Medicare covers chemotherapy, but the amount you pay depends on which part of Medicare you have and where you receive treatment

Medicare Part B covers chemotherapy drugs administered in a hospital outpatient department or doctor's office. Medicare Part D covers chemotherapy pills you take at home. If you are in a Medicare Advantage plan (Part C), your coverage works differently — your plan sets its own rules, though it must cover at least what Original Medicare does. The cost to you is not zero: you will pay a copay, coinsurance, or both, depending on your plan and the specific drug.

The key distinction is where you receive chemotherapy. Hospital inpatient chemotherapy (you stay overnight) is covered under Part A. Outpatient chemotherapy — the most common setting — is covered under Part B. Oral chemotherapy taken at home is covered under Part D. Each has different cost rules, and understanding which applies to you will tell you what to expect when the bill arrives.

Key Takeaways

  • Medicare Part B covers chemotherapy given in a hospital outpatient setting or doctor's office, and you pay 20 percent coinsurance after you meet your Part B deductible.
  • Medicare Part D covers chemotherapy pills taken at home, with copays or coinsurance that vary by drug and plan.
  • Hospital inpatient chemotherapy is covered under Part A, with a copay per day for days 1–60 of your stay.
  • Medicare Advantage plans must cover chemotherapy but set their own copays and may require prior authorization before treatment begins.
  • Chemotherapy drugs on the Medicare Part D formulary (covered drug list) are not all covered the same way — some require prior authorization or step therapy.

How Part B covers outpatient chemotherapy

Outpatient chemotherapy — given in a hospital outpatient clinic, cancer center, or oncologist's office — is covered under Medicare Part B. You pay 20 percent coinsurance of the Medicare-approved amount for the drug and the administration (the nurse's time and equipment). You also pay the full Part B deductible ($240 in 2024, though this changes yearly) before coinsurance kicks in.

The Medicare-approved amount is not the same as the price the hospital or clinic charges. Medicare sets what it will pay, and you pay 20 percent of that amount. If the provider charges more than Medicare allows, you are not responsible for the difference — that is called balance billing, and it is illegal. Ask your oncologist's office or hospital billing department what the Medicare-approved amount is for your specific chemotherapy regimen before treatment starts.

If you have a Medigap (supplemental insurance) plan, it may cover some or all of your 20 percent coinsurance. If you have Medicaid as well as Medicare, Medicaid may cover your coinsurance. Check your plan documents or call your insurer to know what you will owe out of pocket.

How Part D covers chemotherapy pills

Oral chemotherapy — pills or capsules you take at home — is covered under Medicare Part D, the prescription drug plan. Part D plans vary widely in which drugs they cover and how much you pay. Each plan has a formulary, a list of covered drugs. Not all chemotherapy pills are on every formulary, and some are covered only if you try a different drug first (called step therapy).

Your out-of-pocket cost for an oral chemotherapy drug depends on which tier it is on your plan's formulary. Tier 1 drugs (generics) have the lowest copay. Tier 2 (preferred brand-name) drugs cost more. Tier 3 and higher tiers cost even more. Some plans place chemotherapy drugs on specialty tiers with copays of $100 to $500 or more per month.

Before you start taking an oral chemotherapy drug, ask your oncologist to check with your Part D plan to see if the drug is covered and what your copay will be. Many plans require prior authorization — the doctor must get written approval from the plan before you fill the prescription. This can delay treatment by a few days, so start the process as soon as your oncologist prescribes the drug.

How Part A covers inpatient chemotherapy

If you receive chemotherapy as an inpatient (admitted to the hospital overnight), it is covered under Medicare Part A. You pay a copay per day: $408 per day for days 1–60 of your hospital stay in 2024 (this amount changes yearly). After 60 days, the copay increases. After 90 days, you pay the full cost unless you use lifetime reserve days, which are limited.

Most chemotherapy is given in an outpatient setting, so inpatient coverage is less common. However, if your treatment requires close monitoring, if you have serious side effects, or if you need chemotherapy combined with other inpatient care, you may be admitted. Your oncologist and the hospital will determine whether inpatient admission is medically necessary.

