Quick Answer
Yes, Medicare covers biopsies that are medically necessary to diagnose or treat a health condition. Outpatient biopsies fall under Medicare Part B (you pay 20% coinsurance after the $283 deductible). Hospital inpatient biopsies fall under Medicare Part A (you pay nothing after the $1,736 deductible). Medicare Advantage plans cover biopsies at the same level as Original Medicare, though your cost-sharing depends on your specific plan.
Coverage Comparison by Plan Type
| Plan Type | Coverage | Notes |
|---|---|---|
| Medicare Part B (Outpatient) | Covered | Covers 80% after $283 Part B deductible; you pay 20% coinsurance |
| Medicare Part A (Inpatient) | Covered | Covers 100% after $1,736 Part A deductible for the benefit period |
| Medicare Advantage (Part C) | Covered | Must cover same services as Original Medicare; cost-sharing varies by plan |
| Medicare Supplement (Medigap) | Varies by Plan | Covers some or all of the 20% coinsurance left by Original Medicare |
Understanding Your Coverage Options
Original Medicare (Part a & B)
Covered when medically necessaryOriginal Medicare covers biopsies that are medically necessary - meaning your doctor has ordered the procedure to diagnose or treat a specific health condition. Biopsies are commonly associated with cancer screening, but they can also identify infections, inflammation, and other conditions.
The part of Medicare that applies depends on where you receive the biopsy. Most biopsies are performed on an outpatient basis at a doctor's office, clinic, or ambulatory surgery center - these fall under **Medicare Part B**. If you are admitted as a hospital inpatient and receive a biopsy during that stay, **Medicare Part A** applies instead.
Medicare also covers related services that may be part of the biopsy procedure, including anesthesia, imaging guidance (such as CT scans or ultrasound), and laboratory analysis of the tissue sample.
What It Covers
- Needle biopsies (fine needle aspiration and core needle biopsy)
- Surgical biopsies performed in outpatient settings
- Endoscopic biopsies (lung, bladder, colon, and other internal tissue)
- Skin biopsies for suspected cancer or abnormal growths
- Prostate biopsies when medically necessary
- Oral biopsies to diagnose mouth or oropharyngeal cancers
- Bone marrow biopsies for blood cancer diagnosis
- Breast biopsies following abnormal mammogram or exam
- Anesthesia and imaging guidance used during the biopsy
- Lab analysis of the tissue sample
What It Doesn't Cover
- Biopsies not ordered by a Medicare-participating provider
- Biopsies performed at a dentist's office (dental services are excluded)
- Elective biopsies with no documented medical necessity
Part B: You pay 20% coinsurance after the $283 annual deductible (2026). Part A: You pay $0 after the $1,736 per-benefit-period deductible for days 1–60 of a hospital stay.
Medicare Advantage (Part C)
Covered — cost-sharing varies by planMedicare Advantage plans are required by law to cover everything that Original Medicare covers, including medically necessary biopsies. However, private insurers set their own deductibles, copayments, and coinsurance rates — so your actual out-of-pocket costs may differ from Original Medicare.
One important difference: Medicare Advantage plans use provider networks. To keep your costs at the in-network rate, confirm that the doctor performing your biopsy and the facility where it is done are both in your plan's network before your procedure.
What It Covers
- All biopsy types covered by Original Medicare
- Anesthesia and imaging guidance during the procedure
- Lab processing of the tissue sample
What It Doesn't Cover
- Out-of-network providers (unless your plan has out-of-network benefits)
- Services not deemed medically necessary by your plan's criteria
Check Your Network before Scheduling
Call your Medicare Advantage plan before your biopsy to confirm the performing physician, facility, and lab are all in-network. Out-of-network services can result in significantly higher cost-sharing or no coverage at all.
Medicare Supplement (Medigap)
Covers some or all of Original Medicare's cost-sharingMedicare Supplement (Medigap) plans are designed to pay the out-of-pocket costs that Original Medicare leaves behind — including the 20% Part B coinsurance and the Part A deductible. Because Medicare covers biopsies, Medigap can significantly reduce or eliminate what you owe.
For example, Medigap Plan G covers the Part B coinsurance in full after you meet the annual Part B deductible. That means once you've paid your $283 deductible for the year, Plan G would cover the remaining 20% of your biopsy costs. Unlike Medicare Advantage, Medigap plans have no provider networks — any doctor who accepts Medicare will also accept your Medigap plan.
What It Covers
- Part B coinsurance (20%) — covered by most Medigap plans
- Part A deductible — covered by Plans D, G, and others
- Part B deductible — covered by Plan C and Plan F (for those eligible before Jan 1, 2020)
- Excess charges — covered by Plans F and G
What It Doesn't Cover
- Services not covered by Original Medicare
- Dental biopsies performed at a dentist's office
With Medigap Plan G, your only out-of-pocket cost for a biopsy is the $283 Part B deductible (2026). After that, Plan G covers the 20% coinsurance.
Estimated Biopsy Costs under Medicare (2026)
| Biopsy Setting | Medicare Part | What Medicare Pays | Your Cost (No Supplement) | Your Cost (With Plan G) |
|---|---|---|---|---|
| Doctor's office / outpatient clinic | Part B | 80% of approved amount | 20% coinsurance + $283 deductible | $283 deductible only (first time per year) |
| Ambulatory surgery center | Part B | 80% of approved amount | 20% coinsurance + $283 deductible | $283 deductible only (first time per year) |
| Hospital inpatient (days 1–60) | Part A | 100% after deductible | $1,736 per benefit period | $0 (Plan G covers Part A deductible) |
✦ Important: Biopsies Must be Medically Necessary
What 'Medically Necessary' Means for Biopsies
Medicare will only cover a biopsy if your doctor determines it is medically necessary — meaning it is needed to diagnose, treat, or manage a health condition. Your doctor must document the clinical reason for ordering the biopsy. Routine or elective biopsies without a documented medical indication are not covered.
If Medicare denies your biopsy claim as not medically necessary, you have the right to appeal. Ask your doctor to provide supporting documentation explaining why the biopsy was required.
Dental Biopsies: A Special Case
Medicare does not cover dental services, but it does cover biopsies to diagnose oral cancer. If your doctor or specialist orders an oral biopsy to investigate a suspicious lesion in your mouth or throat, Medicare Part B will cover it — even though routine dental care is excluded. The key distinction is that the biopsy must be ordered by a Medicare-participating physician or specialist, not a dentist.
✦ Frequently Asked Questions
David Haass
AuthorDavid Haass is the Chief Technology Officer and Co-Founder of Elite Insurance Partners and MedicareFAQ.com. He is a member and regular contributor to Forbes Finance Council.
Ashlee Zareczny
ReviewerAshlee Zareczny is a licensed Medicare agent in all 50 states dedicated to educating those eligible for Medicare. She trains agents on CMS compliance guidelines.