Q4346 HCPCS code: Shelter dm matrix, per square centimeter (add-on, list separately in addition to primary procedure)
Q4346 is the HCPCS Level II code for shelter dm matrix, per square centimeter (add-on, list separately in addition to primary procedure). Its Medicare coverage code is C (Carrier judgment): Coverage is decided by the Medicare contractor (MAC) case by case.
Code details
| Field | Value |
|---|---|
| Section | Q codes — Temporary codes |
| Coverage code | C — Carrier judgment |
| Pricing indicator | 11 — Priced using national relative value units (Physician Fee Schedule) |
| BETOS category | O1E — Other drugs |
| Added | 2025-01-01 |
| Last action effective | 2026-01-01 |
What changed for Q4346
- January 2026: Descriptor revised (Was: Shelter dm matrix, per square centimeter)
- 2025-01-01: Q4346 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 Q4346?
Q4346 is the HCPCS Level II code for shelter dm matrix, per square centimeter (add-on, list separately in addition to primary procedure). Short descriptor: "Shelter dm matrix per sq cm".
Does Medicare cover Q4346?
Coverage code C — Carrier judgment. Coverage is decided by the Medicare contractor (MAC) case by case.
Related Q43 codes
- Q4300 — Acesso tl, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4301 — Activate matrix, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4302 — Complete aca, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4303 — Complete aa, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4304 — Grafix plus, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4305 — American amnion ac tri-layer, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4306 — American amnion ac, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4307 — American amnion, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4308 — Sanopellis, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4309 — Via matrix, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4310 — Procenta, per 100 mg
- Q4311 — Acesso, per square centimeter (add-on, list separately in addition to primary procedure)
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Next steps
- Run a reimbursement report for a device billed under Q4346
- Watch Q4346 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for Q4346
Sources: CMS HCPCS Level II release October 2026; 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.