A4407 — Ostomy skin barrier, with flange (solid, flexible, or accordion), extended wear, with built-in convexity, 4 x 4 inches or smaller, each
A4407 is a HCPCS Level II code for ostomy skin barrier, with flange (solid, flexible, or accordion), extended wear, with built-in convexity, 4 x 4 inches or smaller, each. It belongs to the Transportation, Medical & Surgical Supplies, Administrative section. Whether Medicare pays it depends on the coverage rule below.
Medicare coverage: Special coverage instructions apply
There are published conditions attached to this code. Check the applicable coverage policy before billing it: the code being valid is not the same as the service being covered.
From the coverage field of the CMS Alpha-Numeric HCPCS File, release 2026Q3-Jul. This states Medicare’s position on the code, not on your particular claim.
Physician fee schedule statusX
Statutory exclusion. The item or service is not within the statutory definition of 'physician services', so the fee schedule never pays it.
Global period: XXX
Want the dollar amount for your locality? The fee calculator applies your GPCI and the current conversion factor.
Medically Unlikely Edits — units per day
The most units of A4407 Medicare will pay on one date of service. Bill more on a single line and it is denied. The limit is not the same in every setting, so the row that matters is the one matching the claim you are building.
- practitioner
- 2 units MAI 3 — Date of Service Edit: Clinical · Clinical: CMS Workgroup
- outpatient
- 2 units MAI 3 — Date of Service Edit: Clinical · Clinical: CMS Workgroup
The adjudication indicator decides whether exceeding the limit is worth appealing at all: MAI 1 is a line edit you can support with documentation, MAI 3 is a date-of-service edit that is also appealable, and MAI 2 is absolute — no documentation overrides it. CMS MUE 2026Q3.
The CMS record for A4407
- Long descriptor
- Ostomy skin barrier, with flange (solid, flexible, or accordion), extended wear, with built-in convexity, 4 x 4 inches or smaller, each
- Short descriptor
- Ext wear ost skn barr <=4sq"
- Added
- January 1, 2003
- BETOS
- D1F
- Pricing indicator
- 37 — DMEPOS
The official wording. This is what the code means.
CMS's 28-character form, which is what shows up on a remittance advice.
When CMS introduced the code.
Berenson-Eggers Type of Service — CMS's own analytic grouping.
Ostomy, tracheostomy and urological supplies. Price subject to floors and ceilings.
Codes adjacent to A4407
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If A4407 is not quite right, the correct code is very often within a few positions of it.
- A4397Irrigation supply; sleeve, eachterminated
- A4398Ostomy irrigation supply; bag, each
- A4399Ostomy irrigation supply; cone/catheter, with or without brush
- A4400Ostomy irrigation set
- A4402Lubricant, per ounce
- A4404Ostomy ring, each
- A4405Ostomy skin barrier, non-pectin based, paste, per ounce
- A4406Ostomy skin barrier, pectin-based, paste, per ounce
- A4408Ostomy skin barrier, with flange (solid, flexible or accordion), extended wear, with built-in convexity, larger than 4 x 4 inches, each
- A4409Ostomy skin barrier, with flange (solid, flexible or accordion), extended wear, without built-in convexity, 4 x 4 inches or smaller, each
- A4410Ostomy skin barrier, with flange (solid, flexible or accordion), extended wear, without built-in convexity, larger than 4 x 4 inches, each
- A4411Ostomy skin barrier, solid 4 x 4 or equivalent, extended wear, with built-in convexity, each
- A4412Ostomy pouch, drainable, high output, for use on a barrier with flange (2 piece system), without filter, each
- A4413Ostomy pouch, drainable, high output, for use on a barrier with flange (2 piece system), with filter, each
- A4414Ostomy skin barrier, with flange (solid, flexible or accordion), without built-in convexity, 4 x 4 inches or smaller, each
- A4415Ostomy skin barrier, with flange (solid, flexible or accordion), without built-in convexity, larger than 4 x 4 inches, each
Questions about A4407
What is HCPCS code A4407?
A4407 is a HCPCS Level II code for ostomy skin barrier, with flange (solid, flexible, or accordion), extended wear, with built-in convexity, 4 x 4 inches or smaller, each. It sits in the Transportation, Medical & Surgical Supplies, Administrative section.
Does Medicare cover A4407?
The CMS HCPCS file marks A4407 as "Special coverage instructions apply". There are published conditions attached to this code. Check the applicable coverage policy before billing it: the code being valid is not the same as the service being covered.
How is A4407 paid under the physician fee schedule?
A4407 carries PFS status code X. Statutory exclusion. The item or service is not within the statutory definition of 'physician services', so the fee schedule never pays it.