{"id":170745,"date":"2026-07-31T13:52:39","date_gmt":"2026-07-31T13:52:39","guid":{"rendered":"https:\/\/pabau.com\/?p=170745"},"modified":"2026-08-17T11:42:16","modified_gmt":"2026-08-17T11:42:16","slug":"hcpcs-code-a4450","status":"publish","type":"post","link":"https:\/\/pabau.com\/fr\/procedure-codes\/hcpcs-code-a4450\/","title":{"rendered":"HCPCS code A4450: Tape, non-waterproof, per 18 square inches"},"content":{"rendered":"\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"MedicalWebPage\",\"headline\":\"HCPCS code A4450: Tape, non-waterproof, per 18 square inches\",\"description\":\"HCPCS Code A4450 (Tape, non-waterproof, per 18 square inches) billing guide covering Medicare fee schedule, payer coverage, coding guidelines, and documentation requirements.\",\"url\":\"https:\/\/pabau.com\/procedure-codes\/hcpcs-code-a4450\/\",\"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\":\"2026-01-01\",\"dateModified\":\"2026-01-01\"}<\/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 A4450 covers non-waterproof medical tape, billed per 18 square inches under Section A of HCPCS Level II.<\/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>One unit equals 18 square inches, so measure the tape you apply and divide the total area by 18.<\/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>Only enrolled Medicare DME suppliers can bill A4450 under Part B, and the record must justify the quantity.<\/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>Medicaid coverage varies by state, so check the state policy before you submit an A4450 claim.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#3D3D46\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p>Practice management software like Pabau ties supply dispensing to the patient record, so billed units match the documentation.<\/p>\n                        <\/div>\n                                                <\/div>\n        <\/div>\n    \n\n\n<p class=\"wp-block-paragraph\">HCPCS code A4450 covers non-waterproof medical tape, billed at one unit per 18 square inches. It belongs to Section A of the HCPCS Level II code set, the section that holds medical and surgical supplies. Waterproof tape has its own code, A4452, and the two are not interchangeable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Almost every A4450 denial traces back to the unit math or a record that never says how much tape went on. This guide covers the descriptor, the unit calculation, what Medicare pays, payer-by-payer coverage, and the documentation an audit asks for.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Official descriptor and classification<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HCPCS code A4450 is maintained by the <a href=\"https:\/\/www.cms.gov\/medicare\/coding-billing\/healthcare-common-procedure-system\" target=\"_blank\" rel=\"nofollow noopener\">Centers for Medicare and Medicaid Services (CMS)<\/a> as part of the HCPCS Level II national code set. Its official long description reads: <strong>Tape, non-waterproof, per 18 square inches.<\/strong> The code sits in Section A, which covers medical and surgical supplies. That puts it next to the other disposable supply codes a DME supplier bills.<\/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\">A4450<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Long description<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Tape, non-waterproof, per 18 square inches<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Short description<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Tape, non-waterproof per 18 sq in<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">HCPCS level<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Level II<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Section<\/td>\n<td style=\"padding:12px 16px;color:#374151\">A &#8211; Medical and Surgical Supplies<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Unit of measure<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Per 18 square inches<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Code type<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Permanent national code<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<h2 class=\"wp-block-heading\">Clinical uses in wound care and ostomy billing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Non-waterproof tape gets billed in two main contexts: wound dressing securement and ostomy care. A4450 covers both, provided the tape is not waterproof. The same supply turns up in sports medicine practices after minor procedures, and in the dressing kits home health suppliers send out.<\/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-a4450\/automate-claims-through-healthcode.webp\" alt=\"Pabau claims management dashboard listing submitted claims\"\/><figcaption class=\"wp-element-caption\"><em>Pabau&rsquo;s claims management sends supply lines like A4450 from the treatment record, so billed units match what the clinician documented.<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:35px;width:800px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n\n\n<h3 class=\"wp-block-heading\">Securing wound dressings<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">In wound care, A4450 bills the non-waterproof tape that holds a dressing in place. Typical scenarios include surgical wound aftercare, chronic wound management, and post-procedure dressing changes. On a larger claim the tape often sits beside a wound preparation code such as 15005.