A9584 — Iodine 1-123 ioflupane, diagnostic, per study dose, up to 5 millicuries
A9584 is a HCPCS Level II code for iodine 1-123 ioflupane, diagnostic, per study dose, up to 5 millicuries. 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 statusX
Statutory exclusion. The item or service is not within the statutory definition of 'physician services', so the fee schedule never pays it.
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 A9584 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
- 1 unit MAI 3 — Date of Service Edit: Clinical · Code Descriptor / CPT Instruction
- outpatient
- 1 unit MAI 3 — Date of Service Edit: Clinical · Code Descriptor / CPT Instruction
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 A9584
- Long descriptor
- Iodine 1-123 ioflupane, diagnostic, per study dose, up to 5 millicuries
- Short descriptor
- Iodine i-123 ioflupane
- Added
- January 1, 2012
- BETOS
- I1E
- Pricing indicator
- 57 — 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.
Other carrier priced.
Codes adjacent to A9584
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If A9584 is not quite right, the correct code is very often within a few positions of it.
- A9576Injection, gadoteridol, (prohance multipack), per ml
- A9577Injection, gadobenate dimeglumine (multihance), per ml
- A9578Injection, gadobenate dimeglumine (multihance multipack), per ml
- A9579Injection, gadolinium-based magnetic resonance contrast agent, not otherwise specified (nos), per ml
- A9580Sodium fluoride f-18, diagnostic, per study dose, up to 30 millicuries
- A9581Injection, gadoxetate disodium, 1 ml
- A9582Iodine i-123 iobenguane, diagnostic, per study dose, up to 15 millicuries
- A9583Injection, gadofosveset trisodium, 1 ml
- A9585Injection, gadobutrol, 0.1 ml
- A9586Florbetapir f18, diagnostic, per study dose, up to 10 millicuries
- A9587Gallium ga-68, dotatate, diagnostic, 0.1 millicurie
- A9588Fluciclovine f-18, diagnostic, 1 millicurie
- A9589Instillation, hexaminolevulinate hydrochloride, 100 mg
- A9590Iodine i-131, iobenguane, 1 millicurie
- A9591Fluoroestradiol f 18, diagnostic, 1 millicurie
- A9592Copper cu-64, dotatate, diagnostic, 1 millicurie
Questions about A9584
What is HCPCS code A9584?
A9584 is a HCPCS Level II code for iodine 1-123 ioflupane, diagnostic, per study dose, up to 5 millicuries. It sits in the Transportation, Medical & Surgical Supplies, Administrative section.
Does Medicare cover A9584?
The CMS HCPCS file marks A9584 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 A9584 paid under the physician fee schedule?
A9584 carries PFS status code X. Statutory exclusion. The item or service is not within the statutory definition of 'physician services', so the fee schedule never pays it.