You are using an outdated browser. We suggest you update your browser for a better experience. Click here for update.
Close this notification.
Skip to main content Skip to search

Registered Nurse Flexible Sigmoidoscopy

In Ontario, registered nurse flexible sigmoidoscopy can be performed by a physician, or by a specially trained registered nurse under the medical directive of a physician as part of the Registered Nurse Flexible Sigmoidoscopy (RNFS) Program.

Eligibility Criteria

People are eligible for colorectal cancer screening with registered nurse flexible sigmoidoscopy if they meet the criteria below. Referral from a primary care provider is required.

  • Men and women ages 50 to 74
  • Average risk of colorectal cancer:
    • No first-degree relative who has been diagnosed with the disease
    • No personal history of pre-cancerous colorectal polyps requiring surveillance or inflammatory bowel disease (i.e. Crohn’s disease or ulcerative colitis)
  • Asymptomatic
  • Due for colorectal cancer screening:
    • No fecal occult blood test in the past 2 years, flexible sigmoidoscopy in the past 10 years or colonoscopy in the past 10 years

How to Refer Patients

In regions with a registered nurse flexible sigmoidoscopy (RNFS) site, primary care providers have the option of referring eligible people for colorectal cancer screening with this method.

If no RNFS site is available in a region, primary care providers can:

  • refer patients to the closest RNFS site in another region
  • refer patients to an endoscopist for flexible sigmoidoscopy
  • discuss other screening tests with their patients

To refer a patient, request a referral form from one of the sites listed below.



The Ottawa Hospital, Civic Campus

613-798-5555 ext. 10402


Timmins and District Hospital

705-267-2131 ext. 2306