tied to durable medical equipment that already has its own code, not a stand-alone item.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Confusing it with HCPCS code A9999, the true miscellaneous catch-all, is the most common reason Medicare denies A9900 claims under CARC 97.<\/p>\n\n\n\n<h2 id=\"h-hcpcs-code-a9900-definition-and-official-cms-classification\" class=\"wp-block-heading\">HCPCS Code A9900: definition and official CMS classification<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Most A9900 denials come down to the same misunderstanding: billing it as a stand-alone item rather than what CMS built it to be, a supply, accessory, or service component tied to a DME item that already carries its own HCPCS code. That distinction is preventable once you know what the code is for.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HCPCS Code A9900 is a <a href=\"https:\/\/www.cms.gov\/medicare\/coding-billing\/healthcare-common-procedure-system\" target=\"_blank\" rel=\"nofollow noopener\">HCPCS Level II<\/a> code maintained by the Centers for Medicare &amp; Medicaid Services (CMS). Its official descriptor is: <em>Miscellaneous DME supply, accessory, and\/or service component of another HCPCS code.<\/em> It sits within the A-series (A0000-A9999), which covers transportation services, medical and surgical supplies, and durable medical equipment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A9900 is not the generic \u00abnot otherwise specified\u00bb catch-all some coders assume it is. That role belongs to <strong>HCPCS Code A9999<\/strong> (Miscellaneous DME supply or accessory, not otherwise specified), used when a stand-alone supply has no dedicated code at all.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A9900 covers something narrower: a supply, accessory, or service component that supports a DME item already billed under its own HCPCS code, such as CPAP tubing, oxygen system connectors, or a fitting service tied to equipment that already has a 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\">Field<\/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\">Detail<\/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\">Code<\/td>\n<td style=\"padding:12px 16px;color:#374151\">A9900<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Code system<\/td>\n<td style=\"padding:12px 16px;color:#374151\">HCPCS Level II<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Official descriptor<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Miscellaneous DME supply, accessory, and\/or service component of another HCPCS code<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Code series<\/td>\n<td style=\"padding:12px 16px;color:#374151\">A-series (A0000-A9999): transportation, medical\/surgical supplies, DME<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Maintained by<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Centers for Medicare &amp; Medicaid Services (CMS)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Code type<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Component code (billed alongside another HCPCS code, not a stand-alone NOC code)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Update cycle<\/td>\n<td style=\"padding:12px 16px;color:#374151\">HCPCS Level II codes are updated quarterly and annually by CMS<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">CMS releases HCPCS Level II updates on a rolling basis. Coders should always verify the current code set before billing. The <a href=\"https:\/\/www.pgmbilling.com\/hcpcs-lookup-tool\/\" target=\"_blank\" rel=\"nofollow noopener\">PGM Billing lookup tool<\/a> provides a free way to confirm A9900 remains active and unchanged in the current year&#8217;s release.<\/p>\n\n\n\n<h2 id=\"h-what-a9900-covers-eligible-supplies-and-use-cases\" class=\"wp-block-heading\">What A9900 covers: eligible supplies and use cases<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A9900 applies to a supply, accessory, or service component that supports a DME item already billed under its own HCPCS code, not the primary item itself. This covers a range of scenarios in practice. Common examples include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Replacement tubing, connectors, or fittings for a covered DME device that are billed separately from the primary item<\/li>\n\n\n\n<li>A setup, delivery, or fitting service tied to equipment that already carries its own HCPCS code<\/li>\n\n\n\n<li>Minor accessories supplied alongside a primary covered item that have no dedicated code of their own<\/li>\n\n\n\n<li>Maintenance or adjustment services performed on previously supplied, separately coded equipment<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For A9900 to apply, the primary DME item it supports must still meet CMS&#8217;s definition of durable medical equipment:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Designed for repeated use<\/li>\n\n\n\n<li>Primarily medical in nature<\/li>\n\n\n\n<li>Appropriate for home use<\/li>\n\n\n\n<li>Not useful to someone who is not ill or injured<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A9900 is not appropriate for consumable, disposable, or single-use items that belong in other code categories. It is also not appropriate when the component itself has a specific HCPCS code, or when no code exists at all for a stand-alone supply, since that is when A9999 applies instead.