HCPCS 45378

Colonoscopy, flexible; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)

AI EXPLANATION: A colonoscopy is an outpatient medical examination of the large intestine (colon) and rectum. A doctor guides a thin, flexible tube equipped with a light and camera through the colon to check the lining for abnormalities, inflammation, bleeding, or small growths called polyps. The exam may be performed as a preventive checkup or as a diagnostic test to evaluate digestive symptoms. During the procedure, the physician may also gently collect cell or fluid samples using specialized brushing or washing techniques so they can be analyzed in a laboratory.