CPT® Code 36251

Selective catheter placement (first-order), main renal artery and any accessory renal artery(s) for renal angiography, including arterial puncture and catheter placement(s), fluoroscopy, contrast injection(s), image postprocessing, permanent recording of images, and radiological supervision and interpretation, including pressure gradient measurements when performed, and flush aortogram when performed; unilateral

A selective catheter placement in the main renal artery and any accessory renal arteries is a specialized procedure performed for renal angiography. This procedure involves the introduction of a catheter into the renal arteries to visualize the blood vessels supplying the kidneys. The process begins with the insertion of a catheter into an extremity artery, typically the femoral artery located in the groin area. A small incision is made at the insertion site to facilitate access. An introducer sheath is then placed into the artery, followed by the insertion of a guidewire. If the right femoral artery is selected, the guidewire is carefully navigated through the femoral and iliac arteries, advancing into the aorta under fluoroscopic guidance, which allows real-time imaging of the procedure. Once the guidewire is positioned correctly, a catheter is advanced over it into the aorta. The guidewire is then maneuvered into the main renal artery and any accessory renal arteries, allowing the physician to position the catheter precisely at the desired location for optimal imaging. After the guidewire is removed, the physician may inject radiopaque contrast media to enhance the visibility of the renal arteries during imaging. Additionally, pressure gradient measurements can be taken to assess any narrowing in the renal arteries that may be impacting blood flow to the kidneys. The entire procedure is documented through the acquisition of images, which are processed and permanently recorded. The physician subsequently reviews these images and recordings, providing a comprehensive written report of the findings. This procedure is coded as 36251 for a selective unilateral renal angiogram, while a selective bilateral study is coded as 36252.