HCPCS code A9541: Sulfur colloid, per study dose2026 Medicare rate & RVUs in New Mexico
Technetium-99m sulfur colloid is a diagnostic radiopharmaceutical reported per study dose for selected liver-spleen, gastric-emptying, and lymphatic imaging.
CMS doesn’t publish a rate for A9541 in New Mexico.
Check a contract rate as a % of Medicare · A9541 nationwide
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
On this page 11 sections
What A9541 covers
Technetium-99m sulfur colloid is a diagnostic radiopharmaceutical used in nuclear medicine. Depending on the study, it may be administered intravenously for liver-spleen imaging, orally for gastric-emptying evaluation, or by local injection for lymphatic mapping. Nuclear medicine departments and other entities billing the radiopharmaceutical report this code alongside the applicable imaging service when the dose is supplied for the study.
The physician fee schedule status is C: CMS publishes no national payment, and the Medicare Administrative Contractor sets payment for each claim under other contractor pricing. Coverage is left to the contractor’s judgment. One code represents a study dose of up to 20 millicuries; it is not a per-millicurie unit. The dose and administration route depend on the examination being performed.
This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.
How New Mexico compares for A9541
- New Mexico · this pageUnavailable
- Los Angeles, CA · CaliforniaUnavailable
- Washington, DC area · District of ColumbiaUnavailable
- Miami, FL · FloridaUnavailable
- Chicago, IL · IllinoisUnavailable
- Manhattan, NY · New YorkUnavailable
- Alaska · AlaskaUnavailable
Other areas in New Mexico first, then benchmark localities. Bars start at $0.
Every other payment area
A9541 rates by state
Office rate range in each state. Select a state to see its payment localities.
Explore a state
Local rates. Clear comparisons.
Hover or focus a tile to see its rate range. Select it to open the state’s fee schedule.
View every state and territory as a table
| State / territory | Office rate range | Localities |
|---|---|---|
| AK | No published base rate | 1 |
| AL | No published base rate | 1 |
| AR | No published base rate | 1 |
| AZ | No published base rate | 1 |
| CA | No published base rate | 29 |
| CO | No published base rate | 1 |
| CT | No published base rate | 1 |
| DC | No published base rate | 1 |
| DE | No published base rate | 1 |
| FL | No published base rate | 3 |
| GA | No published base rate | 2 |
| GU | No published base rate | 1 |
| HI | No published base rate | 1 |
| IA | No published base rate | 1 |
| ID | No published base rate | 1 |
| IL | No published base rate | 4 |
| IN | No published base rate | 1 |
| KS | No published base rate | 1 |
| KY | No published base rate | 1 |
| LA | No published base rate | 2 |
| MA | No published base rate | 2 |
| MD | No published base rate | 3 |
| ME | No published base rate | 2 |
| MI | No published base rate | 2 |
| MN | No published base rate | 1 |
| MO | No published base rate | 3 |
| MS | No published base rate | 1 |
| MT | No published base rate | 1 |
| NC | No published base rate | 1 |
| ND | No published base rate | 1 |
| NE | No published base rate | 1 |
| NH | No published base rate | 1 |
| NJ | No published base rate | 2 |
| NM | No published base rate | 1 |
| NV | No published base rate | 1 |
| NY | No published base rate | 5 |
| OH | No published base rate | 1 |
| OK | No published base rate | 1 |
| OR | No published base rate | 2 |
| PA | No published base rate | 2 |
| PR | No published base rate | 1 |
| RI | No published base rate | 1 |
| SC | No published base rate | 1 |
| SD | No published base rate | 1 |
| TN | No published base rate | 1 |
| TX | No published base rate | 8 |
| UT | No published base rate | 1 |
| VA | No published base rate | 2 |
| VI | No published base rate | 1 |
| VT | No published base rate | 1 |
| WA | No published base rate | 2 |
| WI | No published base rate | 1 |
| WV | No published base rate | 1 |
| WY | No published base rate | 1 |
How the A9541 rate is calculated
Each of A9541’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.
How the rate is built · A9541
RVUs × geographic indexes × conversion factor
Work0.00
0.00 RVUs× 1.000 GPCI
Practice expense0.00
0.00 RVUs× 1.000 GPCI
Malpractice0.00
0.00 RVUs× 1.000 GPCI
Adjusted RVUs
0.0000
Conversion factor
$33.4009
Medicare rate
$0.00
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for A9541
A9541 has no global surgery period, no multiple-procedure, bilateral or assistant-at-surgery adjustment, and no professional/technical split. What changes the payment is where the service happens: the place of service on the claim decides whether Medicare pays the office or the facility rate.
Place of service · A9541
Which rate does Medicare pay?
The POS code on the claim line (CMS-1500 box 24B).
POS 11 · non-facility rate · national
—
A9541 isn’t priced in this setting.
How A9541 has changed in New Mexico
A9541 · Office / nonfacility
Rate unavailable
Effective 2026-10-01
A rate is unavailable in one of these releases, so a change cannot be calculated.
One bar per available release, ordered by effective date. Missing rates remain gaps. These comparisons hold the code, setting and locality identifiers constant; they do not isolate which policy or input caused a change.
