CPT code 50435 represents an image-guided percutaneous exchange of a nephrostomy catheter, including optional nephrostogram and ureterogram with radiological supervision and interpretation. This procedure is clinically important for restoring or maintaining urinary drainage when the renal pelvis or ureter is obstructed, and it is commonly performed in interventional radiology settings. Nationally, the code is relevant for hospital outpatient departments, ambulatory surgical centers, and interventional suites where image-guided urinary drainage procedures occur.

Key payers covered in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find concise benchmarks for clinical and billing practice, context on the clinical indications and typical settings, and a summary of common billing modifiers and coding considerations. The publication outlines expected service lines and payer coverage patterns, highlights documentation elements tied to the procedure description, and summarizes typical sites of service and the nature of imaging guidance used.

The content provides practical, nationally focused context for coding, billing, and administrative staff, as well as clinicians who refer or perform image-guided nephrostomy catheter exchanges. Data not available in the input are noted where applicable.