A9509 HCPCS code: Iodine i-123 sodium iodide, diagnostic, per millicurie
A9509 is the HCPCS Level II code for iodine i-123 sodium iodide, diagnostic, per millicurie. In 2024 Medicare paid an average of $243.30 per service for A9509 across 65 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 5 per day on outpatient hospital claims. Medicare volume fell 18% from 2022 to 2024 (79 to 65 services). In 2024, about 21 clinicians billed Medicare for A9509 for 37 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 | 2008-01-01 |
| Last action effective | 2008-01-01 |
Who bills A9509 (2024)
| Measure | Value |
|---|---|
| Clinicians billing (by place of service) | 21 |
| Medicare beneficiaries | 37 |
| States with claims | 0 |
Counts only. Supplier and clinician names, contact lists and state-by-state detail are in Caduvo.
Medicare utilization for A9509, 2022–2024
| Year | Services | Beneficiaries | Avg. allowed | Avg. paid |
|---|---|---|---|---|
| 2022 | 79 | 42 | $357.10 | $285.55 |
| 2023 | 77 | 39 | $326.13 | $260.53 |
| 2024 | 65 | 37 | $305.35 | $243.30 |
NCCI unit limits (MUE)
| Claim type | Max units per day | Rationale |
|---|---|---|
| outpatient hospital claims | 5 | Clinical: Society Comment |
| practitioner claims | 5 | Clinical: Society Comment |
What changed for A9509
- 2008-01-01: A9509 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 A9509?
A9509 is the HCPCS Level II code for iodine i-123 sodium iodide, diagnostic, per millicurie. Short descriptor: "Iodine i-123 sod iodide mil".
How much does Medicare pay for A9509?
In 2024, the average Medicare payment was $243.30 per service (average allowed $305.35).
Does Medicare cover A9509?
Coverage code C — Carrier judgment. Coverage is decided by the Medicare contractor (MAC) case by case.
How many units of A9509 can be billed per day?
5 on outpatient hospital claims; 5 on practitioner claims (NCCI medically unlikely edits).
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Next steps
- Run a reimbursement report for a device billed under A9509
- Watch A9509 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for A9509
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.