CPT® Code 45121

Proctectomy, complete (for congenital megacolon), abdominal and perineal approach; with subtotal or total colectomy, with multiple biopsies

The CPT® Code 45121 refers to a complete proctectomy performed through both abdominal and perineal approaches, specifically indicated for congenital megacolon, which is also known as Hirschsprung's disease. This condition is characterized by the absence of ganglion cells, a specialized type of nerve cell, in the rectum and varying lengths of the colon. The absence of these cells results from a failure during fetal development, where the ganglion cells do not migrate along the bowel, leading to abnormal intestinal function. Patients with congenital megacolon may experience symptoms ranging from complete bowel obstruction to severe constipation, necessitating surgical intervention. The procedure involves the removal of the affected bowel segments and the replacement of these segments with healthy bowel that contains normal nerve cells. This is achieved by pulling down a segment of normal bowel and connecting it to the anal mucosa. The operation may also be referred to as a Swenson, Duhamel, or Soave operation, depending on the specific surgical technique employed. In this procedure, multiple biopsies of the bowel are obtained to identify the location of normal nerve tissue before the resection of the rectum and part or all of the colon is performed. This comprehensive approach ensures that the abnormal bowel is effectively removed while preserving as much functional bowel as possible.