CPT code 93931: Arterial duplex, unilateral or limited study2026 Medicare rate & RVUs in Missouri
Duplex ultrasound evaluates arteries or an arterial bypass graft in one upper extremity, or a limited portion of the upper extremity arterial system.
Medicare pays $106.75–$116.01 for 93931 in the office in Missouri, from Rest of Missouri to Metropolitan St. Louis, MO. Which amount applies depends on the service address.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
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On this page 9 sections
What 93931 covers
This service uses ultrasound imaging and Doppler assessment to evaluate blood flow in upper extremity arteries or an arterial bypass graft. It may help investigate arm or hand ischemia, diminished pulses, or suspected arterial narrowing or blockage. A vascular sonographer typically acquires the images and waveforms in a vascular laboratory or imaging department, and a qualified practitioner interprets the study.
Report 93931 for a unilateral examination or a limited study; a complete bilateral examination is represented by 93930. Documentation should identify the side and extent examined, the clinical reason, and the findings supporting the interpretation. The service may be billed globally when one entity provides both portions, or split with modifier 26 for the professional interpretation and modifier TC for the technical service, including equipment and staff. 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.
Where 93931 pays more and less in Missouri
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
3 payment localities
$106.75 to $116.01
| Payment locality | Office | Facility |
|---|---|---|
| Metropolitan Kansas City, MO | $114.62 | Unavailable |
| Metropolitan St. Louis, MO | $116.01 | Unavailable |
| Rest of Missouri | $106.75 | Unavailable |
How the 93931 rate is calculated
Each of 93931’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 · 93931
RVUs × geographic indexes × conversion factor
Work0.49
0.49 RVUs× 1.000 GPCI
Practice expense3.06
3.06 RVUs× 1.000 GPCI
Malpractice0.07
0.07 RVUs× 1.000 GPCI
Adjusted RVUs
3.6200
Conversion factor
$33.4009
Medicare rate
$120.91
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 93931
The CMS indicators that decide how 93931 is paid alongside other services.
CMS payment indicators · 93931
Arterial duplex, unilateral or limited 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
93931 without 26 · national office
$120.91
Arterial duplex, unilateral or limited study
93931-26 · Professional component
$22.71
Pays only the interpretation and report.
93931 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 93930Arm arterial duplexComplete bilateral study
- 93930 is for a complete bilateral upper extremity arterial duplex. Choose 93931 for a unilateral examination or a limited study.
- 93922Arterial studyOne or two levels
- 93922 reports limited physiologic arterial testing at two levels, rather than duplex imaging of upper extremity arteries or a bypass graft.
- 93923Arterial physiologyThree or more levels
- 93923 reports physiologic arterial testing at three or more levels. Use 93931 when the service is an upper extremity arterial duplex.
93931 billing questions
When should 93930 be reported instead?
Use 93930 for a complete bilateral upper extremity arterial duplex examination. Use 93931 for a unilateral examination or a limited study.
What do modifiers 26 and TC represent?
Modifier 26 identifies the professional interpretation, while modifier TC identifies the technical service, including equipment and staff. Without either modifier, the claim represents the global service.
Does the multiple procedure reduction affect both components?
The cardiovascular diagnostic multiple procedure reduction applies to the technical component of this service.
How should the report support 93931?
Document the clinical indication, side and arterial territory examined, relevant images or Doppler findings, and the interpretation. The record should make clear why the study was unilateral or limited.
How does 93931 differ from 93922 or 93923?
93931 describes duplex imaging and Doppler evaluation of upper extremity arteries or a bypass graft. Codes 93922 and 93923 describe physiologic arterial testing organized by the number of levels assessed.
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.
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