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Good medical documentation workflows reduce the temptation to reach for the wrong miscellaneous code.<\/p>\n\n\n\n<h2 id=\"h-when-to-use-a9900-vs-specific-hcpcs-codes\" class=\"wp-block-heading\">When to use A9900 vs. specific HCPCS codes<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The single most common error with A9900 is confusing it with A9999, or using it for items that already have a specific HCPCS code. Payers audit miscellaneous and component codes more closely than specific codes, and using A9900 incorrectly almost always results in denial under ANSI\/CARC reason code 97 or a request for additional documentation.<\/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\">Scenario<\/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\">Use A9900?<\/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\">Reason<\/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\">Standard CPAP tubing replacement<\/td>\n<td style=\"padding:12px 16px;color:#374151\">No<\/td>\n<td style=\"padding:12px 16px;color:#374151\">A4604 covers heated CPAP tubing; specific code exists<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Wheelchair arm pad, standard type<\/td>\n<td style=\"padding:12px 16px;color:#374151\">No<\/td>\n<td style=\"padding:12px 16px;color:#374151\">E0973 describes wheelchair accessory arm pads<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Fitting or setup service for a wheelchair billed under its own code, with no separate service code<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Yes<\/td>\n<td style=\"padding:12px 16px;color:#374151\">The service supports an already-coded item and has no specific code of its own<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Stand-alone supply with no dedicated code and no link to another coded item<\/td>\n<td style=\"padding:12px 16px;color:#374151\">No (use A9999)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">A9900 only covers components of an already-coded item; a true stand-alone NOC supply belongs under A9999<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Disposable, single-use consumable<\/td>\n<td style=\"padding:12px 16px;color:#374151\">No<\/td>\n<td style=\"padding:12px 16px;color:#374151\">A9900 and A9999 both cover DME accessories, not consumables; check A-series supply codes<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">Before billing HCPCS Code A9900, confirm two things: that the item is genuinely a component of an already-coded DME item, and that no more specific component code exists. Search the current HCPCS Level II code set using the <a href=\"https:\/\/www.aapc.com\/codes\/hcpcs-codes-range\/\" target=\"_blank\" rel=\"nofollow noopener\">AAPC HCPCS code lookup<\/a>. Document the search in your records, as some payers request evidence of it.<\/p>\n\n\n\n<h2 id=\"h-medicare-coverage-and-reimbursement-for-a9900\" class=\"wp-block-heading\">Medicare coverage and reimbursement for A9900<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Medicare Part B does not have a nationally published fee schedule rate for A9900, and in practice most A9900 claims are denied rather than paid as a separate line item. Medicare Administrative Contractors (MACs) typically deny A9900 under <strong>ANSI\/CARC reason code 97<\/strong>: payment for the component is considered already included in the allowance for the primary DME item it supports.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">CMS does not maintain a National Coverage Determination (NCD) specific to HCPCS Code A9900. Coverage of the underlying, primary DME item is governed by the relevant Local Coverage Determination (LCD).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Suppliers should check the applicable MAC&#8217;s LCD for the primary item to understand whether its components, accessories, or service elements are bundled into that payment. The <a href=\"https:\/\/www.cms.gov\/medicare\/physician-fee-schedule\/search\/overview\" target=\"_blank\" rel=\"nofollow noopener\">CMS fee schedule lookup<\/a> can help verify any published payment rates that may apply to the primary code.<\/p>\n\n\n\n<h3 id=\"h-medicaid-and-commercial-payer-policies\" class=\"wp-block-heading\">Medicaid and commercial payer policies<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">State Medicaid programs set their own DME coverage policies independently from Medicare. Whether a state Medicaid program separately reimburses a component billed under HCPCS Code A9900 depends entirely on that state&#8217;s fee schedule and coverage rules. Some states treat these components as bundled into the primary item regardless of MAC guidance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Commercial payers are similarly variable. Many follow Medicare LCD guidance as a baseline but apply their own coverage restrictions. Some commercial payers require pre-authorization for any miscellaneous or component code. Billers working with patient care management across multiple payers should document payer-specific A9900 policies in their internal billing references, as requirements can shift with contract renegotiations.