CPT code 93978: Vascular duplex, complete central vessel study2026 Medicare rate & RVUs in Marin County, CA
Reports a complete duplex evaluation of the aorta, vena cava, iliac vessels, or a related bypass graft for vascular disease assessment.
In Marin County, CA, Medicare pays $241.66 for 93978 in the office.
Check a contract rate as a % of Medicare · 93978 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 93978 covers
This service uses duplex ultrasound to assess blood flow and vessel structure in the aorta, inferior vena cava, iliac vessels, or a related bypass graft. Vascular sonographers commonly acquire the images in an outpatient vascular laboratory or hospital department; a qualified physician interprets the study. Clinical uses include assessment of suspected aortoiliac disease, surveillance of an aneurysm, evaluation of a graft, or investigation of suspected caval obstruction or thrombosis.
Select this code when the documented examination is complete for the relevant vessel or graft; use 93979 when the examination is limited. The report should identify the anatomy examined and include findings supporting the complete evaluation. The service may be billed globally, or split into interpretation with modifier 26 and equipment-and-staff services with modifier TC. When multiple cardiovascular diagnostic procedures are performed, the multiple procedure reduction applies to the technical component.
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 Marin County, CA compares for 93978
Across 109 of 109 payment localities, the office rate for 93978 runs from $157.00 in Arkansas to $247.20 in San Benito County, CA. Marin County, CA pays $241.66. The RVUs are the same everywhere; the geographic indexes change the dollars.
- Marin County, CA · this page$241.66
- Bakersfield, CA · California$193.40−$48.26
- Chico, CA · California$193.00−$48.66
- El Centro, CA · California$193.03−$48.63
- Fresno, CA · California$193.00−$48.66
- Hanford, CA · California$193.00−$48.66
- Los Angeles, CA · California$207.25−$34.41
Other areas in California first, then benchmark localities. Bars start at $0.
Every other payment area
| Payment locality | Office | Facility |
|---|---|---|
| Madera, CACalifornia | $193.00 | — |
| Merced, CACalifornia | $193.00 | — |
| Modesto, CACalifornia | $193.00 | — |
| Napa, CACalifornia | $227.29 | — |
| Oxnard, CACalifornia | $206.57 | — |
| Redding, CACalifornia | $193.00 | — |
| Rest of CaliforniaCalifornia | $193.00 | — |
| Riverside, CACalifornia | $194.51 | — |
| Sacramento, CACalifornia | $203.52 | — |
| Salinas, CACalifornia | $202.79 | — |
| San Diego, CACalifornia | $208.33 | — |
| San Francisco, CACalifornia | $241.50 | — |
| San Benito County, CACalifornia | $247.20 | — |
| Santa Clara County, CACalifornia | $246.55 | — |
| San Luis Obispo, CACalifornia | $199.44 | — |
| Santa Cruz, CACalifornia | $210.91 | — |
| Santa Maria, CACalifornia | $203.76 | — |
| Santa Rosa, CACalifornia | $213.09 | — |
| Stockton, CACalifornia | $193.00 | — |
| Vallejo, CACalifornia | $227.06 | — |
| Visalia, CACalifornia | $193.00 | — |
| Yuba City, CACalifornia | $193.00 | — |
| Washington, DC areaDistrict of Columbia | $208.94 | — |
| Miami, FLFlorida | $193.65 | — |