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Your patient documentation has to record wound dimensions, the type and amount of tape applied, and the treating clinician&rsquo;s order. That is what supports medical necessity when Medicare reviews the claim.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tape used to secure primary and secondary wound dressings<\/li>\n<li>Post-surgical incision dressing securement<\/li>\n<li>Chronic wound management (pressure injuries, diabetic foot ulcers)<\/li>\n<li>Dressing changes in home health or DME supplier supply kits<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Ostomy barriers and pouching systems<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A4450 also applies in ostomy billing, where non-waterproof tape secures barriers or pouching system components. Coverage for ostomy supplies under Part B is governed by CMS Ostomy Policy Article A52487. The claim has to show the tape is medically necessary for that patient&rsquo;s ostomy management. It also has to show the supply is not already paid for under another line item. Ostomy claims are a frequent audit target.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Medicare fee schedule and reimbursement rates<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Medicare reimburses A4450 under the DMEPOS fee schedule, administered by the Durable Medical Equipment Medicare Administrative Contractors (DME MACs). Rates vary by geographic locality. Check current rates against the <a href=\"https:\/\/www.cms.gov\/medicare\/payment\/fee-schedules\/dmepos\" target=\"_blank\" rel=\"nofollow noopener\">CMS DMEPOS fee schedule<\/a>, which is updated annually. The table below sets out the rate structure rather than dollar amounts, because those change.<\/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\">Rate type<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Notes<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">National rate<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Set annually by CMS. Verify it against the DMEPOS fee schedule.<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Locality adjustment<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Rates vary by geographic locality. Rural and urban rates can differ.<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Billing unit<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Per 18 square inches. Submit one unit for each 18 sq in used.<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Supplier requirement<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Only enrolled Medicare DME suppliers can bill A4450 under Part B.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n        <div id=\"pro_tip\">\n            <div class=\"img\">\n                <svg width=\"42\" height=\"42\" viewBox=\"0 0 42 42\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                    <path fill-rule=\"evenodd\" clip-rule=\"evenodd\"\n                        d=\"M12.6383 19.5238C12.6632 21.2071 12.8734 22.9926 12.0685 24.5523C11.0341 26.8917 8.45076 28.169 7.56292 30.5918C6.63082 33.1061 7.19505 36.185 9.31371 37.9786C10.929 39.5678 13.4183 39.9873 15.6061 39.5463C17.4592 39.073 19.1049 37.8388 19.9706 36.1608C20.781 34.7141 20.7866 32.9904 20.5293 31.3985C20.1006 29.3092 18.3775 27.8705 16.9807 26.362C14.8814 24.1005 14.6684 20.6854 15.595 17.8915C16.4331 15.4768 19.0026 14.2344 20.0425 11.9461C20.7202 10.6769 20.7506 9.20327 20.6068 7.81304C20.1864 5.40098 18.3139 3.23631 15.8716 2.56674C13.9742 2.03969 11.8224 2.30052 10.1739 3.37614C8.70522 4.34688 7.5878 5.86618 7.28356 7.58178C6.76081 9.82981 7.53525 12.2822 9.20307 13.9118C10.7658 15.4741 12.4806 17.2273 12.6383 19.5238Z\"\n                        fill=\"#2BADD4\" \/>\n                    <path fill-rule=\"evenodd\" clip-rule=\"evenodd\"\n                        d=\"M22.7048 19.8387C22.6822 22.3279 24.4507 24.6234 26.7493 25.4682C28.0531 25.961 29.4725 25.9183 30.7989 25.5487C32.0575 24.9955 33.301 24.2237 34.0069 23.0092C34.8384 21.5811 35.2982 19.8286 34.7832 18.2094C34.3611 16.2507 32.8739 14.6541 31.0275 13.9426C28.6736 12.9595 25.8073 13.7942 24.1719 15.7001C23.2022 16.8366 22.6143 18.3326 22.7048 19.8387Z\"\n                        fill=\"#2BADD4\" \/>\n                <\/svg>\n            <\/div>\n            <div class=\"text\">\n                <h3>Pro Tip<\/h3>\n                <p>Pull current A4450 rates from the CMS DMEPOS fee schedule rather than a third-party rate database. Rates change each January 1 and can be adjusted mid-year. Build a quarterly rate check into your billing calendar.<\/p>\n            <\/div>\n        <\/div>\n    \n\n\n<h2 class=\"wp-block-heading\">Payer coverage and Medicaid considerations<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Coverage for A4450 extends beyond Medicare, but the rules differ by payer type. Read each payer&rsquo;s policy on its own terms rather than assuming Medicare rules carry across. Billing that runs off the clinical record helps here. <\/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\">Payer type<\/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\">Coverage status<\/th>\n<th style=\"background:#121D36;color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:14px;letter-spacing:0.3px;border-bottom:2px solid #2BADD4\">Key notes<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Medicare Part B<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Covered (with conditions)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">DME supplier enrollment and medical necessity documentation both required.