Short answer up top, then the exact rule. Here's what Original Medicare does and doesn't cover for chemotherapy in 2026 — and where a Medicare Advantage plan can fill the gap.
Quick answer: Yes. If you get chemotherapy as a hospital outpatient, in a doctor's office, or in a freestanding clinic, Part B covers it — after the Part B deductible you pay 20% of the Medicare-approved amount. If you're admitted as a hospital inpatient, Part A covers it as part of your stay. Chemo pills you take at home are usually covered under a Part D drug plan.
Medicare Advantage (Part C) plans must cover chemotherapy at least as well as Original Medicare, but they use their own provider networks, prior-authorization rules, and copays. Confirm your oncologist and infusion center are in-network and check the plan's cost-sharing before treatment starts.
Anyone facing cancer treatment, and their families. The practical thing to understand is that the same chemo can be billed under Part B, Part A, or Part D depending on the setting — a Medigap plan can pick up the Part B 20% coinsurance, which otherwise has no annual out-of-pocket cap under Original Medicare alone.
See the current Part A, Part B, and Part D numbers — premiums, deductibles, and the new drug cap — in one place. Free, no signup.
See 2026 Medicare Costs →For outpatient chemo (hospital outpatient, doctor's office, or freestanding clinic), you pay 20% of the Medicare-approved amount after the Part B deductible; a single hospital-outpatient copay can't exceed the Part A hospital deductible. Inpatient chemo falls under the Part A deductible and coinsurance. A Medigap plan can cover the Part B 20%.
Often yes — many oral (pill) chemotherapy drugs are covered under a Part D prescription drug plan, where your cost depends on the plan's formulary and the annual Part D out-of-pocket cap. Some oral cancer drugs that have an infused equivalent are instead covered under Part B.
Coverage gaps in Original Medicare — like chemotherapy — are exactly what a Medicare Advantage or Medigap plan is meant to fill. Our free Enrollment Finder shows the window you can switch in, and the guide library walks through the trade-offs. This page is free to share with anyone weighing their options.
Open the Enrollment Finder →This answer is based on U.S. government Medicare coverage rules: