C9355 — Collagen nerve cuff (neuromatrix), per 0.5 centimeter length
C9355 is a HCPCS Level II code for collagen nerve cuff (neuromatrix), per 0.5 centimeter length. It belongs to the Outpatient Prospective Payment System 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.
Medically Unlikely Edits — units per day
The most units of C9355 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
- 5 units MAI 3 — Date of Service Edit: Clinical · Prescribing Information
- outpatient
- 5 units MAI 3 — Date of Service Edit: Clinical · Prescribing Information
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 C9355
- Long descriptor
- Collagen nerve cuff (neuromatrix), per 0.5 centimeter length
- Short descriptor
- Neuromatrix nerve cuff, cm
- Added
- January 1, 2008
- BETOS
- D1A
- Pricing indicator
- 53 — Other
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.
Statute.
Codes adjacent to C9355
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If C9355 is not quite right, the correct code is very often within a few positions of it.
- C9307Injection, linvoseltamab-gcpt, 1 mgterminated
- C9308Injection, carboplatin (avyxa), 1 mgterminated
- C9309Injection, onasemnogene abeparvovec-brve, per treatmentterminated
- C9310Injection, leucovorin calcium (avyxa), 1 mg
- C9349Puraply, and puraply antimicrobial, any type, per square centimeterterminated
- C9352Microporous collagen implantable tube (neuragen nerve guide), per centimeter length
- C9353Microporous collagen implantable slit tube (neurawrap nerve protector), per centimeter length
- C9354Acellular pericardial tissue matrix of non-human origin (veritas), per square centimeter
- C9356Tendon, porous matrix of cross-linked collagen and glycosaminoglycan matrix (tenoglide tendon protector sheet), per square centimeter
- C9358Dermal substitute, native, non-denatured collagen, fetal bovine origin (surgimend collagen matrix), per 0.5 square centimeters
- C9359Porous purified collagen matrix bone void filler (integra mozaik osteoconductive scaffold putty, integra os osteoconductive scaffold putty), per 0.5 cc
- C9360Dermal substitute, native, non-denatured collagen, neonatal bovine origin (surgimend collagen matrix), per 0.5 square centimeters
- C9361Collagen matrix nerve wrap (neuromend collagen nerve wrap), per 0.5 centimeter length
- C9362Porous purified collagen matrix bone void filler (integra mozaik osteoconductive scaffold strip), per 0.5 cc
- C9363Skin substitute, integra meshed bilayer wound matrix, per square centimeter
- C9364Porcine implant, permacol, per square centimeter
Questions about C9355
What is HCPCS code C9355?
C9355 is a HCPCS Level II code for collagen nerve cuff (neuromatrix), per 0.5 centimeter length. It sits in the Outpatient Prospective Payment System section.
Does Medicare cover C9355?
The CMS HCPCS file marks C9355 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.