<\/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>Before submitting an A9900 claim to any payer, call the provider services line and ask two questions: (1) Does your plan reimburse HCPCS Code A9900 separately for this component, or is it bundled into the primary item? (2) Is prior authorization required? Document the call with date, representative name, and reference number. That record is your best defense if the claim is later denied under CARC 97.<\/p>\n            <\/div>\n        <\/div>\n    \n\n\n<h2 id=\"h-documentation-requirements-for-a9900-claims\" class=\"wp-block-heading\">Documentation requirements for A9900 claims<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Component and miscellaneous codes attract higher scrutiny than specific HCPCS codes. Documentation for A9900 claims must do two things: establish that the component is medically necessary, and link it clearly to the primary, already-coded DME item it supports. Missing either increases denial risk significantly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Core documentation requirements include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Written order from a treating physician<\/strong> that identifies the item by name, quantity, and the medical condition requiring it<\/li>\n\n\n\n<li><strong>Statement of medical necessity<\/strong> explaining why the specific component is needed for the patient&#8217;s condition and treatment plan<\/li>\n\n\n\n<li><strong>Reference to the primary DME item&#8217;s HCPCS code<\/strong> that the component supports, since A9900 is billed alongside an already-coded item<\/li>\n\n\n\n<li><strong>Confirmation that no more specific HCPCS code applies<\/strong> to the component itself (some payers require a written statement from the biller or supplier)<\/li>\n\n\n\n<li><strong>Prior authorization approval number<\/strong> (when required by the payer or MAC jurisdiction)<\/li>\n\n\n\n<li><strong>Proof of delivery<\/strong> signed by the beneficiary or authorized representative<\/li>\n\n\n\n<li><strong>Detailed item description<\/strong> including manufacturer name, model number, and function<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Organized HIPAA-compliant record-keeping is not optional for A9900 claims. Payers may request documentation up to several years after the claim date during audits. Suppliers using digital intake forms can capture and store structured documentation at the point of care, making retrieval faster when payer requests arrive.<\/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\/hcpcs-code-a9900\/customizable-consent-and-intake-forms.webp\" alt=\"Customizable consent and intake forms\"\/><figcaption class=\"wp-element-caption\"><em>Customizable consent and intake forms<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\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                    Simplify claims and billing documentation with Pabau                <\/h3>\n\n                <p class=\"description\">\n                    Practice management software like Pabau helps medical aesthetics and wellness practices submit, track, and reconcile insurance claims, and capture structured documentation with digital intake forms, instead of juggling spreadsheets.                <\/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\"\n                    loading=\"lazy\"\n                \/>\n            <\/div>\n        <\/div>\n        \n\n\n<h2 id=\"h-how-to-bill-a9900-step-by-step-claim-submission\" class=\"wp-block-heading\">How to bill A9900: step-by-step claim submission<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Submitting an A9900 claim follows the same CMS-1500 form process as other HCPCS Level II DME claims, with additional steps to link the component to its primary, already-coded item. A structured approach reduces the likelihood of missing a required field.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Confirm the item is a component of an already-coded DME item, not a stand-alone supply.<\/strong> Search the current year&#8217;s HCPCS Level II code set for the primary equipment&#8217;s code. If the item genuinely has no code at all and no link to another coded item, use A9999 instead. Document your search result.<\/li>\n\n\n\n<li><strong>Obtain a valid written order.<\/strong> The treating physician must provide an order that identifies the item, quantity, and the relevant diagnosis code (ICD-10-CM) supporting medical necessity.<\/li>\n\n\n\n<li><strong>Obtain prior authorization if required.<\/strong> Contact the MAC or commercial payer before supplying the item. Some payers require prior authorization for all miscellaneous or component HCPCS codes.<\/li>\n\n\n\n<li><strong>Complete the CMS-1500 form.