$175.31
93970 describes a complete bilateral venous examination of the arms or legs. 93971 describes a unilateral or limited examination.
On this page
CMS RVU26D · Effective 2026-10-01
93971 Venous duplex scan Medicare reimbursement rates in Wisconsin
Duplex ultrasound evaluates veins in one arm or leg, or performs a limited extremity venous examination, often when deep vein thrombosis is suspected. Compare 93971 office and facility rates across CMS payment localities in Wisconsin.
Amounts below use the non-QP conversion factor for participating physicians. These are base physician payments before claim-level adjustments, not patient costs or total hospital charges.
What does Medicare pay for 93971 in Wisconsin?
Wisconsin has 1 payment locality in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the payment area shown below, using the same CMS release.
Office / nonfacility
$110.88
1 of 1 localities have a supported rate.
Payment area: Wisconsin
One mapped payment locality.
Facility setting
No supported rate
These are locality ranges, not averages or address-specific quotes. A facility-setting amount covers the physician service; it does not include a hospital’s separate bill. Choose a locality below to inspect its calculation, compare other payment areas, or price a percentage of Medicare.
Noninvasive vascular study
About 93971: Limited or unilateral extremity venous duplex scan
Duplex ultrasound evaluates veins in one arm or leg, or performs a limited extremity venous examination, often when deep vein thrombosis is suspected.
Extremity venous duplex combines grayscale imaging and Doppler flow assessment with vein compression and other maneuvers to assess venous patency and flow. A painful, swollen leg or arm with suspected deep vein thrombosis is a common reason for the examination; assessment of known thrombosis or venous reflux may also prompt it. Vascular sonographers obtain images in office vascular labs, emergency departments, and hospital imaging departments. A radiologist, vascular surgeon, or other qualified physician interprets the findings.
Report 93971 for a unilateral extremity venous duplex or a limited study, including a focused bilateral examination; a complete bilateral arm or leg venous examination is 93970. Record which limb and veins were examined, compression and Doppler findings, and any technical limits that prevented full evaluation. When components are billed separately, use modifier 26 for physician interpretation and modifier TC for equipment and staff; bill the global service without a component modifier when both are furnished and billed together. For multiple eligible cardiovascular diagnostic tests performed for the same patient on the same date, Medicare's multiple procedure reduction affects the technical component.
CMS billing rules for 93971
- Professional and technical components
- Diagnostic test with a professional component (modifier 26, interpretation) and a technical component (modifier TC, equipment and staff); billing without a modifier is the global service.
- Multiple procedures
- Cardiovascular diagnostic multiple procedure reduction applies to the technical component.
Where the value comes from
- Work RVU0.44 · 13%
- Practice expense (office) RVU2.99 · 86%
- Malpractice RVU0.05 · 1%
1.5M
Medicare services in 2024 · #105 by national volume
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.
93971 compared with similar codes
Office rates for Wisconsin, from the same CMS release.
93926
No office rateLower extremity study
93926 evaluates lower extremity arteries with a unilateral or limited duplex study. 93971 evaluates extremity veins, often when thrombosis is suspected.
$115.00
93931 is a unilateral or limited arterial duplex of the arm. A venous duplex of an arm to evaluate a suspected line-associated clot is 93971.
Compare 93971 by payment locality
Find the payment area for your service address, then open its rate page for calculation inputs, release history and the percentage-of-Medicare tool. A city may cross payment-area boundaries; the ZIP lookup above helps resolve the location.
1 of 1 payment localities
Wisconsin →
Office / nonfacility
$110.88
Facility
Unavailable
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How this local rate is calculated
Each RVU component is multiplied by its own geographic practice cost index (GPCI). The three adjusted components are added, then multiplied by the conversion factor. These are the inputs used for 93971 in Wisconsin.
