Reviewed by Dustin Brown, MS, FACHE. Last reviewed July 2026.
A cancer diagnosis brings enough worry without adding confusion about coverage, so here is the reassuring headline: Medicare covers cancer treatment broadly. The catch is that the coverage is split across Parts A, B, and D, and Original Medicare leaves you with cost-sharing that has no built-in cap, which is why supplemental coverage matters so much. This guide walks through what each part covers, what you will pay, and how to protect yourself financially. Coverage and costs change, so verify current details before relying on them.
The Short Answer
Yes. Medicare covers the full range of cancer care, from surgery and chemotherapy to radiation and oral drugs, but which part pays depends on the setting and the treatment. You typically face 20% coinsurance under Part B unless you have a Medigap policy or a Medicare Advantage plan with an out-of-pocket cap.
What Part A Covers
Part A, hospital insurance, covers cancer care you get as a hospital inpatient, including inpatient surgery to remove a tumor, inpatient chemotherapy, a semi-private room, and skilled nursing facility care after a qualifying hospital stay. It also covers surgically implanted breast prostheses after a mastectomy done as an inpatient. You pay the Part A deductible per benefit period, about $1,736 in 2026.
What Part B Covers
Part B, medical insurance, covers the large share of cancer care delivered on an outpatient basis: outpatient chemotherapy and radiation therapy, doctor visits, diagnostic tests and imaging, outpatient surgery, durable medical equipment, and some oral cancer drugs, specifically those that are also available as an injection. Part B also covers external breast prostheses and post-surgical bras after a mastectomy. After the Part B deductible, about $283 in 2026, you generally pay 20% of the Medicare-approved amount.
What Part D Covers
Part D, prescription drug coverage, pays for most oral and self-administered cancer drugs that Part B does not, which is a large and growing share of modern targeted therapy. Your cost depends on the plan’s formulary and tier. A major recent improvement: Part D now has an annual out-of-pocket cap, which meaningfully protects patients on expensive oral cancer drugs. Whether a given drug falls under Part B or Part D depends on how it is administered, a frequent source of confusion worth asking your care team about.
What Is Not Covered
A notable gap: Original Medicare does not cover wigs for chemotherapy-related hair loss, treating them as not medically necessary. Some Medicare Advantage plans offer a wig or related benefit, so check your plan. And the 20% Part B coinsurance has no cap under Original Medicare alone, which can add up quickly over months of treatment.
Clinical Trials
Medicare covers the routine costs of qualifying clinical trials, such as the office visits, tests, and services you would receive anyway, with the usual cost-sharing. The investigational treatment itself is usually paid by the trial sponsor. See our guide to cancer clinical trials for more.
Why Supplemental Coverage Matters
Because Original Medicare has no annual out-of-pocket limit, cancer’s high costs make supplemental coverage important. A Medigap policy pays much or all of the 20% Part B coinsurance and the Part A deductible, but works only with Original Medicare. A Medicare Advantage plan bundles coverage with an annual out-of-pocket maximum, but uses networks and prior authorization, so confirm your oncologist and cancer center are in-network. Deciding between these before a diagnosis, if possible, is worthwhile.
What to Do
Confirm whether each of your drugs is billed under Part B or Part D, review your Part D formulary, ask providers whether they accept assignment, and consider Medigap or Medicare Advantage for cost protection. If a service is denied, you have formal appeal rights through Medicare.
Which Parts of Medicare Cover Cancer Care
Cancer treatment involves many services, and different parts of Medicare cover them. Knowing this helps you plan.
Part A covers inpatient hospital stays. Part B covers outpatient care, such as chemotherapy in a clinic, doctor visits, and radiation. Part D covers prescription cancer drugs you take at home. A Medicare Advantage plan bundles these, often with its own network and rules.
Your Costs and the Out-of-Pocket Cap
Cancer care can be expensive, even with Medicare. Knowing your costs helps you prepare.
You typically pay deductibles and a share of costs under Parts A and B. Original Medicare has no yearly out-of-pocket cap, which is why many people add Medigap. Part D now has an annual cap on what you pay for covered drugs, which helps with costly cancer medications.
Financial Help for Cancer Patients
If costs are overwhelming, help exists. Several programs support people in cancer treatment.
Charitable foundations assist with copays and treatment costs for specific cancers. Hospital financial assistance can reduce bills. And the Part D Extra Help program lowers drug costs for those who qualify. Our guide to charities that help with medical bills lists more resources.
Medicare and Cancer Treatment FAQs
Is chemotherapy covered?
Yes. Part A covers inpatient chemotherapy, and Part B covers outpatient chemotherapy at 20% coinsurance after the deductible.
Are oral cancer pills covered?
Some are covered by Part B if an injectable version exists, but most oral cancer drugs are covered by Part D.
Does Medicare cover radiation?
Yes, under Part B for outpatient radiation, or Part A if you are an inpatient.
Are wigs covered?
No, not by Original Medicare. Some Medicare Advantage plans may offer a benefit.
Are clinical trials covered?
The routine care costs of qualifying trials are covered, while the sponsor usually covers the investigational treatment.
Is there a limit on my 20% coinsurance?
Not under Original Medicare alone. A Medigap policy or a Medicare Advantage plan’s out-of-pocket cap provides that protection.
