Medicare's Home Infusion Therapy Benefit: What It Covers

Receiving intravenous therapy at home instead of in a hospital or infusion center sounds like a straightforward improvement — same drug, fewer trips, familiar surroundings. Medicare's coverage of it is not straightforward at all. Three separate benefits can be involved: one pays for the pump, another for the drug, and a third for the nurse who comes to the house. Whether all three line up depends on which drug you need. When they do not, patients discover the gap the hard way, usually when a nursing bill arrives. Here is how the pieces work in 2026.

Three Benefits, One Treatment

The pump and the drug: the Part B durable medical equipment benefit. Medicare covers external infusion pumps and a defined list of drugs administered through them under the DME benefit. The list is limited — not every infused drug is on it.

The professional services: the Part B home infusion therapy (HIT) services benefit. Since 2021, this permanent benefit covers the services that surround the infusion, furnished by a qualified home infusion therapy supplier in your home:

• Nursing services provided under a physician-established plan of care
• Training and education on using the pump and managing the therapy
• Remote monitoring and other monitoring services

The drug alone, in some cases: Part D. If an infused drug is not covered under the Part B DME benefit, your Part D plan may cover the drug itself — but Part D does not pay for the pump, the supplies, or the nursing visits. Our guide to Part B vs. Part D drugs explains the general dividing line.

Which Drugs Qualify

The HIT services benefit applies only to a subset of drugs covered under the external infusion pump benefit — drugs administered intravenously, or subcutaneously through a pump that qualifies as durable medical equipment. Medicare groups those drugs into three payment categories that broadly cover:

• Certain intravenous drugs, including some antifungals and antivirals, certain cardiac and pulmonary hypertension drugs, pain management therapies, and chelation therapy
• Certain subcutaneous infusions, including some immune therapies
• Intravenous chemotherapy and related biologicals

The most common gap: many home IV antibiotic courses do not fall under the Part B pump benefit. In those situations the drug may be covered under Part D while the nursing and supplies are not covered at all — which is why it is worth confirming coverage for each component before therapy starts.

Where Home Health Fits In

There is a second route to covered nursing at home. If you qualify for the Medicare home health benefit — generally requiring that you be homebound and need skilled care under a physician-certified plan of care — nursing visits are covered under that benefit instead, at no cost sharing for the visits themselves.

The distinction matters because the two benefits have different eligibility rules:

• Home health requires homebound status; the HIT services benefit does not
• HIT services are paid only for days when a skilled professional is in the home providing the infusion-related service
• A patient who is homebound and needs infusion therapy may be served under home health; someone who is mobile but needs infusions generally is not

Ask the discharge planner or infusion provider which benefit they intend to bill. That single question resolves most of the confusion up front.

What You Pay in 2026

Under Original Medicare, both the drug/pump side and the professional services side follow standard Part B cost sharing:

• $283 annual Part B deductible
• 20% coinsurance of the Medicare-approved amount after the deductible, with no annual cap under Original Medicare
• A Medigap policy may cover the 20%, depending on the plan letter

In a Medicare Advantage plan, cost sharing is set by the plan, the supplier generally must be in-network, and prior authorization is common for infusion therapy. Those amounts count toward the plan's out-of-pocket maximum — no more than $9,250 in-network in 2026. See our guide to prior authorization for how those reviews work.

If the drug is billed under Part D instead, your costs follow the Part D structure — a deductible of up to $615, then plan cost sharing, with out-of-pocket spending capped at $2,100 in 2026. Our guide to the Part D out-of-pocket cap explains how the cap works.

IVIG at Home

Immune globulin therapy has its own history in Medicare. Part B has long covered the immune globulin itself for people with a diagnosed primary immunodeficiency disease who receive it at home, but for years the items and services needed to administer it were not separately covered outside a demonstration program. Medicare now covers those administration items and services as an ongoing benefit for people who meet the criteria.

If you or a family member receives IVIG at home, ask the supplier specifically how the administration services are being billed — that is the piece that historically fell through the cracks.

Requirements and Practical Steps

The provider must be a qualified home infusion therapy supplier, separately enrolled and accredited for this benefit. A company enrolled as a DME supplier is not automatically qualified to bill the HIT services benefit.

A physician must establish and periodically review a plan of care. The plan of care documents the therapy, the duration, and the professional services required.

Before therapy begins, a short checklist:

1. Ask which benefit pays for each piece — the pump, the drug, and the nursing visits
2. Confirm the supplier is a qualified HIT supplier, not only a DME supplier
3. If you are in Medicare Advantage, confirm network status and that prior authorization is approved in writing
4. Ask for a written cost estimate, including the coinsurance on each component
5. Ask whether home health would apply instead, if you are homebound
6. Get the plan of care documented by your physician before the first visit

Access to this benefit has been a recurring policy discussion, with patient and industry groups arguing the drug list is too narrow to match how infusion therapy is actually practiced. Rules and payment categories are updated annually, so confirm current details with the supplier and with Medicare rather than relying on a prior year's experience.

How to Get Help and Learn More

• Medicare.gov — See medicare.gov/coverage/home-infusion-therapy-services for the official description of the benefit.
• 1-800-MEDICARE (1-800-633-4227) — To confirm whether a specific drug or service is covered. TTY users can call 1-877-486-2048.
• State Health Insurance Assistance Program (SHIP) — Free, unbiased help sorting out which benefit applies and appealing denials, at shiphelp.org.

Summary and Next Steps

• Home infusion involves up to three benefits: the DME benefit (pump and certain drugs), the home infusion therapy services benefit (nursing, training, monitoring), and sometimes Part D (drug only)
• The HIT services benefit covers only a subset of drugs infused through a covered external pump
• Home IV antibiotics are a common gap — the drug may fall under Part D while nursing and supplies are not covered
• If you are homebound, the home health benefit may cover skilled nursing visits instead
• Under Original Medicare you pay the $283 deductible and 20% coinsurance; Medigap may cover the 20%
• The supplier must be a qualified home infusion therapy supplier, and a physician must establish a plan of care

Before the first infusion at home, ask one question of the provider: which Medicare benefit is billed for the pump, the drug, and the nurse? If any of the three has no clear answer, that is where the bill will come from.