Medicare Advantage coverage for chemotherapy

If you are in a Medicare Advantage plan (Part C), your coverage for chemotherapy is set by your plan, not by Original Medicare. Your plan must cover chemotherapy drugs that Original Medicare covers, but it can set different copays, coinsurance amounts, and rules. Some plans require prior authorization before you start chemotherapy. Others require you to use certain hospitals or oncology centers in their network.

Call your Medicare Advantage plan before your first chemotherapy appointment. Ask whether the specific drug your oncologist prescribed is covered, what your copay or coinsurance will be, whether prior authorization is required, and whether your oncologist is in the plan's network. If your oncologist is out of network, the plan may not cover the treatment, or you may pay more.

If your plan denies coverage for a chemotherapy drug your oncologist prescribed, you have the right to request an appeal. Your oncologist can submit medical documentation explaining why the drug is medically necessary. The plan must respond to your appeal within 72 hours for urgent requests.

What chemotherapy costs you out of pocket

Your actual out-of-pocket cost depends on which Medicare plan you have, which chemotherapy drug you receive, and where you receive it. For outpatient chemotherapy under Part B, you typically pay 20 percent coinsurance after your deductible. For oral chemotherapy under Part D, you pay a copay or coinsurance based on your plan's formulary tier. For inpatient chemotherapy under Part A, you pay a daily copay.

Many chemotherapy drugs are expensive. A single infusion can cost $5,000 to $15,000 or more before insurance. Your 20 percent coinsurance under Part B can add up quickly. If you reach your Part D out-of-pocket spending limit (which varies by plan but is typically $7,000 to $8,000 in 2024), catastrophic coverage kicks in and you pay a smaller percentage of the cost for the rest of the year.

Ask your oncologist's office or hospital billing department for an estimate of your out-of-pocket cost before treatment starts. Many cancer centers have financial counselors who can help you understand your costs and may know about patient information programs run by drug manufacturers that can reduce your copays.

Prior authorization and step therapy for chemotherapy

Before you start chemotherapy, your oncologist's office may need to get approval from Medicare or your Medicare Advantage plan. This is called prior authorization. For Part B drugs given in an office or hospital, prior authorization is less common but can happen. For Part D oral drugs, prior authorization is routine.

Some plans also use step therapy: they require you to try a less expensive drug first, and only if it does not work can you move to the drug your oncologist preferred. Step therapy can delay treatment. If your oncologist believes step therapy will harm your health, they can request an exception. Ask your doctor to submit the exception request in writing and to mark it urgent if your condition requires fast treatment.

Frequently Asked Questions

Does Medicare cover chemotherapy for all types of cancer?

Medicare covers chemotherapy drugs that the Food and Drug Administration (FDA) has approved for cancer treatment. If your oncologist prescribes an FDA-approved drug, Medicare will cover it. However, if your doctor prescribes a drug off-label (for a use the FDA did not approve), Medicare may not cover it, though your plan can request coverage on a case-by-case basis.

What if my chemotherapy drug is not on my Part D plan's formulary?

If your prescribed drug is not covered, you can ask your oncologist to request a formulary exception. Your doctor submits a letter explaining why that specific drug is medically necessary. The plan must respond within 72 hours for urgent requests. If the plan denies the exception, you can appeal. You can also switch to a different Part D plan during the annual enrollment period if another plan covers the drug.

Do I have to pay for chemotherapy drugs if I am in a clinical trial?

If you are in a Medicare-approved clinical trial, Medicare covers the chemotherapy drugs used in the trial as part of the trial. You should not be charged for the drug itself, though you may pay your normal copay or coinsurance for related care like doctor visits or lab tests. Ask the trial coordinator which costs Medicare covers before you enroll.

Can I get help paying my chemotherapy copays?

Yes. Many drug manufacturers offer patient information programs that reduce or eliminate copays for their chemotherapy drugs. Cancer nonprofits like CancerCare and the American Cancer Society also offer copay information. Your oncologist's office or hospital financial counselor can help you find programs you may be able to use. These programs have income limits, so ask about them early.

Does Medicare cover chemotherapy side effect medications?

Yes. Medications to manage chemotherapy side effects — such as nausea, low blood cell counts, or pain — are covered under the same Medicare part as your chemotherapy. Anti-nausea drugs given during infusion are covered under Part B. Anti-nausea pills you take at home are covered under Part D. You pay your normal copay or coinsurance for these drugs.