<\/strong> Enter A9900 in field 24D (Procedures, Services, or Supplies) and reference the primary item&#8217;s HCPCS code in the claim notes. Add the appropriate modifier in field 24D modifier column if applicable. Enter the relevant ICD-10-CM diagnosis code(s) in fields 21A-L and link them to the service line in field 24E.<\/li>\n\n\n\n<li><strong>Attach a narrative description.<\/strong> Some MACs and commercial payers require a written narrative attached to or submitted with the claim describing the item in detail. Check payer-specific requirements.<\/li>\n\n\n\n<li><strong>Submit with proof of delivery.<\/strong> Include the signed delivery confirmation. Electronic submission via EDI 837P is standard; attach documentation per payer instructions.<\/li>\n\n\n\n<li><strong>Track the claim and respond promptly to requests.<\/strong> A9900 claims are frequently denied under CARC 97 or trigger Additional Documentation Requests (ADRs). Dedicated DME billing software that flags pending responses reduces the risk of timely filing denials on resubmissions.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Good EHR integration between clinical documentation and billing workflows helps ensure the physician&#8217;s order, diagnosis codes, and supply description are consistent across the claim before submission. Inconsistencies between the clinical record and the claim form are a common audit trigger for component and miscellaneous codes.<\/p>\n\n\n\n<h2 id=\"h-common-billing-errors-and-denial-reasons-for-a9900\" class=\"wp-block-heading\">Common billing errors and denial reasons for A9900<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A9900 claims are denied more frequently than claims using specific HCPCS codes, most often under CARC 97 because payers treat the component as already included in the primary item&#8217;s payment. Most other denials fall into a small number of predictable categories.<\/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\">Denial reason<\/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\">Root cause<\/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\">Corrective action<\/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\">Bundled under CARC 97<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Payer considers the component already included in the allowance for the primary DME item<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Confirm with the payer whether the component is separately payable before billing; appeal with LCD documentation if it should be<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Specific code exists<\/td>\n<td style=\"padding:12px 16px;color:#374151\">A9900 used for a component when a more specific HCPCS code describes it<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Resubmit with the correct specific code and supporting documentation<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Insufficient documentation<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Missing medical necessity statement or item description<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Obtain and attach required documentation; resubmit within timely filing window<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">No prior authorization<\/td>\n<td style=\"padding:12px 16px;color:#374151\">PA required by payer but not obtained before supply<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Check payer PA requirements before supplying items billed as miscellaneous or component codes<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Missing modifier<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Required modifier (e.g. KX, GA, GZ) not appended to A9900<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Identify the applicable modifier from MAC policy; resubmit corrected claim<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Non-covered item<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Supply does not meet the payer&#8217;s DME definition or LCD criteria<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Review LCD coverage criteria; appeal with clinical documentation if coverage exists<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Narrative missing<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Payer required a written description attached to the claim<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Add detailed narrative per payer instructions and resubmit<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">Tracking denial patterns by payer, particularly how often claims are denied under CARC 97 versus other reasons, helps practices refine their A9900 workflow over time. Practices using robust <a href=\"https:\/\/pabau.com\/blog\/best-medical-practice-management-software\/\">medical practice management<\/a> tools can run reports on denial rates by payer, which surfaces which insurers require extra documentation steps before initial submission.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Using medical dictation tools to capture physician narrative at the point of care closes most of the missing documentation that drives A9900 denials.