A6550 HCPCS code: Wound care set, for negative pressure wound therapy electrical pump, includes all supplies and accessories
A6550 is the HCPCS Level II code for wound care set, for negative pressure wound therapy electrical pump, includes all supplies and accessories. The 2026 Medicare DMEPOS fee schedule pays $31.08 to $37.54 depending on the state. Its Medicare coverage code is C (Carrier judgment): Coverage is decided by the Medicare contractor (MAC) case by case. The NCCI unit limit is 1 per day on outpatient hospital claims. Medicare volume fell 9% from 2022 to 2024 (803,067 to 730,975 services). In 2024, 733 suppliers billed Medicare for A6550 (purchases), serving 36,478 beneficiaries; Texas, California, Florida accounted for 24% of services. Its average fee ranks 5 of 63 A65 codes (family range $0.18–$1,274.45); rural fees run 6% higher.
Code details
| Field | Value |
|---|---|
| Section | A codes — Transportation, medical/surgical supplies and miscellaneous |
| Coverage code | C — Carrier judgment |
| Pricing indicator | 34 — DMEPOS: supplies necessary for the effective use of DME |
| BETOS category | D1E — Other durable medical equipment |
| Added | 2004-01-01 |
| Last action effective | 2006-01-01 |
2026 Medicare DMEPOS fee schedule for A6550
| Modifier | Meaning | Lowest state fee | Highest state fee | Ceiling | Floor |
|---|---|---|---|---|---|
| — | base fee | $31.08 | $37.54 | — | — |
| State | Modifier | Fee | Rural fee |
|---|---|---|---|
| AK | — | $33.70 | — |
| AL | — | $31.35 | $33.70 |
| AR | — | $31.35 | $33.70 |
| AZ | — | $31.35 | $33.70 |
| CA | — | $31.31 | $33.70 |
| CO | — | $31.08 | $33.70 |
| CT | — | $31.67 | $33.70 |
| DC | — | $31.76 | $33.70 |
| DE | — | $31.76 | $33.70 |
| FL | — | $31.35 | $33.70 |
| GA | — | $31.35 | $33.70 |
| HI | — | $33.70 | — |
| IA | — | $31.78 | $33.70 |
| ID | — | $31.08 | $33.70 |
| IL | — | $31.92 | $33.70 |
| IN | — | $31.92 | $33.70 |
| KS | — | $31.78 | $33.70 |
| KY | — | $31.35 | $33.70 |
| LA | — | $31.35 | $33.70 |
| MA | — | $31.67 | $33.70 |
| MD | — | $31.76 | $33.70 |
| ME | — | $31.67 | $33.70 |
| MI | — | $31.92 | $33.70 |
| MN | — | $31.78 | $33.70 |
| MO | — | $31.78 | $33.70 |
| MS | — | $31.35 | $33.70 |
| MT | — | $31.08 | $33.70 |
| NC | — | $31.35 | $33.70 |
| ND | — | $31.78 | $33.70 |
| NE | — | $31.78 | $33.70 |
| NH | — | $31.67 | $33.70 |
| NJ | — | $31.76 | $33.70 |
| NM | — | $31.35 | $33.70 |
| NV | — | $31.31 | $33.70 |
| NY | — | $31.76 | $33.70 |
| OH | — | $31.92 | $33.70 |
| OK | — | $31.35 | $33.70 |
| OR | — | $31.31 | $33.70 |
| PA | — | $31.76 | $33.70 |
| PR | — | $37.54 | — |
| RI | — | $31.67 | $33.70 |
| SC | — | $31.35 | $33.70 |
| SD | — | $31.78 | $33.70 |
| TN | — | $31.35 | $33.70 |
| TX | — | $31.35 | $33.70 |
| UT | — | $31.08 | $33.70 |
| VA | — | $31.35 | $33.70 |
| VI | — | $33.70 | — |
| VT | — | $31.67 | $33.70 |
| WA | — | $31.31 | $33.70 |
| WI | — | $31.92 | $33.70 |
| WV | — | $31.35 | $33.70 |
| WY | — | $31.08 | $33.70 |
How the A6550 fee compares
| Measure | Value |
|---|---|
| Rank among 63 A65 codes (lowest = 1) | 5 |
| Family fee range (average of state fees) | $0.18–$1,274.45 |
| Rural fee uplift | 6.1% |
Who bills A6550 (2024)
| Measure | Value |
|---|---|
| Suppliers billing rentals | — |
| Suppliers billing purchases | 733 |
| Referring clinicians | 23,051 |
| Medicare beneficiaries | 36,478 |
| States with claims | 52 |
| Share of services in top 3 states (Texas, California, Florida) | 24% |
| Year | Suppliers | Beneficiaries |
|---|---|---|
| 2022 | 825 | 39,316 |
| 2023 | 809 | 38,172 |
| 2024 | 733 | 36,478 |
Counts only. Supplier and clinician names, contact lists and state-by-state detail are in Caduvo.