| Chicago, ILIllinois | $187.35 | — |
| Manhattan, NYNew York | $209.01 | — |
| AlaskaAlaska | $201.02 | — |
| AlabamaAlabama | $159.63 | — |
| ArkansasArkansas | $157.00 | — |
| ArizonaArizona | $175.05 | — |
| ColoradoColorado | $189.23 | — |
| ConnecticutConnecticut | $193.39 | — |
| DelawareDelaware | $178.23 | — |
| Fort Lauderdale, FLFlorida | $186.09 | — |
| Rest of FloridaFlorida | $176.13 | — |
| Atlanta, GAGeorgia | $183.78 | — |
| Rest of GeorgiaGeorgia | $165.10 | — |
| Hawaii, Guam, HIHawaii | $198.90 | — |
| IowaIowa | $164.83 | — |
| IdahoIdaho | $165.93 | — |
| East St. Louis, ILIllinois | $173.14 | — |
| Rest of IllinoisIllinois | $169.98 | — |
| Suburban Chicago, ILIllinois | $188.20 | — |
| IndianaIndiana | $167.04 | — |
| KansasKansas | $163.68 | — |
| KentuckyKentucky | $163.36 | — |
| New Orleans, LALouisiana | $172.17 | — |
| Rest of LouisianaLouisiana | $162.96 | — |
| Metropolitan Boston, MAMassachusetts | $209.95 | — |
| Rest of MassachusettsMassachusetts | $187.76 | — |
| Baltimore area, MDMaryland | $192.81 | — |
| Rest of MarylandMaryland | $182.04 | — |
| Rest of MaineMaine | $166.63 | — |
| Southern Maine, MEMaine | $177.29 | — |
| Detroit, MIMichigan | $178.34 | — |
| Rest of MichiganMichigan | $167.95 | — |
| MinnesotaMinnesota | $181.41 | — |
| Metropolitan Kansas City, MOMissouri | $171.13 | — |
| Metropolitan St. Louis, MOMissouri | $173.19 | — |
| Rest of MissouriMissouri | $159.59 | — |
| MississippiMississippi | $158.34 | — |
| MontanaMontana | $180.36 | — |
| North CarolinaNorth Carolina | $168.65 | — |
| North DakotaNorth Dakota | $177.59 | — |
| NebraskaNebraska | $165.93 | — |
| New HampshireNew Hampshire | $185.92 | — |
| Northern New JerseyNew Jersey | $206.27 | — |
| Rest of New JerseyNew Jersey | $195.63 | — |
| New MexicoNew Mexico | $168.88 | — |
| NevadaNevada | $179.73 | — |
| NYC suburbs and Long Island, NYNew York | $214.32 | — |
| Poughkeepsie and northern NYC suburbs, NYNew York | $196.73 | — |
| Queens, NYNew York | $211.33 | — |
| Rest of New YorkNew York | $171.49 | — |
| OhioOhio | $167.38 | — |
| OklahomaOklahoma | $163.31 | — |
| Portland, OROregon | $196.19 | — |
| Rest of OregonOregon | $178.38 | — |
| Metropolitan Philadelphia, PAPennsylvania | $187.87 | — |
| Rest of PennsylvaniaPennsylvania | $167.84 | — |
| Puerto RicoPuerto Rico | $181.94 | — |
| Rhode IslandRhode Island | $185.29 | — |
| South CarolinaSouth Carolina | $168.29 | — |
| South DakotaSouth Dakota | $177.26 | — |
| TennesseeTennessee | $164.58 | — |
| Austin, TXTexas | $188.56 | — |
| Beaumont, TXTexas | $166.57 | — |
| Brazoria, TXTexas | $178.20 | — |
| Dallas, TXTexas | $179.34 | — |
| Fort Worth, TXTexas | $177.90 | — |
| Galveston, TXTexas | $178.72 | — |
| Houston, TXTexas | $181.28 | — |
| Rest of TexasTexas | $172.28 | — |
| UtahUtah | $170.91 | — |
| VirginiaVirginia | $176.45 | — |
| Virgin Islands, VIUnited States Virgin Islands | $181.94 | — |
| VermontVermont | $176.56 | — |
| Rest of WashingtonWashington | $187.52 | — |
| King County, WAWashington | $214.78 | — |
| WisconsinWisconsin | $170.84 | — |
| West VirginiaWest Virginia | $162.78 | — |
| WyomingWyoming | $179.15 | — |
93978 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.