<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Medicaid<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Varies by state<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Some states cover A4450 in ostomy or wound care benefit packages. Verify the state policy.<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Commercial payers<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Plan-specific<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Prior authorization may be required. Check the plan&rsquo;s benefit documents.<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Medicare Advantage<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Typically follows Part B<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Plans may add coverage criteria of their own. Verify with each plan.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<h2 class=\"wp-block-heading\">Billing guidelines and coding requirements<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Getting an A4450 claim right comes down to three things.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Correct unit calculation<\/li>\n<li>Proper claim form completion<\/li>\n<li>Complete medical necessity documentation<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">An error in any one of them can trigger a denial or an audit request. Supply codes punish loose unit math faster than most areas of medical billing.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How to calculate units for A4450<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A4450 is billed per 18 square inches of non-waterproof tape used. Here is the calculation, worked through with numbers you can copy at the desk.<\/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\">Step<\/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\">Action<\/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\">Example<\/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\">1<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Measure total tape area used (length x width in inches)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">6 in x 9 in = 54 sq in<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">2<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Divide total area by 18 sq in per unit<\/td>\n<td style=\"padding:12px 16px;color:#374151\">54 \/ 18 = 3 units<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">3<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Round partial units according to the payer&rsquo;s own policy<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Confirm the rule for 3.4 units with your DME MAC<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">4<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Enter units in Box 24G of CMS-1500 (or equivalent EDI field)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Bill 3 units of A4450<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">5<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Document tape dimensions in the medical record<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Record \u00ab\u00a054 sq in non-waterproof tape applied to wound\u00a0\u00bb<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">Rounding conventions vary, so confirm the unit rules with the relevant DME MAC or payer. Check the current National Correct Coding Initiative (NCCI) edits before you add a modifier to an A4450 claim. <\/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-a4450\/customizable-consent-and-intake-forms.webp\" alt=\"Customizable consent and intake form builder in Pabau\"\/><figcaption class=\"wp-element-caption\"><em>Pabau&rsquo;s customizable intake forms capture tape dimensions at the point of care, so the unit count is documented before the claim goes out.<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:35px;width:800px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">A4450 vs A4452: key differences<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The most common coding error with A4450 is reaching for it when A4452 applies. Payers track utilization patterns, and they question claims where the tape type does not match the clinical picture. Waterproof tape is indicated for high-moisture wound environments, or for patients who shower with a dressing in place. A dermatology practice sending someone home to shower over a fresh dressing bills A4452, not A4450.