Oklahoma Subscriber
Answer: The colon procedure code depends on the surgeon's technique. The most likely choices are 45380 (Colonoscopy, flexible, proximal to splenic flexure; with biopsy, single or multiple) if the surgeon uses biopsy forceps or 45385 (... with removal of tumor[s], polyp[s], or other lesion[s] by snare technique) if he uses a snare.
Both 45380 and 45385 cross to anesthesia code 00810 (Anesthesia for lower intestinal endoscopic procedures, endoscope introduced distal to duodenum).