$157.00
$220.10
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 | $201.02 | 1 |
| AL | $159.63 | 1 |
| AR | $157.00 | 1 |
| AZ | $175.05 | 1 |
| CA | $193.00–$247.20 | 29 |
| CO | $189.23 | 1 |
| CT | $193.39 | 1 |
| DC | $208.94 | 1 |
| DE | $178.23 | 1 |
| FL | $176.13–$193.65 | 3 |
| GA | $165.10–$183.78 | 2 |
| GU | $198.90 | 1 |
| HI | $198.90 | 1 |
| IA | $164.83 | 1 |
| ID | $165.93 | 1 |
| IL | $169.98–$188.20 | 4 |
| IN | $167.04 | 1 |
| KS | $163.68 | 1 |
| KY | $163.36 | 1 |
| LA | $162.96–$172.17 | 2 |
| MA | $187.76–$209.95 | 2 |
| MD | $182.04–$208.94 | 3 |
| ME | $166.63–$177.29 | 2 |
| MI | $167.95–$178.34 | 2 |
| MN | $181.41 | 1 |
| MO | $159.59–$173.19 | 3 |
| MS | $158.34 | 1 |
| MT | $180.36 | 1 |
| NC | $168.65 | 1 |
| ND | $177.59 | 1 |
| NE | $165.93 | 1 |
| NH | $185.92 | 1 |
| NJ | $195.63–$206.27 | 2 |
| NM | $168.88 | 1 |
| NV | $179.73 | 1 |
| NY | $171.49–$214.32 | 5 |
| OH | $167.38 | 1 |
| OK | $163.31 | 1 |
| OR | $178.38–$196.19 | 2 |
| PA | $167.84–$187.87 | 2 |
| PR | $181.94 | 1 |
| RI | $185.29 | 1 |
| SC | $168.29 | 1 |
| SD | $177.26 | 1 |
| TN | $164.58 | 1 |
| TX | $166.57–$188.56 | 8 |
| UT | $170.91 | 1 |
| VA | $176.45–$208.94 | 2 |
| VI | $181.94 | 1 |
| VT | $176.56 | 1 |
| WA | $187.52–$214.78 | 2 |
| WI | $170.84 | 1 |
| WV | $162.78 | 1 |
| WY | $179.15 | 1 |
How the 93978 rate is calculated
Each of 93978’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 · 93978
RVUs × geographic indexes × conversion factor
Work0.78
0.78 RVUs× 1.000 GPCI
Practice expense4.48
4.48 RVUs× 1.000 GPCI
Malpractice0.14
0.14 RVUs× 1.000 GPCI
Adjusted RVUs
5.4000
Conversion factor
$33.4009
Medicare rate
$180.36
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
The exact Marin County, CA inputs and CMS source lines
PPRRVU2026_Oct_nonQPP.csv
12,338
- Code
- 93978
- Physician work
- 0.78
- Practice expense
- 4.48
- Malpractice
- 0.14
GPCI2026.csv
25
- Locality
- Marin County, CA
- Physician work
- 1.095
- Practice expense
- 1.410
- Malpractice
- 0.459
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 0.78 | × 1.095 | 0.8541 |
| Practice expense | 4.48 | × 1.410 | 6.3168 |
| Malpractice | 0.14 | × 0.459 | 0.0643 |
| Total RVUs | 7.2352 | ||
| Conversion factor | × 33.4009 | ||
Office rate, Marin County, CA$241.66
Office: (0.78 × 1.095 + 4.48 × 1.41 + 0.14 × 0.459) × $33.4009 = $241.66
Payment rules and modifiers for 93978
The CMS indicators that decide how 93978 is paid alongside other services.
CMS payment indicators · 93978
Vascular duplex, complete central vessel study
| Rule | CMS value | What it means |
|---|---|---|
| Global period | XXX | The global surgery concept doesn’t apply. |
| Multiple procedures | 6 | Diagnostic cardiovascular reduction applies to the technical component. |
| 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
93978 without 26 · national office
$180.36
Vascular duplex, complete central vessel study
93978-26 · Professional component
$37.41
Pays only the interpretation and report.
How 93978 has changed in Marin County, CA
93978 · Office / nonfacility
$241.66
Effective 2026-10-01
The base rate is $7.89 higher than on 2025-10-01, moving from $233.77 to $241.66 (3.4%).
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
$233.77changed to$241.66
- Conversion factor 32.3465 changed to 33.4009
- Work RVU 0.80 changed to 0.78
- Practice expense RVU 4.43 changed to 4.48
- Malpractice RVU 0.15 changed to 0.14
- Work GPCI 1.088 changed to 1.095
- Practice expense GPCI 1.419 changed to 1.410
- Malpractice GPCI 0.470 changed to 0.459
Held through RVU26B, RVU26C, RVU26D.
January 1, 2025
RVU25A
$242.62changed to$233.77
- Conversion factor 33.2875 changed to 32.3465
- Practice expense RVU 4.48 changed to 4.43
- Malpractice RVU 0.13 changed to 0.15
Held through RVU25B, RVU25C, RVU25D.
March 9, 2024
RVU24AR
$238.66changed to$242.62
- Conversion factor 32.7442 changed to 33.2875
Held through RVU24B, RVU24C, RVU24D.
