CPT® Code 50389

A nephrostomy tube, commonly known as a stent or catheter, is a medical device that is inserted through the skin into the renal pelvis or a calyx of the kidney. This tube serves to drain urine directly from the kidney when normal urinary flow is obstructed. The procedure for the removal of a nephrostomy tube, designated by CPT® Code 50389, involves the use of fluoroscopic guidance, which is a type of real-time imaging that allows the physician to visualize the internal structures of the urinary system during the procedure. This is particularly important when there is a concurrent indwelling ureteral stent in place, as it helps to ensure that both the nephrostomy tube and the stent are managed safely and effectively. During the removal process, contrast material may be injected into the nephrostomy tube to enhance the visibility of the kidney, ureter, bladder, and any existing stent on the fluoroscopic images. The procedure requires careful manipulation to avoid damaging any existing stents or sutures, ensuring that the urinary system remains intact and functional after the nephrostomy tube is removed.