If you need skilled nursing facility care after a hospital stay, there are a few points to keep in mind:
Before going to a skilled nursing facility, Medicare requires you to stay in the hospital as an inpatient for three consecutive days. Otherwise, Medicare won't cover your skilled care charges.
Sometimes a hospital will put you on observation status before admitting you. This observation period doesn't count toward your three-day inpatient stay. Talk with your doctor to learn whether you've been admitted.
After you meet the three-day inpatient stay requirement, you are covered for up to 100 days each benefit period.