Medicare covers colonoscopies for screening and diagnosis at no cost to you
Medicare Part B covers colonoscopies performed for screening (looking for cancer or polyps when you have no symptoms) at no charge — you pay nothing out of pocket. If the doctor finds and removes polyps during a screening colonoscopy, that removal is also covered at no cost. If the colonoscopy is diagnostic (performed because you have symptoms like bleeding or abdominal pain), Medicare covers it, but you may owe a copay or coinsurance depending on your plan.
The coverage rules depend on your age and whether you have had a colonoscopy before. Medicare covers screening colonoscopies every 10 years starting at age 50, or every 5 years if you are at higher risk. If you have a Medicare Advantage plan (Part C) instead of Original Medicare, your coverage may differ — check your plan documents or call the plan directly.
Key Takeaways
- Screening colonoscopies (no symptoms) are covered at zero cost under Medicare Part B if performed at a Medicare-enrolled facility.
- Medicare covers one screening colonoscopy every 10 years for people 50 and older, or every 5 years if you have risk factors like a family history of colorectal cancer.
- If polyps are found and removed during a screening colonoscopy, the removal is covered at no additional charge.
- Diagnostic colonoscopies (performed because of symptoms) are covered but may require you to pay a copay or coinsurance.
- Medicare Advantage plans may have different rules; contact your plan to confirm your coverage before scheduling.
How Medicare defines screening versus diagnostic colonoscopies
A screening colonoscopy is performed when you have no symptoms and the doctor is looking for early signs of colorectal cancer or polyps. Medicare covers this at 100 percent — you owe nothing. The procedure code your doctor uses determines whether Medicare treats it as screening or diagnostic, so it is important that your doctor codes it correctly.
A diagnostic colonoscopy is performed because you have symptoms such as blood in your stool, chronic diarrhea, abdominal pain, or anemia. Medicare covers diagnostic colonoscopies, but you typically owe a copay (usually $20) or coinsurance (usually 20 percent of the approved amount). If the doctor finds polyps during a diagnostic colonoscopy and removes them, the removal itself is covered, but you still owe the copay or coinsurance for the procedure.
If a screening colonoscopy becomes therapeutic — meaning the doctor finds and removes polyps — the entire procedure remains covered at no cost. You do not pay extra for the removal. However, if complications arise during the procedure, such as perforation of the colon, those complications may be billed separately.
Age and frequency requirements for free screening
Medicare covers screening colonoscopies starting at age 50. You are covered for one screening colonoscopy every 10 years if you are at average risk for colorectal cancer. If you have a family history of colorectal cancer, inflammatory bowel disease, or a personal history of polyps, you may be covered for screening every 5 years instead.
If you have never had a colonoscopy, you are covered regardless of how long it has been since your last screening. If your last screening was more than 10 years ago, Medicare will cover a new one at no cost. If your last screening was fewer than 10 years ago and you have no symptoms, a new screening colonoscopy may not be covered unless your doctor documents that you are at higher risk.
Age 85 and older: Medicare does not automatically exclude people over 85 from screening colonoscopies, but your doctor may recommend against screening based on your overall health. The decision to screen should be made between you and your doctor.
What you need to do before your colonoscopy
Call your doctor's office and confirm that they are a Medicare provider and that they will bill Medicare directly. Ask them to code the procedure as a screening colonoscopy if you have no symptoms. This coding is crucial — if it is coded as diagnostic when it should be screening, you may be billed incorrectly.
Bring your Medicare card to your appointment. If you have a Medicare Advantage plan, bring that card instead and confirm with your doctor that they accept your plan. If you have a Medigap policy (supplemental insurance), bring that card as well — it may cover any copay or coinsurance you would otherwise owe.
Ask your doctor's office in advance whether they will charge you anything. For a screening colonoscopy with no complications and no polyp removal, the answer should be no. If they say you will owe money, ask why — it may be a billing error, or the procedure may be coded as diagnostic rather than screening.
What happens if polyps are found and removed
If polyps are found during a screening colonoscopy and removed, you still owe nothing. The removal is considered part of the screening procedure and is covered at 100 percent. Your follow-up colonoscopy schedule may change based on what was found — your doctor will tell you when to return.
If a polyp is large or complex and cannot be removed during the initial colonoscopy, you may need a follow-up procedure. That follow-up procedure may be coded as diagnostic rather than screening, which could mean you owe a copay or coinsurance. Ask your doctor in advance if a follow-up is likely and how it will be billed.
Medicare Advantage plans and colonoscopy coverage
If you have a Medicare Advantage plan (Part C), your coverage for colonoscopies is set by your plan, not by Original Medicare. Most Medicare Advantage plans cover screening colonoscopies at no cost, but some may require a copay. Some plans may also limit which doctors or facilities you can use.
Contact your Medicare Advantage plan before scheduling your colonoscopy to confirm coverage. Ask whether the doctor and facility are in-network, whether you need a referral, and whether you will owe any out-of-pocket costs. If your plan requires a copay for screening colonoscopies, that copay is typically lower than for diagnostic procedures.
What to do if you receive a bill
If you receive a bill for a screening colonoscopy, do not ignore it. Call your doctor's office first and ask why you were billed. It may be a coding error — the procedure may have been coded as diagnostic when it should have been screening. Ask the office to resubmit the claim with the correct code.
If the office cannot resolve it, contact Medicare directly at 1-800-MEDICARE (1-800-633-4227). You can also file an appeal with Medicare if you believe the charge is incorrect. Keep copies of all bills, explanation of benefits statements, and correspondence with your doctor's office.
If you have a Medigap policy, contact your supplemental insurance company. They may cover the bill even if Medicare does not, depending on your policy.
Frequently Asked Questions
Do I have to pay anything for a screening colonoscopy?
No. If the colonoscopy is coded as screening and you have no symptoms, Medicare Part B covers it at 100 percent. You owe nothing, even if polyps are found and removed. If you have a Medicare Advantage plan, check your plan documents — most cover screening colonoscopies at no cost, but a few may charge a copay.
What if I have symptoms like blood in my stool?
If you have symptoms, the colonoscopy is diagnostic, not screening. Medicare covers it, but you typically owe a copay (usually $20) or coinsurance (usually 20 percent). The copay or coinsurance applies to the procedure itself, not to any polyp removal that occurs during it.
How often does Medicare cover colonoscopies?
Medicare covers one screening colonoscopy every 10 years if you are at average risk. If you have a family history of colorectal cancer or a personal history of polyps, you may be covered every 5 years. Your doctor will determine your risk level and recommend the appropriate interval.
Will my Medicare Advantage plan cover a colonoscopy the same way?
Most Medicare Advantage plans cover screening colonoscopies at no cost, but coverage varies by plan. Some plans may require a copay or may limit which doctors you can see. Contact your plan before scheduling to confirm your coverage and whether you need a referral.
What should I do if my doctor's office says I owe money for a screening colonoscopy?
Ask the office why you are being billed. It may be a coding error. Request that they resubmit the claim with the correct screening code. If they cannot resolve it, contact Medicare at 1-800-MEDICARE or file an appeal with Medicare.