Computed tomography colonography (CTC) may be considered medically necessary for the purposes of colon cancer screening.
Computed tomography colonography may be considered medically necessary in individuals for whom a conventional colonoscopy is indicated but who are unable to undergo conventional colonoscopy for medical reasons (see Policy Guidelines section); CTC may also be considered medically necessary for individuals with an incomplete conventional colonoscopy because of colonic stenosis or obstruction.
Except for the indications outlined in the policy statements above, CTC is considered investigational.