<\/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\">A4450<\/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\">A4452<\/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\">Official description<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Tape, non-waterproof, per 18 sq in<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Tape, waterproof, per 18 sq in<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Tape type<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Non-waterproof<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Waterproof<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Typical clinical use<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Standard wound dressing securement, dry environments<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Moist wound environments, patients who shower with dressings<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Ostomy use<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Yes (non-waterproof barrier tape)<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Yes (waterproof barrier tape)<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">Unit of measure<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Per 18 square inches<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Per 18 square inches<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<h2 class=\"wp-block-heading\">Related and adjacent HCPCS codes<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A4450 sits in a cluster of wound care and ostomy supply codes. Billers reach for these adjacent codes when they build the supply lines on a claim. Verify current descriptions and effective dates with the <a href=\"https:\/\/www.aapc.com\/codes\/hcpcs-codes-range\/\" target=\"_blank\" rel=\"nofollow noopener\">AAPC HCPCS lookup<\/a> before you bill. Closure done with tissue adhesive alone is a separate matter.<\/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\">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\">Distinguishing note<\/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\">A4450<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Tape, non-waterproof, per 18 sq in<\/td>\n<td style=\"padding:12px 16px;color:#374151\">This code; non-waterproof tape only<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">A4452<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Tape, waterproof, per 18 sq in<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Waterproof variant; not interchangeable with A4450<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">A4456<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Adhesive remover, wipes, any type, each<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Often billed alongside A4450 in ostomy care<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0;background:#F9FAFB\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">A6216<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Gauze, non-impregnated, non-sterile, pad size 16 sq in or less<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Often billed with A4450 for wound dressing kits<\/td>\n<\/tr>\n<tr style=\"border-bottom:1px solid #E8ECF0\">\n<td style=\"padding:12px 16px;font-weight:600;color:#121D36\">A6217<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Gauze, non-impregnated, non-sterile, pad size more than 16 sq in but less than or equal to 48 sq in<\/td>\n<td style=\"padding:12px 16px;color:#374151\">Larger gauze companion code to A4450<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<h2 class=\"wp-block-heading\">Documentation that survives a DME audit<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Documentation for an A4450 claim has to address medical necessity in plain terms. DME MAC audits focus on whether the record supports the type and quantity of tape billed. Thin documentation is the usual reason a supply claim lands in post-payment review.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tracking <a href=\"https:\/\/pabau.com\/features\/inventory-management-software\/\">supply inventory<\/a> at the practice level makes dispensing records easy to pull when an audit request arrives. <\/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-a4450\/barcode-scanning.webp\" alt=\"Barcode scanning of stock items in Pabau inventory\"\/><figcaption class=\"wp-element-caption\"><em>Pabau&rsquo;s barcode scanning logs each dressing supply as it leaves the shelf, giving you a dispensing record to produce when an auditor asks.<\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:35px;width:800px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Physician\/clinician order:<\/strong> include a written or electronic order specifying non-waterproof tape, quantity, and frequency<\/li>\n<li><strong>Medical necessity statement:<\/strong> document the clinical reason the supply is needed (wound type, ostomy diagnosis, or relevant ICD-10 code)<\/li>\n<li><strong>Quantity justification:<\/strong> record the dimensions of tape used per application to support unit count billed<\/li>\n<li><strong>Supplier enrollment:<\/strong> confirm the billing supplier holds an active Medicare DME supplier number<\/li>\n<li><strong>Delivery confirmation:<\/strong> keep proof of delivery or dispensing records, which Medicare can request during a claim review<\/li>\n<li><strong>Code effective date:<\/strong> check that A4450 is still active in the current CMS HCPCS annual update before billing<\/li>\n<\/ul>\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>Flag A4450 claims for a pre-submission documentation check whenever the unit count passes five on a single line. High unit counts draw extra scrutiny from DME MAC reviewers. Reading the dispensing record once before submission is usually enough to head off a denial.