CPT code 93898: Shunt detection, IV microbubble injection2026 Medicare rate & RVUs in New Mexico
Reports transcranial Doppler detection of a venous-to-arterial shunt using intravenous microbubble contrast, typically during evaluation for a right-to-left shunt.
In New Mexico, Medicare pays $243.80 for 93898 in the office.
Check a contract rate as a % of Medicare · 93898 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 93898 covers
This service uses transcranial Doppler monitoring to look for microbubbles passing from the venous circulation into the cerebral arteries, indicating a right-to-left shunt. It may be part of an evaluation for a suspected shunt, including in a patient with an otherwise unexplained stroke or suspected paradoxical embolism. A vascular or neurovascular ultrasound team performs the monitoring, and a qualified clinician interprets the findings.
Report 93898 only as an add-on with 93893; it is not a standalone service. Documentation should support the shunt evaluation and record the intravenous microbubble administration, Doppler monitoring, and interpretation. CMS identifies separately priced professional and technical components: modifier 26 represents the interpretation, modifier TC represents the equipment and staff, and billing without either modifier represents the global service. Payment for this add-on is within the primary procedure’s global period.
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 93898
Across 109 of 109 payment localities, the office rate for 93898 runs from $228.50 in Arkansas to $366.94 in San Benito County, CA. New Mexico pays $243.80. The RVUs are the same everywhere; the geographic indexes change the dollars.
- New Mexico · this page$243.80
- Los Angeles, CA · California$305.25+$61.45
- Washington, DC area · District of Columbia$305.65+$61.85
- Miami, FL · Florida$276.13+$32.33
- Chicago, IL · Illinois$267.35+$23.55
- Manhattan, NY · New York$303.48+$59.68
- Alaska · Alaska$290.28+$46.48
Other areas in New Mexico first, then benchmark localities. Bars start at $0.
Every other payment area
| Payment locality | Office | Facility |
|---|---|---|
| AlabamaAlabama | $232.35 | — |
| ArkansasArkansas | $228.50 | — |
| ArizonaArizona | $254.95 | — |
| Bakersfield, CACalifornia | $284.30 | — |
| Chico, CACalifornia | $284.05 | — |
| El Centro, CACalifornia | $284.06 | — |
| Fresno, CACalifornia | $284.05 | — |
| Hanford, CACalifornia | $284.05 | — |
| Madera, CACalifornia | $284.05 | — |
| Merced, CACalifornia | $284.05 | — |
| Modesto, CACalifornia | $284.05 | — |
| Napa, CACalifornia | $336.78 | — |
| Oxnard, CACalifornia | $304.55 | — |
| Redding, CACalifornia | $284.05 | — |
| Rest of CaliforniaCalifornia | $284.05 | — |
| Riverside, CACalifornia | $284.92 | — |
| Sacramento, CACalifornia | $300.13 | — |
| Salinas, CACalifornia | $299.06 | — |
| San Diego, CACalifornia | $307.64 | — |
| Marin County, CACalifornia | $358.90 | — |
| San Francisco, CACalifornia | $358.80 | — |
| San Benito County, CACalifornia | $366.94 | — |
| Santa Clara County, CACalifornia | $366.57 | — |
| San Luis Obispo, CACalifornia | $294.03 | — |
| Santa Cruz, CACalifornia | $311.78 | — |
| Santa Maria, CACalifornia | $300.60 | — |
| Santa Rosa, CACalifornia | $315.05 | — |
| Stockton, CACalifornia | $284.05 | — |
| Vallejo, CACalifornia | $336.65 | — |
| Visalia, CACalifornia | $284.05 | — |
| Yuba City, CACalifornia | $284.05 | — |
| ColoradoColorado | $277.14 | — |
| ConnecticutConnecticut | $281.52 | — |
| DelawareDelaware | $259.61 | — |
| Fort Lauderdale, FLFlorida | $267.71 | — |
| Rest of FloridaFlorida | $253.66 | — |
| Atlanta, GAGeorgia | $266.87 | — |
