How Medicare Benefit Periods Work and Why They Matter

What a Medicare Benefit Period Is

A benefit period is the time window during which Medicare covers your hospital and skilled nursing care. It starts the day you enter a hospital or skilled nursing facility as an inpatient and ends when you have been out of that facility for 60 consecutive days. The benefit period is not the same as a calendar year — it is tied to your actual hospital stays, and you can have multiple benefit periods in a single year if you are admitted to the hospital more than once.

Medicare Part A (hospital insurance) uses benefit periods to decide how much you pay out of pocket and how many days of care are covered. Each new hospital admission starts a new benefit period, even if your previous one has not ended. Understanding how benefit periods work is important because your costs and coverage change depending on where you are within the period.

Key Takeaways

A benefit period begins when you are admitted to a hospital or skilled nursing facility and ends 60 days after you leave.
You pay a deductible once per benefit period for hospital care, not once per year, so multiple hospital stays in one year means multiple deductibles.
After 60 days in the hospital, you start paying coinsurance instead of a flat deductible, and coverage ends after 90 days unless you use lifetime reserve days.
Skilled nursing facility coverage is limited to 100 days per benefit period, with you paying nothing for days 1–20 and coinsurance for days 21–100.

How Costs Change During a Benefit Period

Your out-of-pocket costs depend on how many days you have spent in the hospital during your current benefit period. For the first 60 days, you pay a single deductible (the amount changes each year) and then Medicare covers the rest. Days 61 through 90 require you to pay a daily coinsurance amount — this is a per-day cost, not a flat fee. If you stay longer than 90 days, you can use lifetime reserve days, which are 60 additional days Medicare will cover during your lifetime, but you pay a higher coinsurance for each of those days.

Once you have used all 90 days plus any lifetime reserve days you choose to use, Medicare stops covering inpatient hospital care until your current benefit period ends. This is why the 60-day clock matters: if you leave the hospital and stay out for 60 consecutive days, your benefit period ends and a new one begins, resetting your coverage and your deductible.

Skilled Nursing Facility Coverage Within a Benefit Period

If you move from a hospital to a skilled nursing facility (such as a nursing home providing rehabilitation), that stay is part of the same benefit period as your hospital stay. Medicare covers up to 100 days of skilled nursing care per benefit period, but only if you were hospitalized for at least three days first. You pay nothing for days 1 through 20, and then you pay a daily coinsurance amount for days 21 through 100.

After 100 days in a skilled nursing facility, Medicare stops covering that stay. The benefit period does not end — it is still running — but your skilled nursing coverage is exhausted. You would need to leave the facility, stay out for 60 consecutive days, and then be readmitted to a hospital to start a new benefit period and reset your skilled nursing coverage.

When One Benefit Period Ends and Another Begins

The 60-day clock is the key. If you are discharged from a hospital or skilled nursing facility and do not return to either one for 60 consecutive days, your benefit period ends. The day after that 60-day window closes, a new benefit period begins — but it does not start until you are actually admitted to a hospital or skilled nursing facility again. You cannot have a benefit period running while you are at home; the period only exists when you are an inpatient.

This means you can have multiple benefit periods in a single calendar year. If you are hospitalized in January, discharged, readmitted in April, and discharged again, you have had two separate benefit periods. Each one had its own deductible, its own 90-day hospital coverage limit, and its own 100-day skilled nursing limit.

The Difference Between Benefit Periods and Calendar Years

Medicare Part B (medical insurance) and Part D (prescription drug coverage) use calendar years, not benefit periods. Your Part B deductible resets on January 1 each year, and your Part D coverage gap and out-of-pocket limits reset on January 1 as well. Part A, however, uses benefit periods tied to hospital stays. This means your Part A costs do not follow the calendar — they follow your hospital admissions.

If you are hospitalized twice in the same calendar year but in different benefit periods, you will owe two Part A deductibles even though both stays happened in the same year. Conversely, if you are hospitalized in late December and again in early January, those two stays might fall in the same benefit period (if you do not stay out for 60 days between them), meaning you would owe only one deductible for both stays.

What Happens if You Reach Your Coverage Limits

If you use all 90 days of hospital coverage in a benefit period and do not want to use your lifetime reserve days, Medicare stops paying for your hospital care. You become responsible for the full cost of the hospital stay. Some people have supplemental insurance (Medigap) that covers these costs, but Medicare itself will not pay. If you use your 60 lifetime reserve days, those are gone permanently — you cannot earn them back, and once they are used, Medicare will not cover any additional hospital days beyond 90 in future benefit periods unless you have other coverage.

For skilled nursing care, the limit is 100 days per benefit period. After that, you pay the full cost unless you have supplemental coverage. Unlike lifetime reserve days, your skilled nursing coverage resets with each new benefit period, so you get another 100 days of potential coverage the next time you are hospitalized and then admitted to a skilled nursing facility.

How to Track Your Benefit Period Status

Medicare sends you an Explanation of Benefits (EOB) after each hospital or skilled nursing stay. This document shows which benefit period you are in, how many days you have used, and what you owe. You can also call Medicare at 1-800-MEDICARE to ask what benefit period you are currently in and how many days you have remaining. If you are still in a hospital or skilled nursing facility, the facility's billing department can tell you where you stand in your benefit period.

Keep track of your discharge date if you think you might be readmitted soon. If you are discharged and then readmitted within 60 days, you are still in the same benefit period and will not owe another deductible. If 60 days pass, a new benefit period begins and you will owe a new deductible when you are readmitted.

Frequently Asked Questions

Do I owe a new deductible every time I go to the hospital?

Only if each hospital stay is in a different benefit period. If you are admitted, discharged, and readmitted within 60 days, you are still in the same benefit period and owe only one deductible. If 60 days pass between discharge and readmission, a new benefit period starts and you owe a new deductible.

What are lifetime reserve days and should I use them?

Lifetime reserve days are 60 additional days of hospital coverage Medicare will pay for during your entire lifetime, but at a higher coinsurance rate than regular hospital days. Once you use them, they are gone forever. Whether to use them depends on your situation and whether you have supplemental insurance. Talk to your doctor and your insurance company before deciding.

If I am in a skilled nursing facility for 100 days, what happens on day 101?

Medicare stops covering your care on day 101. You become responsible for the full cost of the facility unless you have supplemental insurance or Medicaid. Your benefit period is still running, but your skilled nursing coverage is exhausted. You would need to leave the facility, stay out for 60 days, and be readmitted to a hospital to start a new benefit period and get another 100 days of skilled nursing coverage.

Can I have more than one benefit period in a single year?

Yes. Each hospital or skilled nursing admission starts a new benefit period if 60 days have passed since your last discharge. If you are hospitalized twice in the same calendar year with more than 60 days between discharges, you have two benefit periods and owe two deductibles.

How do I know when my current benefit period will end?

Your benefit period ends 60 days after you are discharged from a hospital or skilled nursing facility. If you were discharged on March 15, your benefit period ends on May 14. After that date, if you are admitted to a hospital, a new benefit period begins. Your Medicare EOB or a call to 1-800-MEDICARE can confirm your discharge date and when your current period ends.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.