Medicare covers the full cost of a screening colonoscopy if you meet the age and frequency requirements, with no copay, coinsurance, or deductible.

Medicare Part B pays 100 percent of the procedure when your doctor performs it as a screening test — meaning you have no symptoms and it is done to check for cancer or polyps. You pay nothing out of pocket for the colonoscopy itself, the anesthesia, or the facility fee. This coverage applies once every 10 years if the results are normal, or more often if your doctor finds polyps or has other clinical reasons to repeat the test sooner.

The main condition is that your doctor must bill the procedure as a screening colonoscopy, not a diagnostic one. If you have symptoms like bleeding or abdominal pain, or if the doctor removes polyps during the procedure, Medicare may reclassify it as diagnostic. In that case, you could owe a copay or coinsurance — usually 20 percent of the Medicare-approved amount after you meet your Part B deductible. Ask your doctor's office in advance whether they expect the procedure to be billed as screening or diagnostic.

Key Takeaways

  • Medicare Part B covers screening colonoscopy at no cost to you if you are 50 or older and have not had one in the past 10 years.
  • The procedure must be billed as a screening test, not a diagnostic test, for you to avoid copays or coinsurance.
  • If your doctor removes polyps or finds abnormalities during the procedure, Medicare may bill it as diagnostic and you may owe 20 percent coinsurance.
  • Ask your doctor's office before the appointment whether they expect to bill it as screening or diagnostic, and whether any findings might change that.
  • If you have a Medigap or Medicare Advantage plan, your out-of-pocket costs may differ from Original Medicare.

Age and Frequency Requirements

You must be at least 50 years old for Medicare to cover a screening colonoscopy. If you are 50 to 75, Medicare covers the procedure once every 10 years if your last colonoscopy was normal. If you are 76 or older, Medicare does not routinely cover screening colonoscopy, though your doctor can still order one if they believe it is medically necessary — in which case you may owe coinsurance.

If your previous colonoscopy found polyps, your doctor may recommend a repeat procedure sooner than 10 years. Medicare will cover this if your doctor documents the medical reason. For example, if large polyps were removed, your doctor might schedule a follow-up in 3 to 5 years. Bring any records from your previous colonoscopy to your appointment so your doctor can note the findings and timing.

Screening Versus Diagnostic: Why the Difference Matters

A screening colonoscopy is performed when you have no symptoms and no known reason to suspect cancer or polyps — it is a preventive test. Medicare covers this at 100 percent. A diagnostic colonoscopy is performed because you have symptoms (bleeding, pain, changes in bowel habits) or because your doctor suspects a problem. Medicare covers diagnostic colonoscopy, but you pay coinsurance — typically 20 percent of the approved amount after your deductible.

The billing code your doctor uses determines which category Medicare assigns. If your doctor finds and removes polyps during a screening colonoscopy, Medicare may convert the entire procedure to a diagnostic code, which means you could owe coinsurance on the whole visit. Some doctors' offices will absorb this cost or waive it; others will bill you. Call your doctor's office before your appointment and ask: "Will this be billed as a screening colonoscopy, and if you find polyps, will I owe anything extra?" Getting this in writing protects you.

What Is Covered and What Is Not

Medicare Part B covers the colonoscopy procedure itself, the anesthesia (usually sedation), the facility fee, and the pathology if a biopsy is taken. You pay nothing for any of these when the procedure is billed as screening. If your doctor removes a polyp, that removal is included in the screening colonoscopy coverage — you do not pay extra.

Medicare does not cover the cost of preparation supplies, such as the bowel-cleansing solution you drink before the procedure. You will need to purchase this yourself, though some solutions are available over the counter at a low cost. Your doctor's office will tell you which preparation to use. If you have questions about the cost, ask the office whether they have samples or lower-cost alternatives.

How to Prepare and What to Expect

Your doctor will give you detailed instructions on how to prepare, usually involving a clear-liquid diet for one or two days and a bowel-cleansing solution. Follow these instructions exactly — incomplete preparation can mean the procedure has to be repeated. Arrange for someone to drive you home, because the sedation used during colonoscopy impairs your ability to drive safely for the rest of the day.

The procedure itself takes 20 to 30 minutes. You will be sedated and will not feel pain. Afterward, you may feel bloated or have mild cramping, which usually passes within an hour. Your doctor will discuss any findings with you before you leave and will send a report to your primary care doctor. If polyps were removed, your doctor will tell you when to schedule your next colonoscopy.

Medicare Advantage and Medigap Plans

If you have a Medicare Advantage plan (Part C), your coverage for colonoscopy may differ from Original Medicare. Most Medicare Advantage plans cover screening colonoscopy at no cost, but some may require you to use in-network providers or may have different copay amounts. Check your plan's summary of benefits or call the plan directly to confirm your coverage before you schedule.

If you have a Medigap plan (supplemental insurance), it typically covers the coinsurance you would owe under Original Medicare. This means if your procedure is billed as diagnostic and you would normally owe 20 percent coinsurance, your Medigap plan may pay that amount. Review your Medigap policy or call your insurer to confirm what it covers for colonoscopy.

Finding a Provider and Scheduling

You can schedule a colonoscopy through your primary care doctor or a gastroenterologist. Make sure the provider accepts Medicare. You can search for Medicare-enrolled providers on the Medicare provider search tool at Medicare.gov, or call your doctor's office and ask whether they accept Medicare. When you call to schedule, tell the office that you want a screening colonoscopy and ask them to confirm that Medicare will cover it at no cost.

Some providers have long wait times, so schedule as soon as your doctor recommends. If you are over 75 or have other health conditions, your doctor may want to discuss whether screening colonoscopy is still right for you before scheduling. This conversation is important — screening colonoscopy is most beneficial for people in good health with a life expectancy of at least 10 years.

Frequently Asked Questions

What if I have symptoms like bleeding or abdominal pain?

Tell your doctor about your symptoms before the procedure. Your doctor will likely bill it as a diagnostic colonoscopy, which means you may owe coinsurance. However, Medicare will still cover the procedure — you just pay 20 percent of the approved amount after your Part B deductible. This is medically necessary care, and you should not delay it because of cost concerns.

Do I have to pay for the bowel-cleansing solution?

Yes, you pay for the preparation solution yourself. It is available over the counter and costs between $10 and $40 depending on the brand. Ask your doctor's office which solution they recommend — some are less expensive than others. Your doctor will provide specific instructions on which product to use and how much to take.

What happens if polyps are found and removed?

If your doctor removes polyps during a screening colonoscopy, Medicare may bill the entire procedure as diagnostic, which could result in a 20 percent coinsurance charge. Ask your doctor's office in advance about their billing practices. Some offices will not charge you extra; others will bill you the coinsurance amount. Get this in writing before your procedure.

Can I get a colonoscopy if I am over 75?

Medicare does not routinely cover screening colonoscopy for people over 75. However, your doctor can still order one if they believe it is medically necessary, and Medicare will cover it — but you may owe coinsurance. Talk with your doctor about whether screening colonoscopy is right for you based on your overall health and life expectancy.

Will my Medicare Advantage plan cover colonoscopy the same way?

Most Medicare Advantage plans cover screening colonoscopy at no cost, but coverage varies by plan. Some plans may require you to use in-network providers or may have different copay amounts. Check your plan's summary of benefits or call your plan directly before you schedule to confirm your coverage.