A4373 — Ostomy skin barrier, with flange (solid, flexible or accordion), with built-in convexity, any size, each
HCPCS Level II A-code · short descriptor: “Skin barrier with flange”
- Code system
- HCPCS Level II
- Family
- A — Medical & surgical supplies, ambulance
- Medicare coverage status
- Special coverage instructions apply
- DMEPOS payment category
- Ostomy, tracheostomy & urological supplies
- Prior authorization
- Not on Medicare required-PA list
- Status
- Active (April 2026 HCPCS)
Prior authorization
Not on the Medicare required-PA list as of the January 13, 2026 update (74 items). Medicare Advantage and commercial plans set their own prior-authorization rules for this code — verify per plan before delivery.
A4373 Medicare fee schedule (April 2026)
Base (no modifier) Ostomy, tracheostomy & urological supplies
Medicare allowable ranges from $8.94 to $9.83 depending on state and rural status.
Former-CBA payment limits: ceiling $8.94 · floor $7.60
| State | Non-rural | Rural |
|---|---|---|
| AK | $9.02 | — |
| AL | $8.94 | — |
| AR | $8.94 | — |
| AZ | $8.94 | — |
| CA | $8.94 | — |
| CO | $8.94 | — |
| CT | $8.94 | — |
| DC | $8.94 | — |
| DE | $8.94 | — |
| FL | $8.94 | — |
| GA | $8.94 | — |
| HI | $9.64 | — |
| IA | $8.94 | — |
| ID | $8.94 | — |
| IL | $8.94 | — |
| IN | $8.94 | — |
| KS | $8.94 | — |
| KY | $8.94 | — |
| LA | $8.94 | — |
| MA | $8.94 | — |
| MD | $8.94 | — |
| ME | $8.94 | — |
| MI | $8.94 | — |
| MN | $8.94 | — |
| MO | $8.94 | — |
| MS | $8.94 | — |
| MT | $8.94 | — |
| NC | $8.94 | — |
| ND | $8.94 | — |
| NE | $8.94 | — |
| NH | $8.94 | — |
| NJ | $8.94 | — |
| NM | $8.94 | — |
| NV | $8.94 | — |
| NY | $8.94 | — |
| OH | $8.94 | — |
| OK | $8.94 | — |
| OR | $8.94 | — |
| PA | $8.94 | — |
| PR | $9.83 | — |
| RI | $8.94 | — |
| SC | $8.94 | — |
| SD | $8.94 | — |
| TN | $8.94 | — |
| TX | $8.94 | — |
| UT | $8.94 | — |
| VA | $8.94 | — |
| VI | $8.94 | — |
| VT | $8.94 | — |
| WA | $8.94 | — |
| WI | $8.94 | — |
| WV | $8.94 | — |
| WY | $8.94 | — |
Amounts are the Medicare DMEPOS fee-schedule allowables effective April 2026.
Medicare typically pays 80% of the allowable after the Part B deductible; the patient owes 20%.
A 2% sequestration reduction applies to the Medicare share. Former competitive-bidding-area
adjustments and non-continental rates can differ — verify with your DME MAC.
Common denial codes to watch
Related A-codes
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