A4550 HCPCS code: Surgical trays
A4550 is the HCPCS Level II code for surgical trays. Its Medicare coverage code is D (Special coverage instructions apply): Medicare covers it when its national or local coverage criteria are met. The NCCI unit limit is 3 per day on outpatient hospital claims.
Code details
| Field | Value |
|---|---|
| Section | A codes — Transportation, medical/surgical supplies and miscellaneous |
| Coverage code | D — Special coverage instructions apply |
| Pricing indicator | 11 — Priced using national relative value units (Physician Fee Schedule) |
| BETOS category | Y1 |
| Added | 1982-01-01 |
| Last action effective | 2000-01-01 |
NCCI unit limits (MUE)
| Claim type | Max units per day | Rationale |
|---|---|---|
| outpatient hospital claims | 3 | Clinical: Data |
What changed for A4550
- 1982-01-01: A4550 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 A4550?
A4550 is the HCPCS Level II code for surgical trays. Short descriptor: "Surgical trays".
Does Medicare cover A4550?
Coverage code D — Special coverage instructions apply. Medicare covers it when its national or local coverage criteria are met.
How many units of A4550 can be billed per day?
3 on outpatient hospital claims (NCCI medically unlikely edits).
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)
- A4553 — Non-disposable underpads, all sizes
- A4554 — Disposable underpads, all sizes
- A4555 — Electrode/transducer for use with electrical stimulation device used for cancer treatment, replacement only
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Next steps
- Run a reimbursement report for a device billed under A4550
- Watch A4550 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for A4550
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.