Medicare covers colonoscopy at no cost to you when it is used for screening — that is, when you have no symptoms and your doctor orders it to check for cancer or polyps

Original Medicare (Part A and Part B) pays the full cost of a screening colonoscopy once every 10 years if you are 50 or older, or more often if your doctor finds polyps or you have risk factors. You pay nothing — no copay, no coinsurance, no deductible. If the doctor removes polyps during the procedure, Medicare still covers it at no cost to you. If the colonoscopy is diagnostic — meaning you have symptoms like bleeding or abdominal pain — the same zero-cost coverage applies.

Medicare Advantage plans (Part C) must cover screening colonoscopy with no cost-sharing, just as Original Medicare does. However, the specific doctors and facilities covered, and any rules about where you can have the procedure done, depend on your plan. Check your plan documents or call the plan directly before scheduling.

Key Takeaways

  • Original Medicare covers screening colonoscopy with zero out-of-pocket cost once every 10 years starting at age 50, or more often if polyps are found.
  • If the doctor removes polyps during the procedure, Medicare still covers the entire cost with no additional charges.
  • Colonoscopy ordered because you have symptoms (diagnostic colonoscopy) is also fully covered with no cost to you.
  • Medicare Advantage plans must cover screening colonoscopy at no cost, but you should confirm your plan covers your chosen doctor and facility before scheduling.
  • If you have both Medicare and Medicaid, Medicaid may cover costs that Medicare does not, depending on your state.

When Medicare Covers the Full Cost

Medicare pays 100 percent of the cost for a screening colonoscopy when performed by a doctor who accepts Medicare. The procedure must be done at a facility that is Medicare-approved — this includes hospitals, outpatient surgery centers, and some doctor's offices. Your doctor's office can confirm whether the facility is in-network before you schedule.

The zero-cost coverage includes the colonoscopy itself, the anesthesia (usually sedation), and the removal of polyps if the doctor finds them. It does not matter how many polyps are removed or how complex the removal is — the cost to you remains zero. This is one of the few preventive services Medicare covers completely.

What Happens If Complications Arise During the Procedure

If the doctor discovers something unexpected during the colonoscopy — such as a large polyp, bleeding, or signs of disease — and needs to do additional work beyond a straightforward polyp removal, Medicare covers that additional work at no cost to you. The procedure is still considered screening or diagnostic, and the full cost is covered.

However, if the doctor finds a condition that requires follow-up treatment (such as surgery for cancer or medication for inflammatory bowel disease), those separate treatments are covered under Medicare's regular rules, which may include copays or coinsurance depending on the type of treatment.

Original Medicare Versus Medicare Advantage Coverage

Both Original Medicare and Medicare Advantage plans are required by federal law to cover screening colonoscopy with zero out-of-pocket cost. The difference is in how you access the service. With Original Medicare, you can go to any doctor or facility that accepts Medicare. With Medicare Advantage, you typically must use doctors and facilities in your plan's network, or you may pay more.

Before scheduling a colonoscopy, call your Medicare Advantage plan to confirm that your preferred doctor and facility are in-network. Some plans require prior authorization — a pre-approval from the plan — before the procedure. Your doctor's office can often handle this step for you, but it is worth checking ahead to avoid delays.

What You Should Know About the Screening Age

Medicare covers screening colonoscopy starting at age 50 for people at average risk. If you have a family history of colorectal cancer, inflammatory bowel disease, or certain genetic conditions, your doctor may recommend screening earlier, and Medicare will cover it. If your previous colonoscopy found polyps, Medicare covers follow-up colonoscopies more frequently than the standard 10-year interval — typically every 3 to 5 years, depending on what was found.

If you are over 75, Medicare still covers screening colonoscopy, but your doctor may discuss whether screening is still right for you based on your overall health. The decision to screen is between you and your doctor; Medicare's coverage does not change based on age alone.

If You Have Both Medicare and Medicaid

If you are enrolled in both Original Medicare and your state's Medicaid program, Medicare is your primary payer and covers the colonoscopy at no cost. Medicaid does not add any additional payment. However, if you have Medicare Advantage and Medicaid, the coordination of benefits depends on your state's rules. Contact your state Medicaid office or your Medicare Advantage plan to understand how costs are handled in your situation.

Some states offer additional coverage through Medicaid that may help with costs not covered by Medicare, such as transportation to the appointment or preparation supplies. Your state Medicaid program can tell you what is available in your area.

What to Do Before Your Colonoscopy Appointment

Once your doctor orders a screening colonoscopy, call the facility where it will be performed and confirm that they accept Medicare. Bring your Medicare card to the appointment. You do not need to submit any paperwork or prior authorization for a screening colonoscopy with Original Medicare, though Medicare Advantage plans may require it.

Ask the facility in advance whether they will bill Medicare directly or whether you will need to pay upfront and seek reimbursement. Most facilities bill Medicare directly, so you should owe nothing at the time of the procedure. If a facility asks you to pay the full cost upfront, ask why — it may indicate they do not accept Medicare, and you should consider scheduling elsewhere.

Frequently Asked Questions

Do I have to pay anything out of pocket for a screening colonoscopy?

No. Medicare covers the entire cost of a screening colonoscopy — the procedure, anesthesia, and polyp removal if needed — with zero copay, coinsurance, or deductible. You should owe nothing at the time of the procedure or after.

What if my doctor finds something and wants to do a biopsy?

A biopsy (taking a tissue sample) during a colonoscopy is covered at no cost to you, just like polyp removal. The biopsy is considered part of the diagnostic process and does not change your out-of-pocket cost.

Does Medicare cover colonoscopy if I have symptoms like bleeding or pain?

Yes. When a colonoscopy is ordered because you have symptoms, it is considered diagnostic rather than screening, and Medicare covers it at no cost. Bring documentation of your symptoms to your appointment so the facility can code it correctly.

What if the facility is out of network for my Medicare Advantage plan?

Out-of-network facilities may charge you more, even for a screening colonoscopy. Before scheduling, confirm with your Medicare Advantage plan that the facility is in-network. If you need to use an out-of-network facility, ask your plan what you will owe.

How often does Medicare cover colonoscopy?

Medicare covers screening colonoscopy once every 10 years for people at average risk starting at age 50. If polyps are found, your doctor may recommend more frequent screening — typically every 3 to 5 years — and Medicare covers those additional procedures.