CPT® Code 51525

The CPT® Code 51525 refers to a surgical procedure known as cystotomy for the excision of bladder diverticulum, which can occur as a single or multiple diverticula. A bladder diverticulum is characterized by a protrusion of the bladder's mucosal tissue through the detrusor muscle, leading to an abnormal pouch that can extend into the abdominal cavity. This procedure is performed through a midline extraperitoneal abdominal approach, allowing the surgeon to gain access to the bladder by carefully dividing the rectus and transversalis fascia and making an incision through the space of Retzius. Once the anterior bladder wall and vesical neck are identified, the bladder dome is incised to facilitate inspection of the bladder wall, including critical areas such as the trigone, ureteral orifices, and bladder neck. The excision of the diverticulum involves either pulling the diverticulum into the bladder for intravesical excision or addressing any adhesions that may prevent this maneuver. The procedure is completed with the repair of the bladder wall defect, ensuring the integrity of the bladder is restored. This code is specifically designated for cases where the excision of bladder diverticula is performed as a separate procedure, distinguishing it from other bladder surgeries that may involve different techniques or indications.