CPT code 50040 represents a surgical urinary diversion in which the kidney is incised and an opening is created from the renal collecting system to the exterior of the abdomen to relieve urinary obstruction. The procedure is clinically important when obstructions—such as malignancy, large kidney stones, or infected collecting systems—threaten renal function or cause sepsis. Nationally, this code is relevant to hospitals, surgical practices, and payers managing complex urologic and oncologic presentations.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical indications and typical settings for the service, guidance on common billing modifiers supplied in the input, and what to expect in payer coverage discussions. The publication outlines benchmarking and coding context where available and highlights policy or coverage considerations that commonly affect claims for major urinary diversion procedures. Clinical context emphasizes that the service is a definitive decompressive intervention performed in operative or interventional suites and is used to manage obstructive uropathy from diverse causes.