Medicare Part A Explained: Coverage, Costs, and the Catches

Is Medicare Part A Free?

For most people, yes, Medicare Part A is free—with an important distinction.

Part A has no monthly premium if you (or your spouse) worked and paid Medicare taxes for at least 10 years (40 quarters, or “work credits”). Roughly 99% of beneficiaries meet this threshold.

It’s important to remember that having no premium doesn’t mean having no costs. Once you start using Part A benefits, deductibles and daily charges apply, and they vary depending on the type of care and how long you receive it.

If you don’t have 40 work credits, you can still voluntarily enroll in Part A, but you’ll pay a monthly premium:

• If you or your spouse has at least 30 work credits, you will pay a reduced premium of $311/month.

• If neither you nor your spouse has at least 30 work credits, you will pay the full premium of $565/month.

Low-income beneficiaries in this situation may qualify for assistance through Medicare Savings Programs (MSPs), which are administered by individual states.

A Note on Terms You’ll See Throughout This Guide

Medicare Part A uses both, depending on the service. We’ll denote which applies in each section below.

What Does Medicare Part A Cover?

Medicare Part A coverage comprises four different types of care. Each has its own rules for who qualifies and what you’ll pay.

1. Inpatient Hospital Care

What It Covers

Medically necessary stays in an acute care hospital, including a semi-private room, meals, nursing care, and most hospital services and supplies.

What You Pay

Here’s how Medicare Part A premiums break down for 2026: 

What’s a Benefit Period?

Each hospital stay starts a benefit period, which ends once you’ve been discharged and have gone 60 consecutive days without inpatient care. If you’re readmitted after that 60-day window, the benefit period resets, and so does the $1,736 deductible.

*Lifetime Reserve Days

Lifetime reserve days are a one-time pool of 60 days you can draw from once your regular 90 days are exhausted. Once they’re used across any hospitalizations, they’re gone.

The Catch

Many people focus on the deductible and miss the daily charges that kick in after day 60. A 90-day hospital stay, while uncommon, would cost a beneficiary $1,736 plus $13,020 in daily charges—nearly $15,000 out of pocket. This is the gap that Medigap supplemental insurance is designed to cover.

2. Skilled Nursing Facility (SNF) Care

What It Covers

Short-term skilled care in a Medicare-certified nursing facility, typically following a hospital stay for services like wound care, IV medications, or physical, occupational, or speech therapy.

How to Qualify

To qualify for skilled nursing facility care, all of the following must be true:

• You had a qualifying hospital stay of at least 3 consecutive inpatient days (observation stays don’t count; more on this below)
• You were admitted to the SNF within 30 days of hospital discharge
• A physician ordered skilled care, and that care is provided daily or near-daily
• The facility is Medicare-certified

What You Pay

SNF coverage is also tied to benefit periods. If you’ve been out of both the hospital and a skilled nursing facility for 60 consecutive days, the benefit period resets, and the clock starts over.

The Catch

This one is critical: Medicare does not cover custodial nursing home care. This means help with daily activities (bathing, dressing, eating, getting in and out of bed) is not covered under Part A, even if it’s provided in a nursing facility. Many people believe Medicare covers long-term nursing home placement. It does not. Part A covers skilled services only, and only when medically necessary and of limited duration.

The second catch: observation days (time spent in a hospital under observation, rather than as a formally admitted patient) do not count toward the 3-day qualifying stay requirement for your SNF coverage. If you’re hospitalized for several days but technically on observation status, you may not be eligible for Part A SNF coverage at all, even if you were transferred directly to a nursing facility afterward. It’s worth asking your care team explicitly whether you’ve been formally admitted.

3. Inpatient Rehabilitation Facility (IRF) Care

What It Covers

Intensive, coordinated rehabilitation therapy following serious illness, injury, or surgery that’s provided in a specialized rehabilitation hospital or a dedicated rehabilitation unit within a hospital.

