CPT® Code 50553

Renal endoscopy through established nephrostomy or pyelostomy, with or without irrigation, instillation, or ureteropyelography, exclusive of radiologic service; with ureteral catheterization, with or without dilation of ureter

The procedure described by CPT® Code 50553 involves renal endoscopy performed through an already established nephrostomy or pyelostomy. This procedure is utilized to examine the kidney and ureter for any abnormalities, such as obstructions or stenosis. The process begins with the removal of the external drainage bag from the nephrostomy or pyelostomy tube, allowing access to the internal structures. A guidewire is then advanced through the tube, facilitating the removal of the nephrostomy tube itself. Following this, a series of dilators are utilized to expand the tract, enabling the insertion of a renal endoscope. This endoscope allows for a direct visual examination of the kidney. During the procedure, sterile saline or other solutions may be used for irrigation, and diagnostic or therapeutic solutions can be instilled into the kidney. Additionally, contrast material may be used for ureteropyelography, although this specific service is excluded from the CPT® Code 50553 description. A key component of this procedure is ureteral catheterization, which involves advancing a ureteral catheter through the endoscope into the ureter for further examination. If any stenosis is detected, a balloon-tipped catheter can be introduced to the affected area and inflated to dilate the stenotic region. The procedure concludes with the removal of all instruments, replacement of the nephrostomy tube, and reattachment of the external drainage bag, ensuring that the patient’s drainage system is restored and functioning properly.