After you pay a deductible each benefit period, Original Medicare will cover you in full for days 1 to 60 that you are in a hospital. For days 61-90, you pay a daily coinsurance. Medicare pays for up to 60 additional hospital days in your lifetime with a high daily coinsurance, after you have used up your 90 days of hospital coverage in a benefit period.
After you use up your 60 lifetime reserve days, Medicare will no longer pay for any coverage until you start a new benefit period.
A benefit period begins when you enter a hospital or a skilled nursing facility, and ends when you have been out of the hospital or skilled nursing facility (SNF), or stop receiving Medicare-covered skilled services at the SNF, for at least 60 days in a row.
If you buy any Medicare supplemental insurance policy (Medigap plans A-L) it will pay all your hospital coinsurance plus provide up to 365 additional lifetime reserve days. Plans B-J also pay your full hospital deductible.