Billing code 93979: Vascular duplexMedicare rate & RVUs in Oregon
Reports a focused duplex ultrasound assessment of abdominal aortic, caval, iliac, or related bypass-graft vasculature rather than a complete study.
Medicare pays $115.39–$126.97 for 93979 in the office in Oregon, from Rest Of Oregon to Portland. 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.
On this page 9 sections
What 93979 covers
This code represents a limited duplex ultrasound assessment of the aorta, inferior vena cava, iliac vessels, or a related bypass graft. The exam uses ultrasound imaging and Doppler flow analysis to evaluate the specified vascular area. Vascular laboratories, radiology departments, and physician offices may perform the study for a focused clinical question, such as follow-up of a known abdominal vascular abnormality or assessment of a graft. The documented anatomy and scope distinguish a limited study from a complete examination.
Report the code when the performed study is limited in scope; the record should identify the vessel or graft examined, the clinical indication, and the findings supporting the evaluation. CMS recognizes professional and technical components: report modifier 26 for interpretation only, modifier TC for equipment and staff, or no component modifier for the global service. The cardiovascular diagnostic multiple procedure reduction applies to the technical component when applicable. The global service includes both components.
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 93979 pays more and less in Oregon
| Payment locality | Office | Facility |
|---|---|---|
| Portland | $126.97 | Unavailable |
| Rest Of Oregon | $115.39 | Unavailable |
How the 93979 rate is calculated
Each of 93979’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 · 93979
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 0.49Practice expense 2.92Malpractice 0.08
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 93979
The CMS indicators that decide how 93979 is paid alongside other services.
CMS payment indicators · 93979
Vascular duplex
| 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
93979 without 26 · national office
$116.57
Vascular duplex
93979-26 · Professional component
$23.05
Pays only the interpretation and report.
93979 compared with similar codes
Compare codes
93979 vs 93978 vs 93975 vs 93976: national Medicare rates
Swap in your local Medicare rate.
How to choose
- 93978Vascular duplex
- Use 93979 for a limited examination and 93978 for a complete examination of the applicable abdominal vessels or related graft.
- 93975Vascular duplex
- 93975 evaluates visceral organ vascular flow; 93979 addresses a limited study of the aorta, IVC, iliac vasculature, or a related bypass graft.
- 93976Vascular study
- 93976 is the limited visceral vascular duplex code. The anatomic target, not simply the limited scope, distinguishes it from 93979.
93979 billing questions
How does this differ from 93978?
93979 represents a limited examination of the relevant abdominal vessels or graft, while 93978 is the complete-study sibling. Use the code that matches the documented scope of the examination.
Can the professional and technical portions be billed separately?
Yes. Modifier 26 identifies the professional interpretation, and modifier TC identifies the technical service. Without either modifier, the claim represents the global service.
When does the multiple procedure reduction affect this code?
CMS applies the cardiovascular diagnostic multiple procedure reduction to the technical component. It does not apply to the professional component under the rule provided for this code.
How is this different from 93975 or 93976?
Those codes describe duplex evaluation of visceral organ vascular flow. Choose 93979 for a limited assessment of the aorta, IVC, iliac vasculature, or a related bypass graft.
What should the report document?
Document the clinical reason for the study, the specific vessel or graft examined, the limited scope of the evaluation, and the duplex findings.
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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