Ontario lowers colorectal cancer screening age to 45
Rule ChangesOntario is the second Canadian province to open at-home colon cancer testing to residents in their late 40s.
July 1st, 2026: Ontario lowers screening age to 45New here? Follow stories to track developments over time. Create a free account to get updates when stories you care about change.
Overview
Starting July 1, 2026, an Ontarian who turns 45 can order a colon cancer test and do it at home. Until now, they had to wait until 50.
The change opens routine screening to hundreds of thousands more people. Colorectal cancer is rising among adults under 50, and catching it early can mean a minor procedure instead of chemotherapy.
Why it matters
Screening five years earlier means more Ontarians catch colorectal cancer while it is still curable, instead of after it spreads.
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People Involved
Organizations Involved
The provincial agency that runs ColonCancerCheck, Ontario's organized colorectal screening program.
A national advocacy group pressing every province to start screening at 45.
The national cancer charity lobbying provinces to screen at 45.
Timeline
May 2021 July 2026
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Ontario lowers screening age to 45
Latest PolicyOntario opens the at-home FIT test to residents aged 45 to 49. Doctors can order it immediately; invitation letters go out in phases.
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Prince Edward Island goes first
PolicyP.E.I. becomes the first Canadian province to lower its routine screening age from 50 to 45. Residents 45 to 49 can request mailed stool tests.
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U.S. task force lowers its recommended age to 45
GuidelineThe U.S. Preventive Services Task Force recommends starting colorectal cancer screening at 45, citing rising cases in younger adults.
Historical Context
3 moments from history that rhyme with this story — and how they unfolded.
U.S. lowers colorectal screening age to 45 (2021)
The U.S. Preventive Services Task Force cut its recommended screening age from 50 to 45. It cited a steady rise in colorectal cancer among adults in their 40s. The American Cancer Society had already made the same call in 2018.
Insurers were required to cover screening at 45, and testing among people in their late 40s climbed.
The 45 threshold became the North American benchmark that Canadian provinces are now adopting one by one.
Ontario's change follows the same evidence and lands on the same age the U.S. adopted five years earlier.
Chadwick Boseman's death (2020)
The actor Chadwick Boseman died of colon cancer at 43. He had been diagnosed at 39 and kept it private while continuing to work. His death drew wide attention to cancer striking people far below the old screening age.
Searches for colon cancer symptoms and screening spiked in the weeks after his death.
His case became a reference point in the push to screen younger adults.
It put a recognizable name on the trend Ontario is responding to: colorectal cancer in people under 50.
The 'Couric effect' (2000)
Journalist Katie Couric had a colonoscopy broadcast on national television after losing her husband to colon cancer at 42. She wanted to strip the stigma from the procedure. Millions watched.
Colonoscopy rates jumped in the months that followed, an effect researchers later measured and named after her.
It showed that public awareness, not just policy, drives whether people actually get screened.
Ontario's lower age only helps if people act on it; the Couric case shows uptake depends on awareness as much as eligibility.
