Medicare covers one colonoscopy every 10 years if you have no symptoms or risk factors

If you are 50 or older and have never had a colonoscopy, or your last one was more than 10 years ago, Medicare Part B pays for the full procedure with no copay, coinsurance, or deductible. This is considered a preventive screening. The 10-year window resets after each screening colonoscopy — so if you had one in 2014, your next covered screening is in 2024.

The coverage applies only to screening colonoscopies, which means the procedure is done because of your age and risk level, not because you have symptoms like bleeding, pain, or changes in bowel habits. If your doctor finds and removes polyps during the screening, Medicare still covers the full cost of that visit. If the colonoscopy becomes a treatment procedure — for example, because your doctor needs to remove a large polyp or take a biopsy — the rules change, and you may owe a copay.

Key Takeaways

  • Medicare covers one screening colonoscopy every 10 years at no cost to you if you have no symptoms or high-risk factors.
  • If you are between 40 and 49 and have a family history of colorectal cancer, Medicare may cover screening colonoscopies every 10 years starting at age 40.
  • If your colonoscopy finds polyps or abnormalities that require removal or biopsy, the procedure may shift from screening to treatment, and you could owe a copay.
  • If you have symptoms like rectal bleeding or a change in bowel habits, the colonoscopy is diagnostic, not preventive, and standard copay rules explore.
  • Your doctor's office should verify your coverage before the procedure to confirm whether Medicare will pay the full cost.

When Medicare covers screening colonoscopies at no cost

Medicare Part B covers a screening colonoscopy with zero out-of-pocket cost if all of these are true: you are 50 or older, you have no symptoms of colorectal disease, and your last screening colonoscopy was more than 10 years ago (or you have never had one). The procedure must be done by a doctor or may have access to practitioner who accepts Medicare.

The no-cost coverage includes the colonoscopy itself, the anesthesia, and the removal of small polyps found during the exam. You do not pay a deductible, and there is no copay or coinsurance. This is one of the few preventive services Medicare covers in full.

Screening colonoscopies before age 50 with family history

If you are between 40 and 49 and have a family history of colorectal cancer, Medicare may cover a screening colonoscopy every 10 years starting at age 40. Family history means a parent, sibling, or child diagnosed with colorectal cancer. You will need your doctor to document this family history in your medical record before the procedure.

Coverage for early screening is not automatic — your doctor must order it based on your personal risk, and Medicare must determine it is medically necessary. Call Medicare at 1-800-MEDICARE to confirm coverage before scheduling if you are under 50.

When you owe a copay instead of zero cost

If your colonoscopy is not a routine screening, you will owe a copay. This happens when your doctor performs the procedure because you have symptoms — such as rectal bleeding, abdominal pain, or a change in bowel habits — rather than for routine prevention. In this case, the colonoscopy is considered diagnostic, and you pay the standard 20% coinsurance after you meet your Part B deductible.

Even during a screening colonoscopy, if your doctor removes a large polyp, takes a biopsy, or performs other treatment, that portion of the visit may be billed as a treatment procedure. Your doctor's office should tell you before the procedure if they expect to do anything beyond straightforward screening. Ask whether the full cost will be covered or whether you might owe a copay for the treatment part.

How the 10-year window works

The 10-year coverage period starts from the date of your last screening colonoscopy, not from when you turned 50. If you had a screening colonoscopy on January 15, 2014, your next covered screening is January 15, 2024. If you have the procedure before that date, Medicare will not cover it as a screening, and you will owe a copay.

If you had a colonoscopy for a symptom or treatment reason — not a routine screening — that procedure does not reset your 10-year clock. Only screening colonoscopies count toward the 10-year interval. If you are unsure whether your last colonoscopy was a screening or a diagnostic procedure, ask your doctor's office for a copy of the report. The report will state the reason for the procedure.

What to do before your colonoscopy appointment

Contact your doctor's office or the facility where you will have the procedure and ask them to verify your Medicare coverage before your appointment. They can check whether Medicare will pay the full cost or whether you will owe a copay. Bring your Medicare card and any other insurance cards you have.

If you have a Medigap or Medicare Advantage plan in addition to Original Medicare, your supplemental coverage may affect your out-of-pocket cost. Some Medigap plans cover the copay you would normally owe for diagnostic procedures. Your doctor's office can check this as well, but you may need to provide your supplemental plan information.

What happens if you need a colonoscopy sooner than 10 years

If you develop symptoms between screenings — such as rectal bleeding, persistent diarrhea, or abdominal pain — your doctor can order a colonoscopy at any time. This procedure will be covered under the diagnostic rules, not the screening rules. You will owe a copay (20% coinsurance after your deductible) because the procedure is being done to investigate a symptom, not for routine prevention.

If your previous screening found precancerous polyps that need follow-up, your doctor may recommend a colonoscopy sooner than 10 years. Medicare will cover this follow-up colonoscopy as a screening procedure with no copay, because it is part of the management of findings from your last screening. Your doctor's office should document this in your medical record so there is no billing confusion.

Frequently Asked Questions

Does Medicare cover colonoscopy if I have never had one and I am over 50?

Yes. If you are 50 or older and have never had a screening colonoscopy, Medicare covers one at no cost. You do not need to wait for a specific age or meet any other condition beyond being 50 and having no symptoms. Schedule it with a Medicare-accepting provider.

What if my last colonoscopy was 9 years ago — can I have another one covered?

No. Medicare covers screening colonoscopies every 10 years, measured from the date of your last screening. If your last one was 9 years ago, the next covered screening is in one year. If you have it before then, you will owe a copay.

If my doctor finds and removes a polyp during screening, do I still pay nothing?

Yes. Removal of small polyps during a screening colonoscopy is included in the no-cost coverage. If your doctor removes a large polyp or performs a biopsy, ask the office whether the entire visit will be covered as screening or whether part of it will be billed as treatment.

I have Medicare Advantage — does it cover colonoscopy the same way?

Medicare Advantage plans must cover preventive colonoscopies at no cost, just like Original Medicare. However, your plan may have different rules about which providers you can use. Check your plan documents or call your plan to confirm coverage before scheduling.

Can I get a colonoscopy covered if I have symptoms like bleeding?

Yes, but it will be treated as a diagnostic procedure, not a screening. You will owe a 20% copay after you meet your Part B deductible. This is true even if you are due for a routine screening — a symptomatic colonoscopy does not count as your 10-year screening.