<\/p>\n\n\n\n<h3 id=\"h-a9900-and-hcpcs-modifiers\" class=\"wp-block-heading\">A9900 and HCPCS modifiers<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Modifiers are frequently required when billing HCPCS Code A9900 under Medicare. The applicable modifier depends on the MAC&#8217;s LCD policies and the specific coverage situation. Common modifiers that may apply:<\/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\">Meaning<\/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\">KX<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Requirements specified in the medical policy have been met<\/td>\n<td style=\"padding:12px 16px;color:#374151\">When the LCD coverage criteria are met and documentation is on file<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">GA<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Waiver of liability statement on file<\/td>\n<td style=\"padding:12px 16px;color:#374151\">When coverage is uncertain and an ABN has been signed by the beneficiary<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">GZ<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Item or service expected to be denied as not reasonable and necessary<\/td>\n<td style=\"padding:12px 16px;color:#374151\">When no ABN was obtained but the item is expected to be non-covered<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">NU<\/td>\n<td style=\"padding:12px 16px;color:#374151\">New equipment<\/td>\n<td style=\"padding:12px 16px;color:#374151\">When billing for a newly purchased (not rented) DME accessory<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">RR<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Rental<\/td>\n<td style=\"padding:12px 16px;color:#374151\">When the supply or accessory is rented rather than purchased<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">Modifier applicability depends on payer-specific guidelines. Verify the correct modifier against the relevant MAC&#8217;s LCD and the payer&#8217;s billing manual before submission. Practices that streamline their practice billing processes typically build modifier checklists for each payer into their standard DME intake workflow.<\/p>\n\n\n\n<h2 id=\"h-related-hcpcs-codes-for-miscellaneous-dme-supplies\" class=\"wp-block-heading\">Related HCPCS codes for miscellaneous DME supplies<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A9900 sits within a broader ecosystem of HCPCS codes for DME supplies, accessories, and components. Before defaulting to A9900, check these commonly referenced codes in the A-series and E-series, including A9999 for stand-alone supplies with no code of their own.<\/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\">HCPCS 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 consider instead of A9900<\/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\">A9270<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Non-covered item or service<\/td>\n<td style=\"padding:12px 16px;color:#374151\">When the supply is explicitly non-covered but must appear on the claim for beneficiary billing purposes<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">A9999<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Miscellaneous DME supply or accessory, not otherwise specified<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Use instead of A9900 when the supply is a stand-alone item with no dedicated HCPCS code, not a component of an already-coded item<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">E1399<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Durable medical equipment, miscellaneous<\/td>\n<td style=\"padding:12px 16px;color:#374151\">When billing for a complete DME device rather than a supply or accessory 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\">A6199<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Alginate or other fiber gelling dressing, wound filler, sterile, per 6 inches<\/td>\n<td style=\"padding:12px 16px;color:#374151\">For sterile alginate wound-filler dressings, not a general wound-care catch-all<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">A4649<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Surgical supply, miscellaneous<\/td>\n<td style=\"padding:12px 16px;color:#374151\">For surgical\/medical supplies not described by a more specific A4xxx code<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">Practices managing a broad DME supply inventory benefit from structured coding reference systems. Linking supply items to their preferred HCPCS codes in a central reference reduces reliance on manual lookups and minimizes accidental use of A9900 when a specific code, or A9999, applies instead.<\/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>Confirm whether the item you&#8217;re billing is a component of an already-coded DME item (A9900) or a genuinely uncoded stand-alone supply (A9999). The two are not interchangeable, and some MACs deny claims that use the wrong one even when documentation is complete. Contact your MAC&#8217;s provider services team or review their published LCD index to confirm.