A4575 HCPCS code: Topical hyperbaric oxygen chamber, disposable
A4575 is the HCPCS Level II code for topical hyperbaric oxygen chamber, disposable. Its Medicare coverage code is C (Carrier judgment): Coverage is decided by the Medicare contractor (MAC) case by case.
Code details
| Field | Value |
|---|---|
| Section | A codes — Transportation, medical/surgical supplies and miscellaneous |
| Coverage code | C — Carrier judgment |
| Pricing indicator | 00 — Not separately priced by Medicare |
| BETOS category | D1A — Medical/surgical supplies |
| Added | 1996-01-01 |
| Last action effective | 2017-10-01 |
Medicare policy articles for this code
- A56025: Billing and Coding: Topical HBO and Physician Related Service Billing and Coding Guidelines (Noridian Healthcare Solutions, LLC (MAC - Part A, MAC - Part B))
- A56431: Billing and Coding: Topical Oxygen Therapy (Palmetto GBA (MAC - Part A, MAC - Part B))
Covered diagnoses (1 ICD-10-CM codes)
The diagnoses most often listed as covered in the policy articles above:
| ICD-10-CM | Diagnosis | Articles listing it |
|---|---|---|
| XX000 | Not Applicable | 1 |
What changed for A4575
- 1996-01-01: A4575 added to HCPCS Level II
- Next scheduled CMS quarterly update (HCPCS and DMEPOS fee schedule): 2027-01-01
Frequently asked questions
What is HCPCS code A4575?
A4575 is the HCPCS Level II code for topical hyperbaric oxygen chamber, disposable. Short descriptor: "Hyperbaric o2 chamber disps".
Does Medicare cover A4575?
Coverage code C — Carrier judgment. Coverage is decided by the Medicare contractor (MAC) case by case.
Which diagnoses support coverage for A4575?
Medicare policy articles that cite A4575 list 1 covered ICD-10-CM diagnosis codes across 2 articles. The most cited include XX000 (Not Applicable). A listed diagnosis is necessary but not sufficient; the policy's other criteria still apply.
Related A45 codes
- A4500 — Surgical stockings below knee length, each
- A4510 — Surgical stockings full length, each
- A4520 — Incontinence garment, any type, (e.g., brief, diaper), each
- A4540 — Distal transcutaneous electrical nerve stimulator, stimulates peripheral nerves of the upper arm
- A4541 — Monthly supplies for use of device coded at e0733 ($40.40–$49.25)
- A4542 — Supplies and accessories for external upper limb tremor stimulator of the peripheral nerves of the wrist ($526.85–$526.85)
- A4543 — Supplies for transcutaneous electrical nerve stimulator, for nerves in the auricular region, per month
- A4544 — Electrode for external lower extremity nerve stimulator for restless legs syndrome ($6.34–$6.34)
- A4545 — Supplies and accessories for external tibial nerve stimulator (e.g., socks, gel pads, electrodes, etc.), needed for one month ($38.21–$55.51)
- A4550 — Surgical trays
- A4553 — Non-disposable underpads, all sizes
- A4554 — Disposable underpads, all sizes
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Next steps
- Run a reimbursement report for a device billed under A4575
- Watch A4575 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for A4575
Sources: CMS HCPCS Level II release October 2025; CMS DMEPOS fee schedule; CMS NCCI MUE tables; CMS Medicare utilization (physician and DME supplier files); CMS Medicare Coverage Database articles. Fees are Medicare allowables, not commercial rates. Not billing or legal advice.