CPT code 75831: Renal venography, unilateral study2026 Medicare rate & RVUs

Medicare pays $118.91 for 75831 nationally in the office. Local office rates run $106.10–$155.83.

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

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

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 of 109 payment localities

75831 rates by state

Office rate range in each state. Select a state to see its payment localities.

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.

Payment rules and modifiers for 75831

The CMS indicators that decide how 75831 is paid alongside other services.

What modifiers do to the payment

When to use modifier 26

75831 compared with similar codes

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.

Codes related to 75831

Related codes aren’t interchangeable: bill the code that matches the service performed.

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

Open CMS sourceHow we calculate rates