What Original Medicare Covers (and Doesn't Cover) at the Hospital

A hospital stay is one of the most significant healthcare events Medicare beneficiaries face. Understanding what Original Medicare covers in this setting helps you anticipate costs and coverage gaps.

Medicare Part A Inpatient Coverage. Medicare Part A covers inpatient hospital care, including semi-private rooms, meals, general nursing, and medically necessary services. Coverage applies after you're formally admitted as an inpatient—an important distinction from outpatient observation status.

Inpatient vs. Observation Status. Patients who spend time in the hospital under "observation status" are considered outpatients, not inpatients. This distinction significantly affects cost-sharing and, critically, eligibility for subsequent skilled nursing facility coverage. Patients can be in a hospital bed for days while still classified as outpatient.

Part A Cost-Sharing. Original Medicare Part A has a per-benefit-period deductible rather than an annual deductible. After meeting the deductible, you have no daily copay for the first 60 days of inpatient care. Days 61-90 have a daily coinsurance amount, and beyond 90 days you use lifetime reserve days with a higher daily coinsurance.

What Part A Doesn't Cover. Part A doesn't cover physician fees during a hospital stay—those are billed separately under Part B. Private rooms (unless medically necessary), personal items like televisions and phones, and private-duty nursing are not covered.

The Coverage Gap Risk. Original Medicare has no out-of-pocket maximum for hospital care. A very long inpatient stay can result in significant cost-sharing once deductibles and daily copays accumulate. Medigap policies and Medicare Advantage plans address this gap differently.