CPT code 75831: Renal venography, unilateral study2026 Medicare rate & RVUs in Missouri
Report unilateral renal venography for fluoroscopic contrast imaging of one kidney’s venous drainage, such as when evaluating suspected renal vein obstruction or abnormality.
Medicare pays $108.03–$115.16 for 75831 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 75831 covers
This service is fluoroscopic imaging of one side’s renal veins after contrast is introduced into the venous system, commonly through a catheter. A radiologist or interventional radiologist supervises the imaging and interprets the resulting study, often in a hospital or outpatient imaging setting. The examination can document renal venous anatomy and patency when a clinician is investigating a suspected obstruction or other venous abnormality.
Select this code for a unilateral renal-vein study; use the bilateral renal-vein code when both sides are imaged. The report should identify the side examined and support that renal venography was performed, with the images and interpretation documenting the findings. 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. CMS applies the cardiovascular diagnostic multiple procedure reduction 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 75831 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
$108.03 to $115.16
| Payment locality | Office | Facility |
|---|---|---|
| Metropolitan Kansas City, MO | $114.06 | Unavailable |
| Metropolitan St. Louis, MO | $115.16 | Unavailable |
| Rest of Missouri | $108.03 | Unavailable |
How the 75831 rate is calculated
Each of 75831’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 · 75831
RVUs × geographic indexes × conversion factor
Work1.11
1.11 RVUs× 1.000 GPCI
Practice expense2.34
2.34 RVUs× 1.000 GPCI
Malpractice0.11
0.11 RVUs× 1.000 GPCI
Adjusted RVUs
3.5600
Conversion factor
$33.4009
Medicare rate
$118.91
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 75831
The CMS indicators that decide how 75831 is paid alongside other services.
CMS payment indicators · 75831
Renal venography, unilateral 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
75831 without 26 · national office
$118.91
Renal venography, unilateral study
75831-26 · Professional component
$50.10
Pays only the interpretation and report.
75831 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 75833Renal venographyBilateral imaging and interpretation
- This code is for unilateral renal-vein imaging; 75833 is used when both renal sides are imaged.
- 75825Caval venographyInferior vena cava
- 75825 describes venography of the inferior vena cava. Choose 75831 when the imaged venous territory is a single side’s renal veins.
- 75820Extremity venographyOne arm or leg
- 75820 is for venography of one arm or leg. The body site, not the imaging method, distinguishes it from renal venography.
75831 billing questions
When should this code be chosen instead of 75833?
Use 75831 for imaging of one side’s renal veins. Use 75833 when the study images both sides.
Can the professional and technical services be billed separately?
Yes. Modifier 26 reports the professional interpretation, and modifier TC reports the technical service. Billing without either modifier represents the global service.
Does the multiple procedure reduction affect both components?
CMS applies the cardiovascular diagnostic multiple procedure reduction to the technical component.
What documentation supports unilateral reporting?
Document the side examined and include the venographic images and interpretation supporting the renal-vein study.
Is catheter placement included in this code?
This code represents the renal venography imaging service and its supervision and interpretation. Report a separately performed catheter placement service only when supported by the procedure documentation and applicable coding rules.
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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