How Often Should You Get a Colonoscopy Test?


Quick Answer

Individuals with an average risk for colon cancer should have their first colonoscopy at age 50 and every 10 years thereafter, reports the American Cancer Society. Those with a family history of colon cancer should undergo colonoscopy at age 40 and every five years after the initial procedure.

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Full Answer

If colon polyps were found on a previous colonoscopy, the size of the polyp determines the interval between procedures, notes the American Cancer Society. Adenomas less than 1 centimeter in size warrant a repeat colonoscopy five to 10 years after diagnosis, while adenomas larger than 1 centimeter require a repeat procedure within three years.

Conditions that warrant a colonoscopy before the age of 50 include ulcerative colitis and Crohn's disease, according to WebMD. Individuals with a family history of colon cancer or colon polyps before the age of 60 and those with a history of familial adenomatous polyposis should also undergo a colonoscopy before the age of 50.

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