Question: North Carolina Subscriber Answer: You should also bill 52204 (Cystourethroscopy, with biopsy[s]) and 52005 (Cystourethroscopy, with ureteral catheterization, with or without irrigation, instillation, or ureteropyelography, exclusive of radiologic service) with modifier 59 (Distinct procedural service) if the cystoscopy and retrograde represents a diagnostic procedure. If your urologist also interpreted the retrograde pyelogram and separately documented the reading in the medical records, you may also report 74420-26 (Urography, retrograde, with or without KUB; professional component).