A9556 HCPCS code: Gallium ga-67 citrate, diagnostic, per millicurie
A9556 is the HCPCS Level II code for gallium ga-67 citrate, diagnostic, per millicurie. In 2024 Medicare paid an average of $89.47 per service for A9556 across 216 services. Its Medicare coverage code is C (Carrier judgment): Coverage is decided by the Medicare contractor (MAC) case by case. The NCCI unit limit is 10 per day on outpatient hospital claims. Medicare volume fell 27% from 2022 to 2024 (297 to 216 services). In 2024, about 23 clinicians billed Medicare for A9556 for 34 beneficiaries.
Code details
| Field | Value |
|---|---|
| Section | A codes — Transportation, medical/surgical supplies and miscellaneous |
| Coverage code | C — Carrier judgment |
| Pricing indicator | 57 |
| BETOS category | I1E |
| Added | 2006-01-01 |
| Last action effective | 2006-01-01 |
Who bills A9556 (2024)
| Measure | Value |
|---|---|
| Clinicians billing (by place of service) | 23 |
| Medicare beneficiaries | 34 |
| States with claims | 1 |
Counts only. Supplier and clinician names, contact lists and state-by-state detail are in Caduvo.
Medicare utilization for A9556, 2022–2024
| Year | Services | Beneficiaries | Avg. allowed | Avg. paid |
|---|---|---|---|---|
| 2022 | 297 | 48 | $103.07 | $82.42 |
| 2023 | 109 | 25 | $93.80 | $75.05 |
| 2024 | 216 | 34 | $112.17 | $89.47 |
States with the most A9556 services (2024)
| State | Services | Avg. paid |
|---|---|---|
| California | 93 | $107.88 |
NCCI unit limits (MUE)
| Claim type | Max units per day | Rationale |
|---|---|---|
| outpatient hospital claims | 10 | Prescribing Information |
| practitioner claims | 10 | Prescribing Information |
What changed for A9556
- 2006-01-01: A9556 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 A9556?
A9556 is the HCPCS Level II code for gallium ga-67 citrate, diagnostic, per millicurie. Short descriptor: "Ga67 gallium".
How much does Medicare pay for A9556?
In 2024, the average Medicare payment was $89.47 per service (average allowed $112.17).
Does Medicare cover A9556?
Coverage code C — Carrier judgment. Coverage is decided by the Medicare contractor (MAC) case by case.
How many units of A9556 can be billed per day?
10 on outpatient hospital claims; 10 on practitioner claims (NCCI medically unlikely edits).
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Next steps
- Run a reimbursement report for a device billed under A9556
- Watch A9556 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for A9556
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.