A9508 — Iodine i-131 iobenguane sulfate, diagnostic, per 0.5 millicurie
A9508 is a HCPCS Level II code for iodine i-131 iobenguane sulfate, diagnostic, per 0.5 millicurie. It belongs to the Transportation, Medical & Surgical Supplies, Administrative section. Whether Medicare pays it depends on the coverage rule below.
Medicare coverage: Carrier judgment
Coverage is decided by your Medicare contractor, not by national policy. Whether this is paid depends on the LCD for your jurisdiction and on what the documentation supports.
From the coverage field of the CMS Alpha-Numeric HCPCS File, release 2026Q3-Jul. This states Medicare’s position on the code, not on your particular claim.
Physician fee schedule statusC
Contractor-priced. Your MAC establishes the RVUs and the payment amount case by case, usually after reviewing documentation. There is no national amount to compute.
Global period: XXX
Want the dollar amount for your locality? The fee calculator applies your GPCI and the current conversion factor.
Medically Unlikely Edits — units per day
The most units of A9508 Medicare will pay on one date of service. Bill more on a single line and it is denied. The limit is not the same in every setting, so the row that matters is the one matching the claim you are building.
- practitioner
- 2 units MAI 3 — Date of Service Edit: Clinical · Prescribing Information
- outpatient
- 2 units MAI 3 — Date of Service Edit: Clinical · Prescribing Information
The adjudication indicator decides whether exceeding the limit is worth appealing at all: MAI 1 is a line edit you can support with documentation, MAI 3 is a date-of-service edit that is also appealable, and MAI 2 is absolute — no documentation overrides it. CMS MUE 2026Q3.
The CMS record for A9508
- Long descriptor
- Iodine i-131 iobenguane sulfate, diagnostic, per 0.5 millicurie
- Short descriptor
- I131 iodobenguate, dx
- Added
- January 1, 2001
- BETOS
- I1E
- Pricing indicator
- 51 — Other
The official wording. This is what the code means.
CMS's 28-character form, which is what shows up on a remittance advice.
When CMS introduced the code.
Berenson-Eggers Type of Service — CMS's own analytic grouping.
Drugs.
Codes adjacent to A9508
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If A9508 is not quite right, the correct code is very often within a few positions of it.
- A9500Technetium tc-99m sestamibi, diagnostic, per study dose
- A9501Technetium tc-99m teboroxime, diagnostic, per study dose
- A9502Technetium tc-99m tetrofosmin, diagnostic, per study dose
- A9503Technetium tc-99m medronate, diagnostic, per study dose, up to 30 millicuries
- A9504Technetium tc-99m apcitide, diagnostic, per study dose, up to 20 millicuries
- A9505Thallium tl-201 thallous chloride, diagnostic, per millicurie
- A9506Graphite crucible for preparation of technetium tc 99m-labeled carbon aerosol, one crucible
- A9507Indium in-111 capromab pendetide, diagnostic, per study dose, up to 10 millicuries
- A9509Iodine i-123 sodium iodide, diagnostic, per millicurie
- A9510Technetium tc-99m disofenin, diagnostic, per study dose, up to 15 millicuries
- A9512Technetium tc-99m pertechnetate, diagnostic, per millicurie
- A9513Lutetium lu 177, dotatate, therapeutic, 1 millicurie
- A9515Choline c-11, diagnostic, per study dose up to 20 millicuries
- A9516Iodine i-123 sodium iodide, diagnostic, per 100 microcuries, up to 999 microcuries
- A9517Iodine i-131 sodium iodide capsule(s), therapeutic, per millicurie
- A9520Technetium tc-99m tilmanocept, diagnostic, up to 0.5 millicuries
Questions about A9508
What is HCPCS code A9508?
A9508 is a HCPCS Level II code for iodine i-131 iobenguane sulfate, diagnostic, per 0.5 millicurie. It sits in the Transportation, Medical & Surgical Supplies, Administrative section.
Does Medicare cover A9508?
The CMS HCPCS file marks A9508 as "Carrier judgment". Coverage is decided by your Medicare contractor, not by national policy. Whether this is paid depends on the LCD for your jurisdiction and on what the documentation supports.
How is A9508 paid under the physician fee schedule?
A9508 carries PFS status code C. Contractor-priced. Your MAC establishes the RVUs and the payment amount case by case, usually after reviewing documentation. There is no national amount to compute.