| Rest of GeorgiaGeorgia | $237.97 | — |
| Hawaii, Guam, HIHawaii | $293.21 | — |
| IowaIowa | $241.19 | — |
| IdahoIdaho | $242.55 | — |
| East St. Louis, ILIllinois | $246.67 | — |
| Rest of IllinoisIllinois | $243.84 | — |
| Suburban Chicago, ILIllinois | $271.06 | — |
| IndianaIndiana | $244.21 | — |
| KansasKansas | $238.92 | — |
| KentuckyKentucky | $236.54 | — |
| New Orleans, LALouisiana | $249.20 | — |
| Rest of LouisianaLouisiana | $235.72 | — |
| Metropolitan Boston, MAMassachusetts | $308.41 | — |
| Rest of MassachusettsMassachusetts | $274.74 | — |
| Baltimore area, MDMaryland | $280.55 | — |
| Rest of MarylandMaryland | $265.37 | — |
| Rest of MaineMaine | $242.95 | — |
| Southern Maine, MEMaine | $259.46 | — |
| Detroit, MIMichigan | $256.24 | — |
| Rest of MichiganMichigan | $242.68 | — |
| MinnesotaMinnesota | $267.38 | — |
| Metropolitan Kansas City, MOMissouri | $248.31 | — |
| Metropolitan St. Louis, MOMissouri | $251.39 | — |
| Rest of MissouriMissouri | $230.43 | — |
| MississippiMississippi | $229.57 | — |
| MontanaMontana | $262.53 | — |
| North CarolinaNorth Carolina | $246.01 | — |
| North DakotaNorth Dakota | $260.94 | — |
| NebraskaNebraska | $242.99 | — |
| New HampshireNew Hampshire | $271.71 | — |
| Northern New JerseyNew Jersey | $301.60 | — |
| Rest of New JerseyNew Jersey | $285.26 | — |
| NevadaNevada | $262.32 | — |
| NYC suburbs and Long Island, NYNew York | $310.47 | — |
| Poughkeepsie and northern NYC suburbs, NYNew York | $286.39 | — |
| Queens, NYNew York | $307.74 | — |
| Rest of New YorkNew York | $250.13 | — |
| OhioOhio | $242.36 | — |
| OklahomaOklahoma | $237.10 | — |
| Portland, OROregon | $288.06 | — |
| Rest of OregonOregon | $260.81 | — |
| Metropolitan Philadelphia, PAPennsylvania | $273.06 | — |
| Rest of PennsylvaniaPennsylvania | $243.35 | — |
| Puerto RicoPuerto Rico | $265.04 | — |
| Rhode IslandRhode Island | $270.43 | — |
| South CarolinaSouth Carolina | $244.49 | — |
| South DakotaSouth Dakota | $260.76 | — |
| TennesseeTennessee | $240.17 | — |
| Austin, TXTexas | $275.75 | — |
| Beaumont, TXTexas | $241.45 | — |
| Brazoria, TXTexas | $260.08 | — |
| Dallas, TXTexas | $261.47 | — |
| Fort Worth, TXTexas | $259.19 | — |
| Galveston, TXTexas | $260.67 | — |
| Houston, TXTexas | $262.13 | — |
| Rest of TexasTexas | $250.43 | — |
| UtahUtah | $248.33 | — |
| VirginiaVirginia | $257.80 | — |
| Virgin Islands, VIUnited States Virgin Islands | $265.04 | — |
| VermontVermont | $258.89 | — |
| Rest of WashingtonWashington | $274.56 | — |
| King County, WAWashington | $316.12 | — |
| WisconsinWisconsin | $250.93 | — |
| West VirginiaWest Virginia | $233.27 | — |
| WyomingWyoming | $261.84 | — |
93898 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.
$228.50
$325.50
Color shows the midpoint of each state’s locality range.
View every state and territory as a table
| State / territory | Office rate range | Localities |
|---|---|---|
| AK | $290.28 | 1 |
| AL | $232.35 | 1 |
| AR | $228.50 | 1 |
| AZ | $254.95 | 1 |
| CA | $284.05–$366.94 | 29 |
| CO | $277.14 | 1 |
| CT | $281.52 | 1 |
| DC | $305.65 | 1 |
| DE | $259.61 | 1 |
| FL | $253.66–$276.13 | 3 |
| GA | $237.97–$266.87 | 2 |
| GU | $293.21 | 1 |
| HI | $293.21 | 1 |
| IA | $241.19 | 1 |
| ID | $242.55 | 1 |
| IL | $243.84–$271.06 | 4 |
| IN | $244.21 | 1 |
| KS | $238.92 | 1 |
| KY | $236.54 | 1 |
| LA | $235.72–$249.20 | 2 |
| MA | $274.74–$308.41 | 2 |
| MD | $265.37–$305.65 | 3 |
| ME | $242.95–$259.46 | 2 |
| MI | $242.68–$256.24 | 2 |
| MN | $267.38 | 1 |
| MO | $230.43–$251.39 | 3 |
| MS | $229.57 | 1 |
| MT | $262.53 | 1 |
| NC | $246.01 | 1 |
| ND | $260.94 | 1 |