<\/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-a0427-als-emergency-ambulance-transport\/\">HCPCS code A0427 \u2014 ALS Emergency Ambulance Transport<\/a><\/li>\n\n\n<li><a href=\"https:\/\/pabau.com\/procedure-codes\/hcpcs-code-a4452\/\">HCPCS code A4452 \u2014 Waterproof tape<\/a><\/li>\n\n\n<li><a href=\"https:\/\/pabau.com\/procedure-codes\/hcpcs-code-a0100\/\">HCPCS code A0100 \u2014 Non-emergency transportation; taxi<\/a><\/li>\n\n\n<li><a href=\"https:\/\/pabau.com\/procedure-codes\/hcpcs-code-a0426\/\">HCPCS Code A0426 \u2014 ALS1 Ambulance Transport<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How Pabau keeps supply billing and documentation in step<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">In most practices the tape comes off a shelf and the clinician writes a note. A biller then rebuilds the unit count from whatever that note happens to say. Dimensions get left out, so the units on the claim end up as an estimate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Practice management software like Pabau closes that loop. Intake and treatment forms capture tape dimensions while the clinician is still with the patient. Inventory tracking logs the supply against that patient&rsquo;s record as it is dispensed, rather than at the end of the week.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">By the time the claim is built, the unit count, the clinician&rsquo;s order and the dispensing record all point at the same number. <\/p>\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                    Bill supply codes from the clinical record                <\/h3>\n\n                <p class=\"description\">\n                    Pabau&rsquo;s claims management tools help wound care practices and DME suppliers track supply codes, keep unit counts accurate, and stay ready for an audit.                <\/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 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A4450 is a small line on a claim, which is exactly why it gets billed carelessly. Fix the measuring habit and most of the denial risk goes with it. Write the dimensions in the note, divide by 18, and settle the rounding rule once with your DME MAC.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The trade-off worth remembering is that A4450 rarely pays enough to justify an appeal. Rework costs more than the reimbursement, so the only economical version of this code is the one billed correctly the first time.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/pabau.com\/book-demo\/\">Book a demo<\/a> to see how Pabau keeps supply dispensing, documentation and claim submission on one record.<\/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 another Section A supply code?<\/strong> <a href=\"https:\/\/pabau.com\/procedure-codes\/hcpcs-code-a4565\/\">A4565<\/a> sets out the unit rules and documentation for slings, which land on the same kind of supply claim.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#54B2D3\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p><strong>Need the wound preparation code that sits beside a dressing supply?<\/strong> <a href=\"https:\/\/pabau.com\/procedure-codes\/cpt-code-15004\/\">15004<\/a> explains how the surgical preparation add-on is reported.<\/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>Supplying durable equipment as well as dressings?<\/strong> <a href=\"https:\/\/pabau.com\/procedure-codes\/hcpcs-code-e0275\/\">E0275<\/a> walks through how a standard DME item is billed and documented under Part B.<\/p>\n                        <\/div>\n                                                                                <div class=\"item\">\n                            <div>\n                                <svg width=\"20\" height=\"27\" viewBox=\"0 0 20 27\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n                                    <path\n                                        d=\"M18.6223 14.3857C19.1246 13.8975 19.1246 13.1045 18.6223 12.6162L12.1938 6.36621C11.6915 5.87793 10.8759 5.87793 10.3737 6.36621C9.87143 6.85449 9.87143 7.64746 10.3737 8.13574L14.6125 12.2529H2.28571C1.57455 12.2529 1 12.8115 1 13.5029C1 14.1943 1.57455 14.7529 2.28571 14.7529H14.6085L10.3777 18.8701C9.87545 19.3584 9.87545 20.1514 10.3777 20.6396C10.8799 21.1279 11.6955 21.1279 12.1978 20.6396L18.6263 14.3896L18.6223 14.3857Z\"\n                                        fill=\"#54B2D3\" \/>\n                                <\/svg>\n                            <\/div>\n                            <p><strong>Billing a wound care device rather than a supply?<\/strong> <a href=\"https:\/\/pabau.com\/procedure-codes\/hcpcs-code-e0231\/\">E0231<\/a> covers the coverage criteria and the paperwork reviewers ask for.<\/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>Wondering how long to keep the records behind a supply claim?<\/strong> <a href=\"https:\/\/pabau.com\/blog\/how-long-to-keep-medical-records\/\">Medical record retention rules<\/a> breaks the requirements down state by state.<\/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-1785497208691\"><h3 class=\"schema-faq-question\">What is HCPCS Code A4450 used for?<\/h3> <p class=\"schema-faq-answer\">HCPCS Code A4450 is used to bill for non-waterproof medical tape provided to patients, billed per 18 square inches. It is most commonly used in wound care and ostomy supply billing under Medicare Part B and Medicaid. The tape secures wound dressings or ostomy pouching system components.