What changed, release by release
| Effective from | Office | Facility | CMS release |
|---|---|---|---|
| 2026-10-01 | Contractor-priced | Contractor-priced | RVU26D |
| 2026-07-01 | Contractor-priced | Contractor-priced | RVU26C |
| 2026-04-01 | Contractor-priced | Contractor-priced | RVU26B |
| 2026-01-01 | Contractor-priced | Contractor-priced | RVU26A |
| 2025-10-01 | Contractor-priced | Contractor-priced | RVU25D |
| 2025-07-01 | Contractor-priced | Contractor-priced | RVU25C |
| 2025-04-01 | Contractor-priced | Contractor-priced | RVU25B |
| 2025-01-01 | Contractor-priced | Contractor-priced | RVU25A |
| 2024-10-01 | Contractor-priced | Contractor-priced | RVU24D |
| 2024-07-01 | Contractor-priced | Contractor-priced | RVU24C |
| 2024-04-01 | Contractor-priced | Contractor-priced | RVU24B |
| 2024-03-09 | Contractor-priced | Contractor-priced | RVU24AR |
| 2024-01-01 | Contractor-priced | Contractor-priced | RVU24A |
| 2023-10-01 | Contractor-priced | Contractor-priced | RVU23D |
| 2023-07-01 | Contractor-priced | Contractor-priced | RVU23C |
| 2023-04-01 | Contractor-priced | Contractor-priced | RVU23B |
| 2023-01-01 | Contractor-priced | Contractor-priced | RVU23A |
| 2022-10-01 | Contractor-priced | Contractor-priced | RVU22D |
| 2022-07-01 | Contractor-priced | Contractor-priced | RVU22C |
| 2022-04-01 | Contractor-priced | Contractor-priced | RVU22B |
| 2022-01-01 | Contractor-priced | Contractor-priced | RVU22A |
| 2021-10-01 | Contractor-priced | Contractor-priced | RVU21D |
| 2021-07-01 | Contractor-priced | Contractor-priced | RVU21C |
| 2021-04-01 | Contractor-priced | Contractor-priced | RVU21B |
| 2021-01-01 | Contractor-priced | Contractor-priced | RVU21A |
| 2020-10-01 | Contractor-priced | Contractor-priced | RVU20D |
| 2020-07-01 | Contractor-priced | Contractor-priced | RVU20C |
| 2020-04-01 | Contractor-priced | Contractor-priced | RVU20B |
| 2020-01-01 | Contractor-priced | Contractor-priced | RVU20A |
| 2019-10-01 | Contractor-priced | Contractor-priced | RVU19D |
| 2019-07-01 | Contractor-priced | Contractor-priced | RVU19C |
| 2019-04-01 | Contractor-priced | Contractor-priced | RVU19B |
| 2019-01-01 | Contractor-priced | Contractor-priced | RVU19A |
| 2018-10-01 | Contractor-priced | Contractor-priced | RVU18D |
| 2018-07-01 | Contractor-priced | Contractor-priced | RVU18C |
| 2018-04-01 | Contractor-priced | Contractor-priced | RVU18B |
| 2018-01-01 | Contractor-priced | Contractor-priced | RVU18AR1 |
| 2017-10-01 | Contractor-priced | Contractor-priced | RVU17D |
| 2017-07-01 | Contractor-priced | Contractor-priced | RVU17C |
| 2017-04-01 | Contractor-priced | Contractor-priced | RVU17B |
| 2017-01-01 | Contractor-priced | Contractor-priced | RVU17A |
| 2016-10-01 | Contractor-priced | Contractor-priced | RVU16D |
| 2016-07-01 | Contractor-priced | Contractor-priced | RVU16C |
| 2016-04-01 | Contractor-priced | Contractor-priced | RVU16B |
| 2016-01-01 | Contractor-priced | Contractor-priced | RVU16A |
| 2015-10-01 | Contractor-priced | Contractor-priced | RVU15D |
| 2015-07-01 | Contractor-priced | Contractor-priced | RVU15C |
| 2015-04-01 | Contractor-priced | Contractor-priced | RVU15B |
| 2015-01-01 | Contractor-priced | Contractor-priced | RVU15A |
| 2014-10-01 | Contractor-priced | Contractor-priced | RVU14D |
| 2014-07-01 | Contractor-priced | Contractor-priced | RVU14C |
| 2014-04-01 | Contractor-priced | Contractor-priced | RVU14B |
| 2014-01-01 | Contractor-priced | Contractor-priced | RVU14A |
| 2013-10-01 | Contractor-priced | Contractor-priced | RVU13D |
| 2013-07-01 | Contractor-priced | Contractor-priced | RVU13C |
| 2013-04-01 | Contractor-priced | Contractor-priced | RVU13B |
| 2013-01-01 | Contractor-priced | Contractor-priced | RVU13AR |
Where the New Mexico rate applies
New Mexico is a Medicare payment area, not a city. Our Census mapping connects it to 528 cities and communities in New Mexico. Some span more than one payment area; confirm with the service ZIP.
- Abeytas
- Abiquiu
- Acomita Lake
- Adelino
- Agua Fria
- Alamillo
- Alamo
- Alamogordo
A9541 billing questions
Is A9541 billed per millicurie?
No. It represents a diagnostic study dose of up to 20 millicuries, rather than a unit for each millicurie.
Which imaging studies commonly use sulfur colloid?
Common uses include liver-spleen imaging, gastric-emptying studies, and lymphatic imaging or mapping. The study determines the administration route.
How does A9541 differ from A9540?
A9541 is technetium-99m sulfur colloid for studies such as liver-spleen, gastric-emptying, or lymphatic imaging. A9540 is technetium-99m macroaggregated albumin, commonly used for lung perfusion imaging.
How does Medicare price A9541?
Its physician fee schedule status is C, so CMS publishes no national payment. The Medicare Administrative Contractor sets claim payment under other contractor pricing, and coverage is left to that contractor’s judgment.
Should the administration route determine code selection?
A9541 identifies the sulfur colloid study dose, not a particular route. Select the radiopharmaceutical code for the agent supplied.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.
CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027
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