| NE | $242.99 | 1 |
| NH | $271.71 | 1 |
| NJ | $285.26–$301.60 | 2 |
| NM | $243.80 | 1 |
| NV | $262.32 | 1 |
| NY | $250.13–$310.47 | 5 |
| OH | $242.36 | 1 |
| OK | $237.10 | 1 |
| OR | $260.81–$288.06 | 2 |
| PA | $243.35–$273.06 | 2 |
| PR | $265.04 | 1 |
| RI | $270.43 | 1 |
| SC | $244.49 | 1 |
| SD | $260.76 | 1 |
| TN | $240.17 | 1 |
| TX | $241.45–$275.75 | 8 |
| UT | $248.33 | 1 |
| VA | $257.80–$305.65 | 2 |
| VI | $265.04 | 1 |
| VT | $258.89 | 1 |
| WA | $274.56–$316.12 | 2 |
| WI | $250.93 | 1 |
| WV | $233.27 | 1 |
| WY | $261.84 | 1 |
How the 93898 rate is calculated
Each of 93898’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 · 93898
RVUs × geographic indexes × conversion factor
Work0.83
0.83 RVUs× 1.000 GPCI
Practice expense6.95
6.95 RVUs× 1.000 GPCI
Malpractice0.08
0.08 RVUs× 1.000 GPCI
Adjusted RVUs
7.8600
Conversion factor
$33.4009
Medicare rate
$262.53
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
The exact New Mexico inputs and CMS source lines
PPRRVU2026_Oct_nonQPP.csv
12,302
- Code
- 93898
- Physician work
- 0.83
- Practice expense
- 6.95
- Malpractice
- 0.08
GPCI2026.csv
77
- Locality
- New Mexico
- Physician work
- 1.000
- Practice expense
- 0.917
- Malpractice
- 1.201
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 0.83 | × 1.000 | 0.8300 |
| Practice expense | 6.95 | × 0.917 | 6.3732 |
| Malpractice | 0.08 | × 1.201 | 0.0961 |
| Total RVUs | 7.2992 | ||
| Conversion factor | × 33.4009 | ||
Office rate, New Mexico$243.80
Office: (0.83 × 1 + 6.95 × 0.917 + 0.08 × 1.201) × $33.4009 = $243.80
Payment rules and modifiers for 93898
The CMS indicators that decide how 93898 is paid alongside other services.
CMS payment indicators · 93898
Shunt detection, IV microbubble injection
| Rule | CMS value | What it means |
|---|---|---|
| Global period | ZZZ | Add-on code: falls within the primary procedure’s global period. |
| Multiple procedures | 0 | No multiple-procedure reduction. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 0 | Not paid without supporting documentation. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 1 | Diagnostic test with separate professional (26) and technical (TC) components. |
What modifiers do to the payment
Modifier 26 · payment effect
With and without the modifier
93898 without 26 · national office
$262.53
Shunt detection, IV microbubble injection
93898-26 · Professional component
$44.09
Pays only the interpretation and report.
How 93898 has changed in New Mexico
93898 · Office / nonfacility
$243.80
Effective 2026-10-01
The base rate is $33.61 higher than on 2025-10-01, moving from $210.19 to $243.80 (16.0%).
It is unchanged from the immediately preceding available release, effective 2026-07-01.
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
January 1, 2026
RVU26A
$210.19changed to$243.80
- Conversion factor 32.3465 changed to 33.4009
- Work RVU 0.85 changed to 0.83
- Practice expense RVU 6.13 changed to 6.95
- Malpractice RVU 0.07 changed to 0.08
- Practice expense GPCI 0.908 changed to 0.917
- Malpractice GPCI 1.172 changed to 1.201
Held through RVU26B, RVU26C, RVU26D.
January 1, 2025
RVU25A
No ratechanged to$210.19
Held through RVU25B, RVU25C, RVU25D.
January 1, 2013
RVU13AR
Earliest loaded release: No rate
Held through RVU13B, RVU13C, RVU13D, RVU14A, RVU14B, RVU14C, RVU14D, RVU15A, RVU15B, RVU15C, RVU15D, RVU16A, RVU16B, RVU16C, RVU16D, RVU17A, RVU17B, RVU17C, RVU17D, RVU18AR1, RVU18B, RVU18C, RVU18D, RVU19A, RVU19B, RVU19C, RVU19D, RVU20A, RVU20B, RVU20C, RVU20D, RVU21A, RVU21B, RVU21C, RVU21D, RVU22A, RVU22B, RVU22C, RVU22D, RVU23A, RVU23B, RVU23C, RVU23D, RVU24A, RVU24AR, RVU24B, RVU24C, RVU24D.