Medicare utilization for A6550, 2022–2024
| Year | Services | Beneficiaries | Avg. allowed | Avg. paid |
|---|---|---|---|---|
| 2022 | 803,067 | 39,316 | $27.58 | $21.69 |
| 2023 | 785,399 | 38,172 | $29.63 | $23.11 |
| 2024 | 730,975 | 36,478 | $30.35 | $23.67 |
States with the most A6550 services (2024)
| State | Services | Avg. paid |
|---|---|---|
| Texas | 59,273 | $23.55 |
| California | 58,732 | $23.56 |
| Florida | 58,344 | $22.18 |
| Pennsylvania | 32,181 | $23.71 |
| New York | 31,748 | $23.52 |
NCCI unit limits (MUE)
| Claim type | Max units per day | Rationale |
|---|---|---|
| outpatient hospital claims | 1 | Clinical: CMS Workgroup |
Medicare policy articles for this code
- A52511: Negative Pressure Wound Therapy Pumps - Policy Article (CGS Administrators, LLC (DME MAC) Noridian Healthcare Solutions, LLC (DME MAC)) — mentions this code in its coding guidance
What changed for A6550
- 2026-01-01: Average state fee rose 2.7%: $30.94 to $31.76
- 2004-01-01: A6550 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 A6550?
A6550 is the HCPCS Level II code for wound care set, for negative pressure wound therapy electrical pump, includes all supplies and accessories. Short descriptor: "Neg pres wound ther drsg set".
How much does Medicare pay for A6550?
Under the 2026 DMEPOS fee schedule, non-rural state fees are base (base fee): $31.08–$37.54. Rural fees can be higher.
Does Medicare cover A6550?
Coverage code C — Carrier judgment. Coverage is decided by the Medicare contractor (MAC) case by case.
Did the Medicare fee for A6550 change in 2026?
The average non-rural state fee moved from $30.94 in 2025 to $31.76 in 2026 (+2.7%). CMS's next quarterly HCPCS and DMEPOS update takes effect January 1, 2027.
How many units of A6550 can be billed per day?
1 on outpatient hospital claims (NCCI medically unlikely edits).
Related A65 codes
- A6501 — Compression burn garment, bodysuit (head to foot), custom fabricated
- A6502 — Compression burn garment, chin strap, custom fabricated
- A6503 — Compression burn garment, facial hood, custom fabricated
- A6504 — Compression burn garment, glove to wrist, custom fabricated
- A6505 — Compression burn garment, glove to elbow, custom fabricated
- A6506 — Compression burn garment, glove to axilla, custom fabricated
- A6507 — Compression burn garment, foot to knee length, custom fabricated
- A6508 — Compression burn garment, foot to thigh length, custom fabricated
- A6509 — Compression burn garment, upper trunk to waist including arm openings (vest), custom fabricated
- A6510 — Compression burn garment, trunk, including arms down to leg openings (leotard), custom fabricated
- A6511 — Compression burn garment, lower trunk including leg openings (panty), custom fabricated
- A6512 — Compression burn garment, not otherwise classified
Building a device that would bill under a code like this? Caduvo matches a device description to HCPCS/CPT codes, Medicare coverage and payment, and the FDA pathway in one report.
Next steps
- Run a reimbursement report for a device billed under A6550
- Watch A6550 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for A6550
Sources: CMS HCPCS Level II release October 2025; CMS DMEPOS fee schedule 2026; 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.