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1785497208692\"><h3 class=\"schema-faq-question\">How is A4450 billed: per roll or per 18 square inches?<\/h3> <p class=\"schema-faq-answer\">A4450 is billed per 18 square inches, not per roll. Calculate the total area of tape used (length x width in inches), then divide by 18 to determine the number of billable units. Document the tape dimensions in the patient record to support the unit count submitted.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1785497208693\"><h3 class=\"schema-faq-question\">What is the difference between A4450 and A4452?<\/h3> <p class=\"schema-faq-answer\">A4450 covers non-waterproof tape. A4452 covers waterproof tape. Both are billed per 18 square inches, but they are not interchangeable. Billing A4450 when waterproof tape was actually provided (or vice versa) constitutes a coding error and can trigger claim denials or audit findings.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1785497208694\"><h3 class=\"schema-faq-question\">Is A4450 covered under Medicaid?<\/h3> <p class=\"schema-faq-answer\">Medicaid coverage for A4450 varies by state. Some state Medicaid programs include it in wound care or ostomy supply benefit packages. Others do not. Always verify coverage with the state Medicaid agency or managed care plan before billing. Do not assume that Medicare coverage rules apply to Medicaid claims.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1785497208695\"><h3 class=\"schema-faq-question\">Which payers reimburse HCPCS A4450?<\/h3> <p class=\"schema-faq-answer\">Medicare Part B reimburses A4450 through the DME fee schedule when billed by an enrolled DME supplier with documented medical necessity. Medicare Advantage plans typically follow Part B coverage with possible additional criteria. Commercial payers and Medicaid are plan-specific or state-specific. Verify coverage with each payer individually.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1785497208696\"><h3 class=\"schema-faq-question\">Can A4450 be billed for both wound care and ostomy supplies?<\/h3> <p class=\"schema-faq-answer\">Yes. HCPCS Code A4450 is used in both wound care and ostomy billing contexts. In wound care, it covers non-waterproof tape securing wound dressings. In ostomy care, it covers non-waterproof tape used with ostomy barriers and pouching systems. Ensure the clinical documentation reflects the specific use to support the claim.<\/p> <\/div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>HCPCS code A4450 covers non-waterproof medical tape, billed at one unit per 18 square inches. It belongs to Section A of the HCPCS Level II code set, the section that holds medical and surgical supplies. Waterproof tape has its own code, A4452, and the two are not interchangeable. Almost every A4450 denial traces back to [&hellip;]<\/p>\n","protected":false},"author":81,"featured_media":170743,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_linkdex":"","_yoast_wpseo_content_score":"90","_yoast_wpseo_is_cornerstone":"","_yoast_wpseo_keywordsynonyms":"","_yoast_wpseo_focuskw_text_input":"","_seo_original_html":"","footnotes":""},"categories":[1433,1548],"tags":[1606,1582,2278,2535],"class_list":["post-170745","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-billing-codes","category-hcpcs","tag-dme-billing","tag-hcpcs","tag-wound-care","tag-wound-care-documentation"],"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 A4450: how to bill non-waterproof tape units<\/title>\n<meta name=\"description\" content=\"A4450 covers non-waterproof tape at one unit per 18 square inches. Get the unit math, coverage rules and audit documentation right.\" \/>\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\/fr\/procedure-codes\/hcpcs-code-a4450\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HCPCS code A4450: how to bill non-waterproof tape units\" \/>\n<meta property=\"og:description\" content=\"A4450 covers non-waterproof tape at one unit per 18 square inches. Get the unit math, coverage rules and audit documentation right.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/pabau.com\/fr\/procedure-codes\/hcpcs-code-a4450\/\" \/>\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=\"2026-07-31T13:52:39+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-08-17T11:42:16+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/pabau.com\/wp-content\/uploads\/2026\/07\/hcpcs-code-a4450.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=\"Aleksandar Kochovski\" \/>\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=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Aleksandar Kochovski\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/pabau.com\\\/fr\\\/procedure-codes\\\/hcpcs-code-a4450\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/fr\\\/procedure-codes\\\/hcpcs-code-a4450\\\/\"},\"author\":{\"name\":\"Aleksandar Kochovski\",\"@id\":\"https:\\\/\\\/pabau.com\\\/fr\\\/#\\\/schema\\\/person\\\/73b672a49e20bfba8161e3c17ee3dda2\"},\"headline\":\"HCPCS code A4450: Tape, non-waterproof, per 18 square inches\",\"datePublished\":\"2026-07-31T13:52:39+00:00\",\"dateModified\":\"2026-08-17T11:42:16+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/fr\\\/procedure-codes\\\/hcpcs-code-a4450\\\/\"},\"wordCount\":1921,\"publisher\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/fr\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/fr\\\/procedure-codes\\\/hcpcs-code-a4450\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/pabau.com\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/hcpcs-code-a4450.webp\",\"keywords\":[\"Dme