<\/p>\n            <\/div>\n        <\/div>\n    \n\n\n<h2 class=\"wp-block-heading\">Related HCPCS codes<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/pabau.com\/procedure-codes\/hcpcs-code-a9270\/\">HCPCS code A9270 \u2014 Non-Covered Item or Service<\/a><\/li>\n\n\n<li><a href=\"https:\/\/pabau.com\/procedure-codes\/hcpcs-code-b4034\/\">HCPCS code B4034 \u2014 Enteral feeding supply kit, syringe fed, per<\/a><\/li>\n\n\n<li><a href=\"https:\/\/pabau.com\/procedure-codes\/hcpcs-code-b4035\/\">HCPCS code B4035 \u2014 Enteral feeding supply kit<\/a><\/li>\n\n\n<li><a href=\"https:\/\/pabau.com\/procedure-codes\/hcpcs-code-b4081\/\">HCPCS Code B4081 \u2014 Nasogastric tubing with stylet<\/a><\/li>\n<\/ul>\n\n\n\n<h2 id=\"h-conclusion\" class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For the intake and documentation side of that process, digital forms software like Pabau&#8217;s can help practices capture structured physician orders and medical necessity statements at the point of care, though DME suppliers billing Medicare Part B still need dedicated DME billing software for the coding and claims side itself.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If your practice handles broader insurance billing beyond DME, practice management software like Pabau brings claims and billing into one system. <a href=\"https:\/\/pabau.com\/book-demo\/\">Book a demo<\/a> to see it in action.<\/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>Billing lower extremity orthoses?<\/strong> The billing guide for <a href=\"https:\/\/pabau.com\/procedure-codes\/hcpcs-code-l2999\/\">L2999<\/a> covers the same specific-code-first documentation principle DME suppliers need for A9900.<\/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>Handling home health certifications?<\/strong> The <a href=\"https:\/\/pabau.com\/procedure-codes\/hcpcs-code-g0180\/\">G0180<\/a> billing guide walks through Medicare&#8217;s certification requirements for home health DME and services.<\/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 ostomy supplies?<\/strong> See the billing guide for <a href=\"https:\/\/pabau.com\/procedure-codes\/hcpcs-code-a4427\/\">A4427<\/a> for another example of a specific supply code that pre-empts a miscellaneous one.<\/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-1784537515064\"><h3 class=\"schema-faq-question\">What is HCPCS Code A9900?<\/h3> <p class=\"schema-faq-answer\">HCPCS Code A9900 is a Level II Healthcare Common Procedure Coding System code with the official CMS descriptor: \u00abMiscellaneous DME supply, accessory, and\/or service component of another HCPCS code.\u00bb It bills a supply, accessory, or service component tied to a DME item that is already billed under its own HCPCS code, not a stand-alone catch-all for items with no code at all. It sits within the A-series, which covers transportation, medical\/surgical supplies, and DME.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1784537515065\"><h3 class=\"schema-faq-question\">Is A9900 covered by Medicare?<\/h3> <p class=\"schema-faq-answer\">Medicare Part B does not have a nationally published fee schedule rate for HCPCS Code A9900, and Medicare Administrative Contractors typically deny A9900 claims under ANSI\/CARC reason code 97, treating the component as already included in the payment for the primary DME item. Separate reimbursement is the exception rather than the rule, and depends on the applicable Local Coverage Determination for the primary item.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1784537515066\"><h3 class=\"schema-faq-question\">When should you use A9900 instead of a specific HCPCS code?<\/h3> <p class=\"schema-faq-answer\">Use A9900 only when billing a supply, accessory, or service component that is part of a DME item already billed under its own HCPCS code, and only after confirming no more specific component code exists. If the component has its own code, use that instead. If the item is a genuinely stand-alone supply with no code of its own and no link to another coded item, HCPCS Code A9999 applies instead of A9900.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1784537515067\"><h3 class=\"schema-faq-question\">What documentation is required to support an A9900 claim?<\/h3> <p class=\"schema-faq-answer\">Required documentation typically includes a written physician order identifying the item and the relevant diagnosis, a medical necessity statement, a clear link to the primary DME item&#8217;s HCPCS code, proof of delivery, and a detailed item description with manufacturer and model information. Many payers also require a written explanation of why no more specific component code applies. Prior authorization documentation must also be included if the payer requires it.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1784537515068\"><h3 class=\"schema-faq-question\">Can A9900 be used with Medicaid?<\/h3> <p class=\"schema-faq-answer\">Medicaid coverage for A9900 varies by state. Each state Medicaid program sets its own DME coverage policies independently, and many treat components billed under A9900 as bundled into the primary item&#8217;s payment rather than separately reimbursable. Always verify with the relevant state Medicaid program before billing A9900 for a Medicaid beneficiary.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1784537515069\"><h3 class=\"schema-faq-question\">What is the difference between HCPCS Level I and Level II codes?