PPRRVU2026_Oct_nonQPP.csv
12,329
- Code
- 93971
- Physician work
- 0.44
- Practice expense
- 2.99
- Malpractice
- 0.05
GPCI2026.csv
111
- Locality
- Wisconsin
- Physician work
- 1.000
- Practice expense
- 0.958
- Malpractice
- 0.308
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 0.44 | × 1.000 | 0.4400 |
| Practice expense | 2.99 | × 0.958 | 2.8644 |
| Malpractice | 0.05 | × 0.308 | 0.0154 |
| Total RVUs | 3.3198 | ||
| Conversion factor | × 33.4009 | ||
Office / nonfacility rate, Wisconsin$110.88
Explore RVUs, geographic factors and the full formula
Office / nonfacility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 0.44 | 1 |
| Practice expense | 2.99 | 0.958 |
| Malpractice | 0.05 | 0.308 |
(0.44 × 1 + 2.99 × 0.958 + 0.05 × 0.308) × $33.4009 = $110.88
The office and facility calculations use their respective practice-expense RVUs. The facility amount here is the physician fee, not a separate hospital or facility bill.
93971 billing questions
When should 93970 be reported instead of 93971?
Use 93970 when a complete duplex evaluation of the veins of both arms or both legs is performed and documented. Report a unilateral or limited bilateral examination with 93971.
Can 93971 be used for arterial duplex of a leg?
No. 93971 describes an extremity venous duplex examination. Lower extremity arterial duplex examinations are reported with 93925 or 93926; upper extremity arterial duplex examinations are reported with 93930 or 93931.
How are the technical and interpretation components reported separately?
When billing split components, the provider billing for equipment and staff uses modifier TC, while the interpreting physician uses modifier 26 and documents the interpretation in a signed report. An entity billing for both components reports the global service without a component modifier.
Does a multiple procedure reduction affect this study?
When multiple eligible cardiovascular diagnostic tests are performed for the same patient on the same date, Medicare's cardiovascular diagnostic multiple procedure reduction affects the technical component of eligible services.
What documentation supports a limited study?
The report should identify the extremity and veins examined, document compression and Doppler findings, and state the clinical reason for the exam, such as leg swelling or suspected deep vein thrombosis. Document why any intended segment could not be evaluated.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense, and malpractice RVUs, adjusted by each locality’s geographic indices and the applicable conversion factor. Unavailable or separately priced services are labeled rather than assigned a made-up amount.
Source: RVU26D. Effective 2026-10-01 through the day before 2027-01-01.
12,32693970,,Extremity study,A,,0.68,4.74,,4.74,NA,0.09,5.51,5.51,1,XXX,0.00,0.00,0.00,6,2,0,0,0,9,,33.4009,09,0,99,7.47,7.47,0.11
12,32793970,26,Extremity study,A,,0.68,0.22,,0.22,,0.06,0.96,0.96,1,XXX,0.00,0.00,0.00,6,2,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
12,32893970,TC,Extremity study,A,,0.00,4.52,,4.52,NA,0.03,4.55,4.55,1,XXX,0.00,0.00,0.00,6,2,0,0,0,9,,33.4009,01,0,99,7.25,7.25,0.05
12,32993971,,Extremity study,A,,0.44,2.99,,2.99,NA,0.05,3.48,3.48,1,XXX,0.00,0.00,0.00,6,0,0,0,0,9,,33.4009,09,0,99,3.32,3.32,0.05
12,33093971,26,Extremity study,A,,0.44,0.14,,0.14,,0.03,0.61,0.61,1,XXX,0.00,0.00,0.00,6,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
12,33193971,TC,Extremity study,A,,0.00,2.85,,2.85,NA,0.02,2.87,2.87,1,XXX,0.00,0.00,0.00,6,0,0,0,0,9,,33.4009,01,0,99,3.18,3.18,0.02
12,33293975,,Vascular study,A,,1.13,6.50,,6.50,NA,0.13,7.76,7.76,1,XXX,0.00,0.00,0.00,6,0,0,0,0,9,,33.4009,09,0,99,7.62,7.62,0.14
10802402,WA,02,SEATTLE (KING CNTY),1.050,1.227,0.817
10902402,WA,99,REST OF WASHINGTON,1.013,1.053,0.761
11011402,WV,16,WEST VIRGINIA,1.000,0.869,1.431
11106302,WI,00,WISCONSIN,1.000,0.958,0.308
11203602,WY,21,WYOMING**,1.000,1.000,0.740
113"MAC Assignments as of November 22, 2023",,,,,,
114,,,,,,