Billing\",\"Hcpcs\",\"Wound care\",\"Wound care documentation\"],\"articleSection\":[\"Billing Codes\",\"HCPCS\"],\"inLanguage\":\"fr-FR\"},{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\\\/\\\/pabau.com\\\/fr\\\/procedure-codes\\\/hcpcs-code-a4450\\\/\",\"url\":\"https:\\\/\\\/pabau.com\\\/fr\\\/procedure-codes\\\/hcpcs-code-a4450\\\/\",\"name\":\"HCPCS code A4450: how to bill non-waterproof tape units\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/fr\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/fr\\\/procedure-codes\\\/hcpcs-code-a4450\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/pabau.com\\\/fr\\\/procedure-codes\\\/hcpcs-code-a4450\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/pabau.com\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/hcpcs-code-a4450.webp\",\"datePublished\":\"2026-07-31T13:52:39+00:00\",\"dateModified\":\"2026-08-17T11:42:16+00:00\",\"description\":\"A4450 covers non-waterproof tape at one unit per 18 square inches. 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It combines scheduling, electronic health records, clinical forms, payments, marketing automation, reporting, and patient engagement tools into one secure cloud system to help practices streamline operations and grow their business.\",\"foundingDate\":\"2011-10-20\",\"numberOfEmployees\":{\"@type\":\"QuantitativeValue\",\"minValue\":\"201\",\"maxValue\":\"500\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/pabau.com\\\/fr\\\/#\\\/schema\\\/person\\\/73b672a49e20bfba8161e3c17ee3dda2\",\"name\":\"Aleksandar Kochovski\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\\\/\\\/pabau.com\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/cropped-aleksandar-kochovski-profile-picture-96x96.jpeg\",\"url\":\"https:\\\/\\\/pabau.com\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/cropped-aleksandar-kochovski-profile-picture-96x96.jpeg\",\"contentUrl\":\"https:\\\/\\\/pabau.com\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/cropped-aleksandar-kochovski-profile-picture-96x96.jpeg\",\"caption\":\"Aleksandar Kochovski\"},\"description\":\"Aleksandar is a content strategist and editor working in tech publishing, with a background in higher education. He specializes in topics around compliance in software solutions. When he's not writing at Pabau, you can find him tending to his bonsai collection or hitting the gym.\",\"url\":\"https:\\\/\\\/pabau.com\\\/fr\\\/blog\\\/author\\\/aleksandar-kochovski\\\/\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/fr\\\/procedure-codes\\\/hcpcs-code-a4450\\\/#faq-question-1785497208691\",\"position\":1,\"url\":\"https:\\\/\\\/pabau.com\\\/fr\\\/procedure-codes\\\/hcpcs-code-a4450\\\/#faq-question-1785497208691\",\"name\":\"What is HCPCS Code A4450 used for?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"HCPCS Code A4450 is used to bill for non-waterproof medical tape provided to patients, billed per 18 square inches. It is most commonly used in wound care and ostomy supply billing under Medicare Part B and Medicaid. The tape secures wound dressings or ostomy pouching system components.\",\"inLanguage\":\"fr-FR\"},\"inLanguage\":\"fr-FR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/fr\\\/procedure-codes\\\/hcpcs-code-a4450\\\/#faq-question-1785497208692\",\"position\":2,\"url\":\"https:\\\/\\\/pabau.com\\\/fr\\\/procedure-codes\\\/hcpcs-code-a4450\\\/#faq-question-1785497208692\",\"name\":\"How is A4450 billed: per roll or per 18 square inches?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A4450 is billed per 18 square inches, not per roll. Calculate the total area of tape used (length x width in inches), then divide by 18 to determine the number of billable units. Document the tape dimensions in the patient record to support the unit count submitted.\",\"inLanguage\":\"fr-FR\"},\"inLanguage\":\"fr-FR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/fr\\\/procedure-codes\\\/hcpcs-code-a4450\\\/#faq-question-1785497208693\",\"position\":3,\"url\":\"https:\\\/\\\/pabau.com\\\/fr\\\/procedure-codes\\\/hcpcs-code-a4450\\\/#faq-question-1785497208693\",\"name\":\"What is the difference between A4450 and A4452?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A4450 covers non-waterproof tape. A4452 covers waterproof tape. Both are billed per 18 square inches, but they are not interchangeable. Billing A4450 when waterproof tape was actually provided (or vice versa) constitutes a coding error and can trigger claim denials or audit findings.\",\"inLanguage\":\"fr-FR\"},\"inLanguage\":\"fr-FR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/fr\\\/procedure-codes\\\/hcpcs-code-a4450\\\/#faq-question-1785497208694\",\"position\":4,\"url\":\"https:\\\/\\\/pabau.com\\\/fr\\\/procedure-codes\\\/hcpcs-code-a4450\\\/#faq-question-1785497208694\",\"name\":\"Is A4450 covered under Medicaid?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Medicaid coverage for A4450 varies by state. Some state Medicaid programs include it in wound care or ostomy supply benefit packages. Others do not. Always verify coverage with the state Medicaid agency or managed care plan before billing. Do not assume that Medicare coverage rules apply to Medicaid claims.