Frequently Asked Questions
Does Medicare cover chemotherapy?
Yes — Medicare Part B covers chemotherapy administered in a doctor's office or outpatient hospital setting. You pay 20% of the Medicare-approved amount after your Part B deductible. Oral chemotherapy drugs taken at home are covered under Part D. With Medigap Plan G, the 20% Part B coinsurance is fully covered.
Does Medicare cover radiation therapy?
Yes — Medicare Part B covers radiation therapy including external beam radiation and brachytherapy. You pay 20% coinsurance after the Part B deductible. If radiation requires a hospital stay, Part A covers the inpatient admission. Medigap plans cover the 20% coinsurance.
Does Medicare cover cancer surgery?
Yes — Medicare Part A covers inpatient cancer surgery including the hospital stay, operating room, anesthesia, and nursing care. Part B covers the surgeon's fee and outpatient surgical procedures. You pay the Part A deductible ($1,676 in 2026) plus 20% of surgeon fees — or $0 with Medigap Plan G.
Does Medicare cover cancer clinical trials?
Yes — Medicare covers routine care costs for Medicare beneficiaries participating in approved cancer clinical trials. This includes doctor visits, lab tests, and hospital stays related to your cancer treatment. The experimental drug or device itself may not be covered, but your regular care costs are.
Does Medicare cover cancer drugs?
It depends on how the drug is administered. IV chemotherapy administered in a clinical setting is covered under Part B. Oral chemotherapy pills taken at home are covered under Part D. Targeted therapies and immunotherapies follow the same rule — setting determines which part covers them.
Medicare covers most cancer treatments comprehensively — including chemotherapy, radiation therapy, surgery, immunotherapy, targeted therapy, and clinical trials. Understanding which Medicare part covers each treatment, and how to minimize your out-of-pocket costs, can save you tens of thousands of dollars during cancer care. Here is a complete breakdown.
Major cancer centers like Mayo Clinic, MD Anderson, Memorial Sloan Kettering, and most NCI-designated cancer centers accept Original Medicare. However, some do not participate in Medicare Advantage networks. If you have Medicare Advantage and need specialized cancer care, verify your plan's network before your first appointment — or consider switching to Original Medicare during Annual Enrollment.
Part B: Outpatient Cancer Treatment
Medicare Part B covers the majority of cancer treatment for most patients — because most chemotherapy and radiation is now administered in outpatient settings:
- Intravenous (IV) chemotherapy in a doctor's office or outpatient hospital infusion center
- Radiation therapy — external beam, stereotactic radiosurgery (Gamma Knife, CyberKnife), and brachytherapy
- Immunotherapy and targeted therapy administered by infusion
- Anti-nausea medications administered alongside chemotherapy
- Blood transfusions and other supportive infusions
- Lab tests and diagnostic imaging related to cancer monitoring
- Oncologist and specialist visits
For all Part B services, you pay 20% of Medicare-approved costs after your annual Part B deductible ($257 in 2026). There is no out-of-pocket maximum under Original Medicare — this is why Medigap coverage is especially important for cancer patients.
Part A: Inpatient Cancer Care
When cancer treatment requires a hospital admission, Part A takes over:
- Inpatient surgery including tumor removal, mastectomy, colostomy, and other cancer operations
- Hospital stays for complications of cancer or treatment (infections, dehydration, severe side effects)
- Inpatient chemotherapy when medically necessary
- Skilled nursing facility care after a qualifying 3-day hospital stay
- Hospice care for terminal cancer
You pay the Part A deductible ($1,676 per benefit period in 2026) for hospital stays up to 60 days. With Medigap Plan G, this deductible is fully covered.
Part D: Oral Cancer Medications
Oral chemotherapy agents — pills or capsules taken at home — are covered under Medicare Part D. This includes many targeted therapies (imatinib for CML, erlotinib for lung cancer), hormone therapies (tamoxifen, letrozole for breast cancer), and newer oral immunotherapy agents.
The 2026 $2,000 annual out-of-pocket cap on Part D is especially significant for cancer patients, many of whom previously spent $5,000–$15,000 annually on oral cancer medications. Once you reach the $2,000 cap, you pay $0 for covered drugs for the rest of the year.
Clinical Trials — Medicare Covers Your Routine Care
Medicare covers routine care costs for beneficiaries in approved clinical trials — meaning your regular cancer care (doctor visits, lab work, imaging, hospital care) is covered even when the trial drug or device itself is not. This removes a major financial barrier to clinical trial participation.
To qualify, the clinical trial must be approved by the National Institutes of Health, a federally funded research program, or meet other Medicare criteria. Ask your oncologist or the trial coordinator whether a specific trial qualifies for Medicare coverage of routine costs.
Why Medigap Is Critical for Cancer Patients
Without supplemental coverage, cancer treatment costs under Original Medicare can be catastrophic. A typical chemotherapy regimen might involve 6–12 months of weekly or biweekly infusions — each subject to 20% coinsurance with no maximum out-of-pocket cap.
| Treatment Scenario | Without Medigap | With Plan G |
|---|---|---|
| 6 months chemo ($120K approved) | $24,000 | $257 |
| Radiation (30 sessions) | $4,000–$8,000 | $0 |
| Cancer surgery + hospital | $3,000–$6,000 | $0 |
Your Action Plan as a Cancer Patient on Medicare
- Confirm your oncologist and cancer center accept Original Medicare before starting treatment
- If you have Medicare Advantage, verify your specific plan's cancer network — consider switching to Original Medicare at next AEP if your preferred cancer center is out of network
- If you don't have Medigap, apply immediately — the financial exposure without it during cancer treatment is enormous
- Review your Part D plan to ensure oral cancer medications are covered — switch plans during AEP if needed
- Ask your oncologist about clinical trial options — Medicare covers your routine care costs
- Never accept a Medicare denial without appealing — get your SHIP counselor involved
- Ask your oncologist's billing team to check for Medicare Part B drug billing errors — they are common