A9584 HCPCS code: Iodine 1-123 ioflupane, diagnostic, per study dose, up to 5 millicuries
A9584 is the HCPCS Level II code for iodine 1-123 ioflupane, diagnostic, per study dose, up to 5 millicuries. In 2024 Medicare paid an average of $2,069.36 per service for A9584 across 8,208 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 1 per day on outpatient hospital claims. Medicare volume rose 20% from 2022 to 2024 (6,828 to 8,208 services). In 2024, about 387 clinicians billed Medicare for A9584 for 8,193 beneficiaries; Florida, California, Texas accounted for 51% of services.
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 | 2012-01-01 |
| Last action effective | 2025-01-01 |
Who bills A9584 (2024)
| Measure | Value |
|---|---|
| Clinicians billing (by place of service) | 387 |
| Medicare beneficiaries | 8,193 |
| States with claims | 28 |
| Share of services in top 3 states (Florida, California, Texas) | 51% |
Counts only. Supplier and clinician names, contact lists and state-by-state detail are in Caduvo.
Medicare utilization for A9584, 2022–2024
| Year | Services | Beneficiaries | Avg. allowed | Avg. paid |
|---|---|---|---|---|
| 2022 | 6,828 | 6,810 | $2,647.74 | $2,112.17 |
| 2023 | 7,577 | 7,567 | $2,599.72 | $2,070.16 |
| 2024 | 8,208 | 8,193 | $2,600.09 | $2,069.36 |
States with the most A9584 services (2024)
| State | Services | Avg. paid |
|---|---|---|
| Florida | 1,946 | $2,095.72 |
| California | 1,140 | $2,193.59 |
| Texas | 1,113 | $1,863.88 |
| Arizona | 850 | $2,191.70 |
| Maryland | 434 | $2,156.00 |
NCCI unit limits (MUE)
| Claim type | Max units per day | Rationale |
|---|---|---|
| outpatient hospital claims | 1 | Code Descriptor / CPT Instruction |
| practitioner claims | 1 | Code Descriptor / CPT Instruction |
What changed for A9584
- 2012-01-01: A9584 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 A9584?
A9584 is the HCPCS Level II code for iodine 1-123 ioflupane, diagnostic, per study dose, up to 5 millicuries. Short descriptor: "Iodine i-123 ioflupane".
How much does Medicare pay for A9584?
In 2024, the average Medicare payment was $2,069.36 per service (average allowed $2,600.09).
Does Medicare cover A9584?
Coverage code C — Carrier judgment. Coverage is decided by the Medicare contractor (MAC) case by case.
How many units of A9584 can be billed per day?
1 on outpatient hospital claims; 1 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 A9584
- Watch A9584 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for A9584
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.