How to Qualify

In order to qualify for inpatient rehabilitation facility care:

• A qualifying 3-day hospital stay must precede the IRF admission
• Therapy must be ordered by a physician
• You must be able to tolerate and participate in intensive therapy lasting at least 3 hours per day

This last requirement is what distinguishes IRF from a skilled nursing facility. SNF therapy is less intensive (often 1 to 2 hours per day, delivered intermittently). IRF therapy is more demanding and is intended for patients who can actively engage in rigorous rehabilitation.

What You Pay

IRF care is billed on the same schedule as inpatient hospital care, and it continues the same benefit period. If you were hospitalized for 30 days before transferring to an IRF, your benefit period and cost-sharing pick up where they left off.

The Catch

The 3-hour-per-day therapy requirement is a real threshold. Patients who aren’t medically stable enough for that level of activity won’t qualify for IRF care, regardless of need. In those cases, a skilled nursing facility is the more likely next step. This level of care is at a lower intensity (and, typically, a lower cost).

4. Home Health Care

What It Covers

Skilled nursing and therapy services provided in your home by a Medicare-approved agency, when leaving home is difficult and skilled care has been certified as medically necessary.

Covered skilled services include:

• Skilled nursing care (RN or LPN): IV therapy, wound care, injections, health monitoring
• Physical therapy (PT)
• Occupational therapy (OT)
• Speech-language pathology

Medicare and Occupational Therapy

Of the therapy services covered under Part A home health, Medicare and occupational therapy coverage often surprises people—both that it exists and what it actually does. While physical therapy focuses on strength, movement, and mobility, occupational therapy focuses on function: the practical ability to perform daily tasks such as dressing, bathing, preparing meals, and moving safely around the home.

For patients recovering from a stroke, injury, or surgery, OT can be the difference between returning home independently and needing ongoing facility care. 

How to Qualify

In order to qualify for home health care:

• You must be considered homebound. Leaving home requires considerable effort and is infrequent (typically only for medical appointments or brief outings).
• A physician must certify that skilled care is needed and establish a care plan.
• Services must be provided by a Medicare-approved home health agency.

What You Pay

Nothing. There is no deductible, copay, or coinsurance for Part-A-covered home health services. Medicare pays 100% as long as you continue to qualify.

The Catch

Coverage stops when you no longer meet the criteria. If your physician determines that skilled care is no longer medically necessary or that you’re no longer homebound, Medicare stops paying. Home health care is intended to be skilled and temporary, not a long-term support system for daily living.

The Blood Deductible

One Part A (and B) cost that often catches people off guard is the “blood deductible.” 

If you need blood during a hospital stay, the first three pints are your responsibility (in addition to the standard Part A deductible and any applicable coinsurance). After those first three pints, Medicare covers any additional blood needed that year.

You have two options for meeting this deductible: paying the cost directly, or arranging for replacement blood to be donated on your behalf. If you go the donation route, be aware that handling and delivery charges may still apply.

A small but useful detail: hospitals measure blood in units rather than pints, but Medicare treats them as equivalent (one unit equals one pint for billing purposes).

The blood deductible applies under both parts of Medicare: Part A when blood is administered during an inpatient hospital stay, and Part B when received in an outpatient setting or physician’s office. In the latter case, the blood deductible applies in addition to the Part B deductible and 20% coinsurance.

How Part A Fits Into the Bigger Picture

Medicare Part A coverage is broad in what it touches: hospitals, nursing facilities, rehab, and home care. However, it can be narrower than many people expect in what it actually pays for within each of those settings. The throughline across all four categories is that Medicare covers skilled, medically necessary care. The moment care shifts to custodial support or daily living assistance, Part A no longer applies.

Understanding these limits now is the best way to avoid being caught off guard when a hospital discharge planner asks where your loved one is going next.

The first post in this series provided an overview of Medicare, including eligibility requirements, costs, and what to expect. The next posts will cover Part B (outpatient services, doctor visits, and preventive care) and Medigap supplemental insurance, followed by Medicare Advantage (Part C), and prescription coverage (Part D).