Modifier -33 (preventive service) is attached to the CPT code to notify to commercial insurance companies that the colonoscopy started as a screening, but ended up diagnostic. Modifier -33 is new for ...

This code has been deleted. The new code for unlisted colon procedure is 45399. • CPT code 45378. Colonoscopy is examination of the entire colon. • CPT code 45379. “Foreign body(s)” replaces “foreign ...