Most people never need to worry about running out of Medicare hospital coverage. But for those facing a serious illness, cancer treatment, or major surgery with complications, understanding the limits of Medicare Part A hospital coverage, and how Medigap extends it, can be critically important.
How Medicare Part A Hospital Coverage Works
Medicare Part A covers inpatient hospital stays within what are called benefit periods. A benefit period begins the day you are admitted as an inpatient and ends after you have been out of the hospital (or skilled nursing facility) for 60 consecutive days. There is no limit to the number of benefit periods you can have, but within each benefit period, coverage has day-based limits.
| Hospital Days | What You Pay |
|---|---|
Days 1-60 | $0 per day (after the $1,736 Part A deductible per benefit period) |
Days 61-90 | $434 per day coinsurance |
Days 91-150 (lifetime reserve days) | $868 per day coinsurance |
Beyond 150 days | 100% of all costs |
What Are Lifetime Reserve Days?
Lifetime reserve days are a pool of 60 additional inpatient days that Medicare provides over your entire lifetime, not per benefit period. Once you have used all 90 days in a benefit period, you can draw from these 60 lifetime reserve days. But once those 60 days are used up, they are gone permanently. After that, if you are still hospitalized in the same benefit period, Medicare pays nothing.
Lifetime Reserve Days Are Used Once and Gone
Unlike the 90 days per benefit period, which reset after a 60-day gap in care, lifetime reserve days do not reset. You have exactly 60 of them for your entire life. If you use them all during one extended illness, they are not available for future hospitalizations.
How Medigap Adds 365 Extra Hospital Days
Most Medicare Supplement (Medigap) plans include a benefit called hospital coinsurance and coverage for an additional 365 days after Medicare benefits are exhausted. This means that after you have used all 90 days in a benefit period and all 60 lifetime reserve days, your Medigap plan will continue to pay for up to 365 more days of inpatient hospital care at no cost to you.
| Plan | Includes 365 Extra Hospital Days? |
|---|---|
Plan A | Yes |
Plan B | Yes |
Plan C | Yes |
Plan D | Yes |
Plan F | Yes |
Plan G | Yes |
Plan K | Yes (50%) |
Plan L | Yes (75%) |
Plan M | Yes |
Plan N | Yes |
Why This Benefit Matters
For most beneficiaries, the 365-day extension is a rarely-used safety net. But for those dealing with cancer, major organ failure, or other serious conditions requiring prolonged hospitalization, it can prevent catastrophic out-of-pocket costs. Without Medigap, a 200-day hospital stay in a single benefit period could cost over $100,000 out of pocket after Medicare stops paying.
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