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Would this be 50436 or 50688/75984? Or unlisted or a combination of one or more?

"Contrast was injected through the right nephrostomy tube, performing a nephrostogram. This demonstrates satisfactory positioning and functioning of the indwelling nephrostomy tube. Contrast does traverse the distal ureter into the ileal conduit. The nephrostomy tube was removed over a guidewire and a 6 French sheath was placed. A second guidewire was advanced down the ureter and into the ileal conduit. Dr. from urology then used one of the wires as an access site to perform an antegrade ureteroscopy. After the antegrade ureteroscopy was performed one of the Glidewire was removed. Over the other Glidewire, an 8 French nephrostomy tube was replaced."