| Effective from | Office | Facility | CMS release |
|---|---|---|---|
| 2026-10-01 | $243.80 | Not available in this setting | RVU26D |
| 2026-07-01 | $243.80 | Not available in this setting | RVU26C |
| 2026-04-01 | $243.80 | Not available in this setting | RVU26B |
| 2026-01-01 | $243.80 | Not available in this setting | RVU26A |
| 2025-10-01 | $210.19 | Not available in this setting | RVU25D |
| 2025-07-01 | $210.19 | Not available in this setting | RVU25C |
| 2025-04-01 | $210.19 | Not available in this setting | RVU25B |
| 2025-01-01 | $210.19 | Not available in this setting | RVU25A |
| 2024-10-01 | Not in this release | Not in this release | RVU24D |
| 2024-07-01 | Not in this release | Not in this release | RVU24C |
| 2024-04-01 | Not in this release | Not in this release | RVU24B |
| 2024-03-09 | Not in this release | Not in this release | RVU24AR |
| 2024-01-01 | Not in this release | Not in this release | RVU24A |
| 2023-10-01 | Not in this release | Not in this release | RVU23D |
| 2023-07-01 | Not in this release | Not in this release | RVU23C |
| 2023-04-01 | Not in this release | Not in this release | RVU23B |
| 2023-01-01 | Not in this release | Not in this release | RVU23A |
| 2022-10-01 | Not in this release | Not in this release | RVU22D |
| 2022-07-01 | Not in this release | Not in this release | RVU22C |
| 2022-04-01 | Not in this release | Not in this release | RVU22B |
| 2022-01-01 | Not in this release | Not in this release | RVU22A |
| 2021-10-01 | Not in this release | Not in this release | RVU21D |
| 2021-07-01 | Not in this release | Not in this release | RVU21C |
| 2021-04-01 | Not in this release | Not in this release | RVU21B |
| 2021-01-01 | Not in this release | Not in this release | RVU21A |
| 2020-10-01 | Not in this release | Not in this release | RVU20D |
| 2020-07-01 | Not in this release | Not in this release | RVU20C |
| 2020-04-01 | Not in this release | Not in this release | RVU20B |
| 2020-01-01 | Not in this release | Not in this release | RVU20A |
| 2019-10-01 | Not in this release | Not in this release | RVU19D |
| 2019-07-01 | Not in this release | Not in this release | RVU19C |
| 2019-04-01 | Not in this release | Not in this release | RVU19B |
| 2019-01-01 | Not in this release | Not in this release | RVU19A |
| 2018-10-01 | Not in this release | Not in this release | RVU18D |
| 2018-07-01 | Not in this release | Not in this release | RVU18C |
| 2018-04-01 | Not in this release | Not in this release | RVU18B |
| 2018-01-01 | Not in this release | Not in this release | RVU18AR1 |
| 2017-10-01 | Not in this release | Not in this release | RVU17D |
| 2017-07-01 | Not in this release | Not in this release | RVU17C |
| 2017-04-01 | Not in this release | Not in this release | RVU17B |
| 2017-01-01 | Not in this release | Not in this release | RVU17A |
| 2016-10-01 | Not in this release | Not in this release | RVU16D |
| 2016-07-01 | Not in this release | Not in this release | RVU16C |
| 2016-04-01 | Not in this release | Not in this release | RVU16B |
| 2016-01-01 | Not in this release | Not in this release | RVU16A |
| 2015-10-01 | Not in this release | Not in this release | RVU15D |
| 2015-07-01 | Not in this release | Not in this release | RVU15C |
| 2015-04-01 | Not in this release | Not in this release | RVU15B |
| 2015-01-01 | Not in this release | Not in this release | RVU15A |
| 2014-10-01 | Not in this release | Not in this release | RVU14D |
| 2014-07-01 | Not in this release | Not in this release | RVU14C |
| 2014-04-01 | Not in this release | Not in this release | RVU14B |
| 2014-01-01 | Not in this release | Not in this release | RVU14A |
| 2013-10-01 | Not in this release | Not in this release | RVU13D |
| 2013-07-01 | Not in this release | Not in this release | RVU13C |
| 2013-04-01 | Not in this release | Not in this release | RVU13B |
| 2013-01-01 | Not in this release | Not in this release | 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
93898 billing questions
Can 93898 be reported by itself?
No. It is an add-on code and must be reported with the primary procedure, 93893.
How is 93898 different from 93893?
93893 is the primary transcranial Doppler shunt study. Report 93898 with it for the shunt-detection service involving intravenous microbubble injection.
Which modifiers identify the professional and technical components?
Use modifier 26 for the professional interpretation and modifier TC for the technical service. Without either modifier, the claim represents the global service.
What documentation supports reporting 93898?
Document the clinical reason for shunt evaluation, the intravenous microbubble administration, transcranial Doppler monitoring, and the interpreted findings.
Is payment for 93898 separate from the primary procedure’s global period?
No. CMS treats this add-on payment as falling within the primary procedure’s global period.
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
Show the CMS file lines behind this rate
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