<\/h3> <p class=\"schema-faq-answer\">HCPCS Level I codes are the AMA&#8217;s CPT codes, which cover physician services and procedures. HCPCS Level II codes are alphanumeric codes maintained by CMS and cover items CPT does not, including durable medical equipment, supplies, ambulance services, and prosthetics. A9900 is a HCPCS Level II code used for a component of an already-coded DME item, distinct from A9999, which covers genuinely uncoded stand-alone supplies. Level II codes are required for Medicare and Medicaid DME billing.<\/p> <\/div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>HCPCS code A9900 is a Level II code CMS defines as a miscellaneous DME supply, accessory, and\/or service component of another HCPCS code. It bills a component tied to durable medical equipment that already has its own code, not a stand-alone item. Confusing it with HCPCS code A9999, the true miscellaneous catch-all, is the most [&hellip;]<\/p>\n","protected":false},"author":77,"featured_media":159068,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_linkdex":"91","_yoast_wpseo_content_score":"60","_yoast_wpseo_is_cornerstone":"","_yoast_wpseo_keywordsynonyms":"[\"\",\"\",\"\",\"\",\"\",\"\"]","_yoast_wpseo_focuskw_text_input":"","_seo_original_html":"","footnotes":""},"categories":[1433,1548],"tags":[1606,2948,1619,4259,1611,1609,2949,3044],"class_list":["post-159069","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-billing-codes","category-hcpcs","tag-dme-billing","tag-dme-codes","tag-hcpcs-billing","tag-hcpcs-code-a9900","tag-hcpcs-codes","tag-medicare-dme","tag-medicare-hcpcs-codes","tag-medicare-part-b"],"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>HCPCS Code A9900: Why Medicare Denies It Under CARC 97<\/title>\n<meta name=\"description\" content=\"HCPCS code A9900 bills a DME component tied to an already-coded item, and Medicare usually denies it as bundled under CARC 97.\" \/>\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\/es\/procedure-codes\/hcpcs-code-a9900\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HCPCS Code A9900: Why Medicare Denies It Under CARC 97\" \/>\n<meta property=\"og:description\" content=\"HCPCS code A9900 bills a DME component tied to an already-coded item, and Medicare usually denies it as bundled under CARC 97.\" \/>\n<meta property=\"og:url\" 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is an all-in-one healthcare practice management software platform designed for clinics, medspas, therapists, and medical professionals. 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\\\/es\\\/#\\\/schema\\\/person\\\/5de22f4ff3ec59b1925ef02dce956d7d\",\"name\":\"Katy Piper\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\\\/\\\/pabau.com\\\/wp-content\\\/uploads\\\/2026\\\/03\\\/cropped-Snip20260306_177-96x96.png\",\"url\":\"https:\\\/\\\/pabau.com\\\/wp-content\\\/uploads\\\/2026\\\/03\\\/cropped-Snip20260306_177-96x96.png\",\"contentUrl\":\"https:\\\/\\\/pabau.com\\\/wp-content\\\/uploads\\\/2026\\\/03\\\/cropped-Snip20260306_177-96x96.png\",\"caption\":\"Katy Piper\"},\"description\":\"Katy Piper is a content writer covering aesthetics, dermatology, and clinic operations, with a knack for making clinical detail feel approachable. 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\\\/hcpcs-code-a9900\\\/#faq-question-1784537515064\",\"position\":1,\"url\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/hcpcs-code-a9900\\\/#faq-question-1784537515064\",\"name\":\"What is HCPCS Code A9900?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"HCPCS Code A9900 is a Level II Healthcare Common Procedure Coding System code with the official CMS descriptor: \\\"Miscellaneous DME supply, accessory, and\\\/or service component of another HCPCS code.\\\" It bills a supply, accessory, or service component tied to a DME item that is already billed under its own HCPCS code, not a stand-alone catch-all for items with no code at all. It sits within the A-series, which covers transportation, medical\\\/surgical supplies, and DME.\",\"inLanguage\":\"es\"},\"inLanguage\":\"es\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/hcpcs-code-a9900\\\/#faq-question-1784537515065\",\"position\":2,\"url\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/hcpcs-code-a9900\\\/#faq-question-1784537515065\",\"name\":\"Is A9900 covered by Medicare?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Medicare Part B does not have a nationally published fee schedule rate for HCPCS Code A9900, and Medicare Administrative Contractors typically deny A9900 claims under ANSI\\\/CARC reason code 97, treating the component as already included in the payment for the primary DME item. Separate reimbursement is the exception rather than the rule, and depends on the applicable Local Coverage Determination for the primary item.\",\"inLanguage\":\"es\"},\"inLanguage\":\"es\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/hcpcs-code-a9900\\\/#faq-question-1784537515066\",\"position\":3,\"url\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/hcpcs-code-a9900\\\/#faq-question-1784537515066\",\"name\":\"When should you use A9900 instead of a specific HCPCS code?