© Copyright 2026 American Medical Association. All rights reserved.
A flexible sigmoidoscopy is a diagnostic and therapeutic procedure that involves the examination of the sigmoid colon using a flexible endoscope. This procedure is specifically designed for the ablation of tumors, polyps, or other lesions that cannot be removed using traditional methods such as hot biopsy forceps, bipolar cautery, or snare techniques. During the procedure, a standard flexible sigmoidoscope is inserted into the anus and advanced through the rectum into the sigmoid colon. Air insufflation is utilized to expand the colon and separate the mucosal folds, allowing for a clear view of the internal structures. Once the scope is in place, it is withdrawn to inspect the mucosa carefully. If any tumors, polyps, or lesions are identified, they can be treated accordingly. In cases where lesions are amenable to removal, a snare technique may be employed, as described in CPT® Code 45338. However, for lesions that require ablation, CPT® Code 45339 is utilized, which involves the use of alternative techniques such as laser ablation. In this method, a laser device is introduced through the endoscope and directed at the lesion, starting from the proximal margin and moving along the entire lesion to effectively destroy it.
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