This CPT code specifies Proctosigmoidoscopy, rigid and I do not see a different CPT for a flexible proctosigmoidoscopy. In our GI lab, occasionaly the doc will insert the flexible sigmoidoscope only a very short distance- just to the rectum or a small distance past (about 20cm)- and they have been charging and coding a sigmoidoscopy 45330 for this service. This seems like overkill to me. Do you have any suggestions on what should be coded when this is done?