A9548 — Indium in-111 pentetate, diagnostic, per 0.5 millicurie
A9548 is a HCPCS Level II code for indium in-111 pentetate, 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 A9548 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 A9548
- Long descriptor
- Indium in-111 pentetate, diagnostic, per 0.5 millicurie
- Short descriptor
- In111 pentetate
- Added
- January 1, 2006
- BETOS
- I1E
- Pricing indicator
- 53 — 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.
Statute.
Codes adjacent to A9548
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If A9548 is not quite right, the correct code is very often within a few positions of it.
- A9540Technetium tc-99m macroaggregated albumin, diagnostic, per study dose, up to 10 millicuries
- A9541Technetium tc-99m sulfur colloid, diagnostic, per study dose, up to 20 millicuries
- A9542Indium in-111 ibritumomab tiuxetan, diagnostic, per study dose, up to 5 millicuries
- A9543Yttrium y-90 ibritumomab tiuxetan, therapeutic, per treatment dose, up to 40 millicuries
- A9544Iodine i-131 tositumomab, diagnostic, per study doseterminated
- A9545Iodine i-131 tositumomab, therapeutic, per treatment doseterminated
- A9546Cobalt co-57/58, cyanocobalamin, diagnostic, per study dose, up to 1 microcurie
- A9547Indium in-111 oxyquinoline, diagnostic, per 0.5 millicurie
- A9550Technetium tc-99m sodium gluceptate, diagnostic, per study dose, up to 25 millicurie
- A9551Technetium tc-99m succimer, diagnostic, per study dose, up to 10 millicuries
- A9552Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries
- A9553Chromium cr-51 sodium chromate, diagnostic, per study dose, up to 250 microcuries
- A9554Iodine i-125 sodium iothalamate, diagnostic, per study dose, up to 10 microcuries
- A9555Rubidium rb-82, diagnostic, per study dose, up to 60 millicuries
- A9556Gallium ga-67 citrate, diagnostic, per millicurie
- A9557Technetium tc-99m bicisate, diagnostic, per study dose, up to 25 millicuries
Questions about A9548
What is HCPCS code A9548?
A9548 is a HCPCS Level II code for indium in-111 pentetate, diagnostic, per 0.5 millicurie. It sits in the Transportation, Medical & Surgical Supplies, Administrative section.
Does Medicare cover A9548?
The CMS HCPCS file marks A9548 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 A9548 paid under the physician fee schedule?
A9548 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.