January 1, 2024
RVU24A
$239.77changed to$238.66
- Conversion factor 33.8872 changed to 32.7442
- Practice expense RVU 4.47 changed to 4.48
- Malpractice RVU 0.14 changed to 0.13
- Work GPCI 1.082 changed to 1.088
- Practice expense GPCI 1.374 changed to 1.419
- Malpractice GPCI 0.487 changed to 0.470
January 1, 2023
RVU23A
$239.68changed to$239.77
- Conversion factor 34.6062 changed to 33.8872
- Practice expense RVU 4.51 changed to 4.47
- Work GPCI 1.077 changed to 1.082
- Practice expense GPCI 1.329 changed to 1.374
- Malpractice GPCI 0.504 changed to 0.487
Held through RVU23B, RVU23C, RVU23D.
January 1, 2022
RVU22A
$242.89changed to$239.68
- Conversion factor 34.8931 changed to 34.6062
- Practice expense RVU 4.61 changed to 4.51
- Malpractice RVU 0.12 changed to 0.14
- Work GPCI 1.071 changed to 1.077
- Practice expense GPCI 1.311 changed to 1.329
Held through RVU22B, RVU22C, RVU22D.
January 1, 2021
RVU21A
$239.49changed to$242.89
- Conversion factor 36.0896 changed to 34.8931
- Practice expense RVU 4.41 changed to 4.61
- Malpractice RVU 0.11 changed to 0.12
- Work GPCI 1.068 changed to 1.071
- Practice expense GPCI 1.299 changed to 1.311
- Malpractice GPCI 0.481 changed to 0.504
Held through RVU21B, RVU21C, RVU21D.
January 1, 2020
RVU20A
$238.63changed to$239.49
- Conversion factor 36.0391 changed to 36.0896
- Practice expense RVU 4.43 changed to 4.41
- Work GPCI 1.065 changed to 1.068
- Practice expense GPCI 1.291 changed to 1.299
- Malpractice GPCI 0.458 changed to 0.481
Held through RVU20B, RVU20C, RVU20D.
January 1, 2019
RVU19A
$242.82changed to$238.63
- Conversion factor 35.9996 changed to 36.0391
- Practice expense RVU 4.57 changed to 4.43
- Work GPCI 1.062 changed to 1.065
- Practice expense GPCI 1.279 changed to 1.291
Held through RVU19B, RVU19C, RVU19D.
January 1, 2018
RVU18AR1
$237.07changed to$242.82
- Conversion factor 35.8887 changed to 35.9996
- Practice expense RVU 4.49 changed to 4.57
- Work GPCI 1.058 changed to 1.062
- Practice expense GPCI 1.271 changed to 1.279
- Malpractice GPCI 0.477 changed to 0.458
Held through RVU18B, RVU18C, RVU18D.
January 1, 2017
RVU17A
No ratechanged to$237.07
Held through RVU17B, RVU17C, RVU17D.
January 1, 2016
RVU16A
No ratechanged toNo rate
Held through RVU16B, RVU16C, RVU16D.
January 1, 2015
RVU15A
No ratechanged toNo rate
Held through RVU15B, RVU15C, RVU15D.
January 1, 2013
RVU13AR
Earliest loaded release: No rate
Held through RVU13B, RVU13C, RVU13D, RVU14A, RVU14B, RVU14C, RVU14D.
| Effective from | Office | Facility | CMS release |
|---|---|---|---|
| 2026-10-01 | $241.66 | Not available in this setting | RVU26D |
| 2026-07-01 | $241.66 | Not available in this setting | RVU26C |
| 2026-04-01 | $241.66 | Not available in this setting | RVU26B |
| 2026-01-01 | $241.66 | Not available in this setting | RVU26A |
| 2025-10-01 | $233.77 | Not available in this setting | RVU25D |
| 2025-07-01 | $233.77 | Not available in this setting | RVU25C |
| 2025-04-01 | $233.77 | Not available in this setting | RVU25B |
| 2025-01-01 | $233.77 | Not available in this setting | RVU25A |
| 2024-10-01 | $242.62 | Not available in this setting | RVU24D |
| 2024-07-01 | $242.62 | Not available in this setting | RVU24C |
| 2024-04-01 | $242.62 | Not available in this setting | RVU24B |
| 2024-03-09 | $242.62 | Not available in this setting | RVU24AR |
| 2024-01-01 | $238.66 | Not available in this setting | RVU24A |
| 2023-10-01 | $239.77 | Not available in this setting | RVU23D |
| 2023-07-01 | $239.77 | Not available in this setting | RVU23C |
| 2023-04-01 | $239.77 | Not available in this setting | RVU23B |
| 2023-01-01 | $239.77 | Not available in this setting | RVU23A |
| 2022-10-01 | $239.68 | Not available in this setting | RVU22D |
| 2022-07-01 | $239.68 | Not available in this setting | RVU22C |
| 2022-04-01 | $239.68 | Not available in this setting | RVU22B |
| 2022-01-01 | $239.68 | Not available in this setting | RVU22A |
| 2021-10-01 | $242.89 | Not available in this setting | RVU21D |
| 2021-07-01 | $242.89 | Not available in this setting | RVU21C |