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Use A9900 only when billing a supply, accessory, or service component that is part of a DME item already billed under its own HCPCS code, and only after confirming no more specific component code exists. If the component has its own code, use that instead. If the item is a genuinely stand-alone supply with no code of its own and no link to another coded item, HCPCS Code A9999 applies instead of A9900.\",\"inLanguage\":\"es\"},\"inLanguage\":\"es\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/hcpcs-code-a9900\\\/#faq-question-1784537515067\",\"position\":4,\"url\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/hcpcs-code-a9900\\\/#faq-question-1784537515067\",\"name\":\"What documentation is required to support an A9900 claim?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Required documentation typically includes a written physician order identifying the item and the relevant diagnosis, a medical necessity statement, a clear link to the primary DME item's HCPCS code, proof of delivery, and a detailed item description with manufacturer and model information. Many payers also require a written explanation of why no more specific component code applies. Prior authorization documentation must also be included if the payer requires it.\",\"inLanguage\":\"es\"},\"inLanguage\":\"es\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/hcpcs-code-a9900\\\/#faq-question-1784537515068\",\"position\":5,\"url\":\"https:\\\/\\\/pabau.com\\\/es\\\/procedure-codes\\\/hcpcs-code-a9900\\\/#faq-question-1784537515068\",\"name\":\"Can A9900 be used with Medicaid?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Medicaid coverage for A9900 varies by state. Each state Medicaid program sets its own DME coverage policies independently, and many treat components billed under A9900 as bundled into the primary item's payment rather than separately reimbursable. 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It sits within the A-series, which covers transportation, medical\/surgical supplies, and DME.","inLanguage":"es"},"inLanguage":"es"},{"@type":"Question","@id":"https:\/\/pabau.com\/es\/procedure-codes\/hcpcs-code-a9900\/#faq-question-1784537515065","position":2,"url":"https:\/\/pabau.com\/es\/procedure-codes\/hcpcs-code-a9900\/#faq-question-1784537515065","name":"Is A9900 covered by Medicare?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Medicare Part B does not have a nationally published fee schedule rate for HCPCS Code A9900, and Medicare Administrative Contractors typically deny A9900 claims under ANSI\/CARC reason code 97, treating the component as already included in the payment for the primary DME item. Separate reimbursement is the exception rather than the rule, and depends on the applicable Local Coverage Determination for the primary item.","inLanguage":"es"},"inLanguage":"es"},{"@type":"Question","@id":"https:\/\/pabau.com\/es\/procedure-codes\/hcpcs-code-a9900\/#faq-question-1784537515066","position":3,"url":"https:\/\/pabau.com\/es\/procedure-codes\/hcpcs-code-a9900\/#faq-question-1784537515066","name":"When should you use A9900 instead of a specific HCPCS code?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Use A9900 only when billing a supply, accessory, or service component that is part of a DME item already billed under its own HCPCS code, and only after confirming no more specific component code exists. If the component has its own code, use that instead. If the item is a genuinely stand-alone supply with no code of its own and no link to another coded item, HCPCS Code A9999 applies instead of A9900.","inLanguage":"es"},"inLanguage":"es"},{"@type":"Question","@id":"https:\/\/pabau.com\/es\/procedure-codes\/hcpcs-code-a9900\/#faq-question-1784537515067","position":4,"url":"https:\/\/pabau.com\/es\/procedure-codes\/hcpcs-code-a9900\/#faq-question-1784537515067","name":"What documentation is required to support an A9900 claim?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Required documentation typically includes a written physician order identifying the item and the relevant diagnosis, a medical necessity statement, a clear link to the primary DME item's HCPCS code, proof of delivery, and a detailed item description with manufacturer and model information. Many payers also require a written explanation of why no more specific component code applies. Prior authorization documentation must also be included if the payer requires it.","inLanguage":"es"},"inLanguage":"es"},{"@type":"Question","@id":"https:\/\/pabau.com\/es\/procedure-codes\/hcpcs-code-a9900\/#faq-question-1784537515068","position":5,"url":"https:\/\/pabau.com\/es\/procedure-codes\/hcpcs-code-a9900\/#faq-question-1784537515068","name":"Can A9900 be used with Medicaid?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Medicaid coverage for A9900 varies by state. Each state Medicaid program sets its own DME coverage policies independently, and many treat components billed under A9900 as bundled into the primary item's payment rather than separately reimbursable. 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