A9590 HCPCS code: Iodine i-131, iobenguane, 1 millicurie
A9590 is the HCPCS Level II code for iodine i-131, iobenguane, 1 millicurie. Its Medicare coverage code is C (Carrier judgment): Coverage is decided by the Medicare contractor (MAC) case by case. The NCCI unit limit is 675 per day on outpatient hospital claims.
Code details
| Field | Value |
|---|---|
| Section | A codes — Transportation, medical/surgical supplies and miscellaneous |
| Coverage code | C — Carrier judgment |
| Pricing indicator | 51 — Drug or biological (priced per ASP/average sales price rules) |
| BETOS category | I1E |
| Added | 2020-01-01 |
| Last action effective | 2020-01-01 |
NCCI unit limits (MUE)
| Claim type | Max units per day | Rationale |
|---|---|---|
| outpatient hospital claims | 675 | CMS Policy |
| practitioner claims | 675 | CMS Policy |
What changed for A9590
- 2020-01-01: A9590 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 A9590?
A9590 is the HCPCS Level II code for iodine i-131, iobenguane, 1 millicurie. Short descriptor: "Iodine i-131 iobenguane 1mci".
Does Medicare cover A9590?
Coverage code C — Carrier judgment. Coverage is decided by the Medicare contractor (MAC) case by case.
How many units of A9590 can be billed per day?
675 on outpatient hospital claims; 675 on practitioner claims (NCCI medically unlikely edits).
Related A95 codes
- A9500 — Technetium tc-99m sestamibi, diagnostic, per study dose
- A9501 — Technetium tc-99m teboroxime, diagnostic, per study dose
- A9502 — Technetium tc-99m tetrofosmin, diagnostic, per study dose
- A9503 — Technetium tc-99m medronate, diagnostic, per study dose, up to 30 millicuries
- A9504 — Technetium tc-99m apcitide, diagnostic, per study dose, up to 20 millicuries
- A9505 — Thallium tl-201 thallous chloride, diagnostic, per millicurie
- A9506 — Graphite crucible for preparation of technetium tc 99m-labeled carbon aerosol, one crucible
- A9507 — Indium in-111 capromab pendetide, diagnostic, per study dose, up to 10 millicuries
- A9508 — Iodine i-131 iobenguane sulfate, diagnostic, per 0.5 millicurie
- A9509 — Iodine i-123 sodium iodide, diagnostic, per millicurie
- A9510 — Technetium tc-99m disofenin, diagnostic, per study dose, up to 15 millicuries
- A9512 — Technetium tc-99m pertechnetate, diagnostic, per millicurie
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Next steps
- Run a reimbursement report for a device billed under A9590
- Watch A9590 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for A9590
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.