\",\"inLanguage\":\"fr-FR\"},\"inLanguage\":\"fr-FR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pabau.com\\\/fr\\\/procedure-codes\\\/hcpcs-code-a4450\\\/#faq-question-1785497208695\",\"position\":5,\"url\":\"https:\\\/\\\/pabau.com\\\/fr\\\/procedure-codes\\\/hcpcs-code-a4450\\\/#faq-question-1785497208695\",\"name\":\"Which payers reimburse HCPCS A4450?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Medicare Part B reimburses A4450 through the DME fee schedule when billed by an enrolled DME supplier with documented medical necessity. Medicare Advantage plans typically follow Part B coverage with possible additional criteria. Commercial payers and Medicaid are plan-specific or state-specific. 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He specializes in topics around compliance in software solutions. When he's not writing at Pabau, you can find him tending to his bonsai collection or hitting the gym.","url":"https:\/\/pabau.com\/fr\/blog\/author\/aleksandar-kochovski\/"},{"@type":"Question","@id":"https:\/\/pabau.com\/fr\/procedure-codes\/hcpcs-code-a4450\/#faq-question-1785497208691","position":1,"url":"https:\/\/pabau.com\/fr\/procedure-codes\/hcpcs-code-a4450\/#faq-question-1785497208691","name":"What is HCPCS Code A4450 used for?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"HCPCS Code A4450 is used to bill for non-waterproof medical tape provided to patients, billed per 18 square inches. It is most commonly used in wound care and ostomy supply billing under Medicare Part B and Medicaid. The tape secures wound dressings or ostomy pouching system components.","inLanguage":"fr-FR"},"inLanguage":"fr-FR"},{"@type":"Question","@id":"https:\/\/pabau.com\/fr\/procedure-codes\/hcpcs-code-a4450\/#faq-question-1785497208692","position":2,"url":"https:\/\/pabau.com\/fr\/procedure-codes\/hcpcs-code-a4450\/#faq-question-1785497208692","name":"How is A4450 billed: per roll or per 18 square inches?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A4450 is billed per 18 square inches, not per roll. Calculate the total area of tape used (length x width in inches), then divide by 18 to determine the number of billable units. Document the tape dimensions in the patient record to support the unit count submitted.","inLanguage":"fr-FR"},"inLanguage":"fr-FR"},{"@type":"Question","@id":"https:\/\/pabau.com\/fr\/procedure-codes\/hcpcs-code-a4450\/#faq-question-1785497208693","position":3,"url":"https:\/\/pabau.com\/fr\/procedure-codes\/hcpcs-code-a4450\/#faq-question-1785497208693","name":"What is the difference between A4450 and A4452?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A4450 covers non-waterproof tape. A4452 covers waterproof tape. Both are billed per 18 square inches, but they are not interchangeable. Billing A4450 when waterproof tape was actually provided (or vice versa) constitutes a coding error and can trigger claim denials or audit findings.","inLanguage":"fr-FR"},"inLanguage":"fr-FR"},{"@type":"Question","@id":"https:\/\/pabau.com\/fr\/procedure-codes\/hcpcs-code-a4450\/#faq-question-1785497208694","position":4,"url":"https:\/\/pabau.com\/fr\/procedure-codes\/hcpcs-code-a4450\/#faq-question-1785497208694","name":"Is A4450 covered under Medicaid?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Medicaid coverage for A4450 varies by state. Some state Medicaid programs include it in wound care or ostomy supply benefit packages. Others do not. Always verify coverage with the state Medicaid agency or managed care plan before billing. Do not assume that Medicare coverage rules apply to Medicaid claims.","inLanguage":"fr-FR"},"inLanguage":"fr-FR"},{"@type":"Question","@id":"https:\/\/pabau.com\/fr\/procedure-codes\/hcpcs-code-a4450\/#faq-question-1785497208695","position":5,"url":"https:\/\/pabau.com\/fr\/procedure-codes\/hcpcs-code-a4450\/#faq-question-1785497208695","name":"Which payers reimburse HCPCS A4450?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Medicare Part B reimburses A4450 through the DME fee schedule when billed by an enrolled DME supplier with documented medical necessity. Medicare Advantage plans typically follow Part B coverage with possible additional criteria. Commercial payers and Medicaid are plan-specific or state-specific. Verify coverage with each payer individually.","inLanguage":"fr-FR"},"inLanguage":"fr-FR"},{"@type":"Question","@id":"https:\/\/pabau.com\/fr\/procedure-codes\/hcpcs-code-a4450\/#faq-question-1785497208696","position":6,"url":"https:\/\/pabau.com\/fr\/procedure-codes\/hcpcs-code-a4450\/#faq-question-1785497208696","name":"Can A4450 be billed for both wound care and ostomy supplies?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes. HCPCS Code A4450 is used in both wound care and ostomy billing contexts. In wound care, it covers non-waterproof tape securing wound dressings. In ostomy care, it covers non-waterproof tape used with ostomy barriers and pouching systems. Ensure the clinical documentation reflects the specific use to support the claim.","inLanguage":"fr-FR"},"inLanguage":"fr-FR"}]}},"yoast":{"focus_keyword":"HCPCS Code A4450","seo_title":"HCPCS code A4450: how to bill non-waterproof tape units","meta_description":"A4450 covers non-waterproof tape at one unit per 18 square inches. 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