This is the gate that determines whether Medicare covers your SNF stay at all — and most families don't know the rules until it's too late.
What qualifies
Medicare requires a formal inpatient admission of at least 3 consecutive midnights. The clock starts only after a physician officially orders inpatient status.
The observation trap
"Observation status" looks identical — same room, same nurses — but it's classified as outpatient. It does NOT count toward the 3-night Medicare requirement.
Why it matters
Without the qualifying stay, Medicare pays nothing for SNF care. A $300+/day bill becomes entirely out-of-pocket, often without any warning to the family.
Who to ask
Ask the hospital case manager: "Is my loved one formally admitted as an inpatient, or under observation status?" Get the answer in writing.
Watch out
Hospitals often place patients under observation status to reduce Medicare readmission penalties — and families may not be told. If it's day 2 or 3 and no one has mentioned "inpatient admission," ask directly and immediately. Every hour can matter for coverage eligibility.