Dr. Elizabeth Squirell · Gastroenterologist · Kingston Health Sciences Centre
Colon cancer screening in Ontario
Ontario now offers colon cancer screening from age 45. Find out which test is right for you, how to get it, and what an abnormal result means.
Key points
- Since July 1, 2026, Ontario offers screening from age 45 for people at average risk. It used to start at 50.
- At average risk, do the FIT stool test every 2 years from age 45 to 74.
- To get a FIT kit, ask your family doctor or nurse practitioner. No family doctor? Call 811 (TTY 711) or visit Health811 online.
- If your FIT is abnormal, you need a colonoscopy, ideally within 8 weeks. Don't repeat the FIT.
- If a parent, brother, sister or child had colon cancer before age 60, or two or more had it at any age, you need a colonoscopy every 5 years. Start at 40, or 10 years before the youngest relative was diagnosed, whichever comes first.
- If you have Crohn's or colitis, polyps that need follow-up, or a gene condition such as Lynch syndrome, follow your specialist's plan instead.
- Blood in your stool, a lasting change in bowel habits, weight loss or low iron? See your doctor now, at any age. Don't wait for screening.
Go to emergency or call 911 if you have
- Heavy bleeding from your bottom, or you feel faint or dizzy
- Severe belly pain that does not settle
- Your belly is swollen, you are vomiting, and you can't pass gas or stool