Urology Coding Alert

Question: My physician performed a cysto with left stone manipulation, and after that an ESWL for the same stone. The bundling guidelines tell me that the 52330 is bundled into the 50590 but can be unbundled with a modifier. Here is my dilemma: On one hand, the urologist is treating the same stone and I should not bill for both. On the other hand, these are two different procedures with basically two different ways of entry into the body. Would that be enough to bill both codes with 52330-59? Montana Subscriber Answer: You are on the right coding path. First, report 50590 (Lithotripsy, extracorporeal shock wave) for the extracorporeal shock wave lithotripsy (ESWL). You'll report 592.0 (Calculus of kidney) as the diagnosis. This represents a renal pelvic stone, which your urologist most likely manipulated from the ureter into the renal pelvis. Next, report 52330 (Cystourethroscopy [including ureteral catheterization]; with manipulation, [...]