CPT® Code 75831

Venography, specifically renal venography, is a specialized radiological procedure aimed at visualizing the renal veins to assess various vascular conditions. This procedure involves the use of a radiopaque contrast medium, which is a substance that enhances the visibility of internal structures during imaging. The process is conducted under radiological supervision, ensuring that the imaging is performed accurately and safely. The primary purpose of renal venography is to diagnose a range of conditions that may affect the renal veins, including blood clots, tumors, retroperitoneal fibrosis, renal agenesis, venous anomalies, and renovascular hypertension. The procedure typically begins with the access of the femoral vein, which is usually approached through the right or left groin using a large bore needle. Following this, a guidewire is inserted through the needle and advanced into the vena cava, leading to the renal veins. A catheter is then placed over the guidewire to the targeted area, allowing for the injection of the contrast medium. As the contrast flows through the renal veins, X-ray images are captured to visualize the anatomy and any potential abnormalities. The procedure concludes with the removal of the catheter, and the findings are documented in a written report, which includes the review and interpretation of the images obtained. This code specifically reports the unilateral selective renal venography procedure, distinguishing it from bilateral procedures, which are coded differently.