| 2021-04-01 | $242.89 | Not available in this setting | RVU21B |
| 2021-01-01 | $242.89 | Not available in this setting | RVU21A |
| 2020-10-01 | $239.49 | Not available in this setting | RVU20D |
| 2020-07-01 | $239.49 | Not available in this setting | RVU20C |
| 2020-04-01 | $239.49 | Not available in this setting | RVU20B |
| 2020-01-01 | $239.49 | Not available in this setting | RVU20A |
| 2019-10-01 | $238.63 | Not available in this setting | RVU19D |
| 2019-07-01 | $238.63 | Not available in this setting | RVU19C |
| 2019-04-01 | $238.63 | Not available in this setting | RVU19B |
| 2019-01-01 | $238.63 | Not available in this setting | RVU19A |
| 2018-10-01 | $242.82 | Not available in this setting | RVU18D |
| 2018-07-01 | $242.82 | Not available in this setting | RVU18C |
| 2018-04-01 | $242.82 | Not available in this setting | RVU18B |
| 2018-01-01 | $242.82 | Not available in this setting | RVU18AR1 |
| 2017-10-01 | $237.07 | Not available in this setting | RVU17D |
| 2017-07-01 | $237.07 | Not available in this setting | RVU17C |
| 2017-04-01 | $237.07 | Not available in this setting | RVU17B |
| 2017-01-01 | $237.07 | Not available in this setting | RVU17A |
| 2016-10-01 | Additional calculation required | Not available in this setting | RVU16D |
| 2016-07-01 | Additional calculation required | Not available in this setting | RVU16C |
| 2016-04-01 | Additional calculation required | Not available in this setting | RVU16B |
| 2016-01-01 | Additional calculation required | Not available in this setting | RVU16A |
| 2015-10-01 | Rate data unavailable | Not available in this setting | RVU15D |
| 2015-07-01 | Rate data unavailable | Not available in this setting | RVU15C |
| 2015-04-01 | Rate data unavailable | Not available in this setting | RVU15B |
| 2015-01-01 | Rate data unavailable | Not available in this setting | RVU15A |
| 2014-10-01 | Additional calculation required | Not available in this setting | RVU14D |
| 2014-07-01 | Additional calculation required | Not available in this setting | RVU14C |
| 2014-04-01 | Additional calculation required | Not available in this setting | RVU14B |
| 2014-01-01 | Additional calculation required | Not available in this setting | RVU14A |
| 2013-10-01 | Additional calculation required | Not available in this setting | RVU13D |
| 2013-07-01 | Additional calculation required | Not available in this setting | RVU13C |
| 2013-04-01 | Additional calculation required | Not available in this setting | RVU13B |
| 2013-01-01 | Additional calculation required | Not available in this setting | RVU13AR |
Where the Marin County, CA rate applies
Marin County, CA is a Medicare payment area, not a city. Our Census mapping connects it to 31 cities and communities in California. Some span more than one payment area; confirm with the service ZIP.
- Alto
- Belvedere
- Black Point-Green Point
- Bolinas
- Corte Madera
- Dillon Beach
- Fairfax
- Inverness
93978 billing questions
How does this differ from 93979?
93978 represents a complete evaluation of the relevant aortic, caval, iliac, or graft anatomy. Use 93979 for a limited examination.
Can the professional and technical services be billed separately?
Yes. Report modifier 26 for the professional interpretation or TC for the technical service; billing without either modifier represents the global service.
What documentation supports the complete-study code?
Document the clinical indication, the vessel or graft examined, and findings that support a complete evaluation of that anatomy.
What happens when another cardiovascular diagnostic test is performed?
The multiple procedure reduction applies to the technical component. It does not change the professional component.
Is this the code for a visceral artery duplex?
No. This code addresses the aorta, inferior vena cava, iliac vessels, or a related bypass graft; 93975 and 93976 address a different abdominal or pelvic vascular study.
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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