Surgical Procedure of Primary Site: Rectosigmoid
Code 30: Wedge or segmental resection, partial proctosigmoidectomy
Code 31: Partial proctosigmoidectomy plus resection of contiguous organs
Code 40: Pull through with sphincter preservation
Code 50: Total proctectomy
Code 30 for rectosigmoid includes those procedures that excise the tumor and some of the surrounding normal tissues without resecting the entire rectosigmoid including wedge or segmental resection and partial proctosigmoidectomy. Procedures assigned code 30 for rectosigmoid cancer include anterior resection, Hartmann’s procedure, and low anterior resection. If a segmental resection or partial proctosigmoidectomy is performed and contiguous organs such as the small bowel or bladder are also resected as part of the same procedure, assign code 31. Assign code 40 when the procedure performed for cancer of the rectosigmoid is described as pull through with sphincter preservation. This includes coloanal anastamosis. Code 50 is assigned for total proctectomy, removal of the entire rectum.