Yes, Medicare covers colonoscopies—and in most screening situations, you pay nothing. Medicare Part B covers colonoscopies as a preventive service with $0 cost-sharing when you use a Medicare-participating provider and the procedure is purely for screening.
Two Types of Colonoscopy Coverage
| Screening colonoscopy | Diagnostic colonoscopy |
| Purpose: routine cancer screening | Purpose: symptoms or follow-up |
| $0 cost to you (no deductible, no coinsurance) | 20% coinsurance after Part B deductible |
| Every 10 years for average-risk patients | As often as medically necessary |
| Every 2 years if high risk | High-risk: every 2 years at $0 |
The Surprise Bill Problem: When a Screening Becomes Diagnostic
This is the most common Medicare colonoscopy complaint. If your doctor removes a polyp during what started as a screening colonoscopy, Medicare may reclassify the procedure as diagnostic—and you could owe 20% coinsurance.
Congress partially fixed this in 2022. The law phases out the cost-sharing on polyp removal during screening colonoscopies through 2030, when it will be fully $0. In 2026, your coinsurance is significantly reduced but may not be zero. Ask your provider before your procedure.
Preparation and Anesthesia Coverage
- Anesthesia is typically covered as part of the procedure
- Bowel prep medication may be covered under Part D (check your drug plan)
- Pre-procedure office visit covered under Part B
How to Pay $0 for Your Colonoscopy
- Schedule with a Medicare-participating provider
- Make sure your doctor documents it as a screening procedure
- If you have a Medigap plan, confirm it covers Part B coinsurance
- Verify anesthesiologist also accepts Medicare assignment
