Medicare covers the colonoscopy itself at no cost to you, and it also covers the removal of polyps found during the procedure — both are considered preventive care under Medicare Part B

When your doctor removes a polyp during a colonoscopy, Medicare treats the whole visit as one preventive service. You pay nothing for the colonoscopy screening itself, and you pay nothing for polyp removal if it happens during that same procedure. This is true whether the polyp is small or large, and whether one polyp or multiple polyps are removed.

The key word is "during." If polyps are found and removed in the same visit, there is no separate charge. If your doctor finds polyps but decides to remove them in a second, separate procedure later, that second procedure may have different cost rules — though many doctors remove polyps when ready to avoid a second appointment.

Key Takeaways

  • Medicare Part B covers colonoscopy screening and polyp removal at no cost when both happen in the same visit.
  • You pay nothing out of pocket for the procedure itself, though you may owe a copay for the anesthesia used during the colonoscopy.
  • If your doctor removes tissue for a biopsy (testing) rather than just removing a polyp, the biopsy itself is covered, but you may see a separate charge for the pathology lab work.
  • Medicare covers colonoscopies every 10 years for average-risk adults, or more often if polyps or other findings require it.

What Medicare actually pays for during a colonoscopy with polyp removal

Medicare Part B pays for the colonoscopy procedure code, which includes the doctor's time, the use of the facility, and the removal of polyps found during the exam. The procedure code is the same whether polyps are found or not. If polyps are removed, the removal is bundled into that single code — there is no separate charge added to your bill.

Anesthesia is handled differently. If your doctor uses sedation or anesthesia during the colonoscopy (which is standard), an anesthesiologist or nurse anesthetist may bill separately for that service. Medicare Part B covers anesthesia, but you typically owe a 20 percent copay on the anesthesia charge after you meet your Part B deductible for the year.

Biopsies work this way: if your doctor takes a tissue sample to test it (not just removes a polyp), the biopsy removal is covered under the colonoscopy code. However, the pathology lab that examines the tissue may bill separately, and you may owe a copay on that lab work.

Your out-of-pocket costs for colonoscopy with polyp removal

If you have not yet met your Part B deductible for the year, you pay the full deductible amount before Medicare begins to pay. Once the deductible is met, you owe nothing for the colonoscopy and polyp removal themselves.

You may owe a copay for anesthesia — typically 20 percent of the Medicare-approved amount — after your deductible is met. The exact amount depends on what the anesthesia provider charges and what Medicare approves in your area.

If the facility where you have the colonoscopy is out of network with Medicare, you could owe more. Most hospitals and outpatient surgery centers are in network, but it is worth confirming before your appointment. Call the facility directly and ask whether they accept Medicare assignment for colonoscopies.

When Medicare covers colonoscopy more often than every 10 years

Medicare covers a screening colonoscopy every 10 years for adults at average risk with no history of polyps or colon cancer. If your previous colonoscopy found polyps, your doctor may recommend a follow-up colonoscopy sooner — often in 3, 5, or 7 years depending on what was found. Medicare covers these earlier follow-up colonoscopies at no cost.

If you have a family history of colon cancer, a personal history of inflammatory bowel disease, or other risk factors, your doctor may recommend more frequent screening. Medicare covers these as well, as long as your doctor documents the medical reason.

If your colonoscopy is coded as diagnostic rather than preventive — meaning your doctor performed it because you had symptoms like bleeding or abdominal pain — the coverage rules are different. In that case, you may owe a copay or coinsurance. Make sure your doctor codes the visit correctly so you receive preventive coverage.

What happens if polyps are found but not removed during your colonoscopy

Sometimes a doctor finds a polyp that is too large, too difficult to remove safely, or in a location that requires a specialist. In that case, the polyp is not removed during the screening colonoscopy. You still pay nothing for the screening itself.

If a second procedure is scheduled to remove the polyp, that second procedure is typically coded as therapeutic (treatment) rather than preventive. You may owe a copay or coinsurance on the second procedure, depending on your plan. However, many gastroenterologists will remove the polyp during the same visit if at all possible to avoid this situation.

Ask your doctor before the procedure whether they plan to remove any polyps found, or whether removal might require a separate visit. This helps you understand what to expect for costs.

How to confirm coverage before your colonoscopy appointment

Call Medicare directly at 1-800-MEDICARE (1-800-633-4227) and tell them you are scheduled for a colonoscopy screening. They can confirm whether you have met your Part B deductible for the year and what your copay for anesthesia will be.

You can also contact your gastroenterologist's office and ask them to verify coverage with Medicare on your behalf. Most offices do this routinely. Provide them with your Medicare card number and the date of your appointment.

If you have a Medigap or Medicare Advantage plan in addition to Original Medicare, contact that plan as well. Some Medigap plans cover the Part B copay for anesthesia, and Medicare Advantage plans may have different rules about which facilities are in network.

What to do if you receive a bill after your colonoscopy

If you receive a bill for the colonoscopy itself or for polyp removal, do not ignore it. Call the facility's billing department and ask why you were billed. Remind them that colonoscopy screening and polyp removal are covered at no cost under Medicare Part B.

If the facility insists the charge is correct, ask for an itemized bill showing what each charge is for. If you believe the bill is wrong, you can file an appeal with Medicare. Call 1-800-MEDICARE and ask how to dispute the charge.

Keep copies of your Medicare Summary Notice (the statement Medicare sends you after each service). This document shows what Medicare paid and what you owe. If there is a discrepancy between what the facility billed you and what Medicare paid, the notice will show it.

Frequently Asked Questions

Do I have to pay anything if my doctor removes multiple polyps?

No. Whether your doctor removes one polyp or ten polyps during the same colonoscopy, the procedure is covered at no cost. The removal of multiple polyps is included in the single procedure code.

What if the pathology lab says my polyp was cancerous?

The removal of the polyp and the pathology testing are both covered by Medicare. You may owe a copay on the pathology lab work (typically 20 percent after your deductible), but the fact that cancer was found does not change your coverage for the colonoscopy or removal.

Will I have to pay if my colonoscopy is done at a hospital instead of an outpatient surgery center?

No. Medicare covers colonoscopy screening and polyp removal at no cost in either setting, as long as the facility accepts Medicare assignment. Hospital facility fees may be higher than outpatient centers, but your out-of-pocket cost remains the same — you owe nothing for the procedure itself, though you may owe a copay for anesthesia.

Can I be charged for the colonoscopy if my doctor finds something other than polyps?

If your doctor finds and removes only polyps, you owe nothing. If your doctor finds and removes something else — such as a growth that is not a polyp — the coding may change and you could owe a copay. Ask your doctor before the procedure what they expect to find and how it will be coded.

What if I have a Medicare Advantage plan instead of Original Medicare?

Medicare Advantage plans must cover colonoscopy screening at no cost, just as Original Medicare does. However, the copay for anesthesia and other details may differ. Contact your Medicare Advantage plan before your appointment to confirm your costs.