By Baltimore Senior Advisor Care Team · October 14, 2026
Medicare Part A covers skilled nursing facility care only after a qualifying inpatient stay of at least three days. Observation nights do not count, even in a regular room. Ask the hospital in writing whether your parent is inpatient or under observation, and ask early.
What is observation status?
Observation is an outpatient status: the hospital is watching a patient to decide whether an inpatient admission is needed. The patient can be in the same bed, on the same floor, getting the same tests as an inpatient. The difference shows up later, on the bill and in what Medicare will cover after discharge.
Hospitals must give Medicare patients who have been under observation for more than 24 hours a written notice explaining the status and its consequences -- the Medicare Outpatient Observation Notice. If you have not seen one, ask.
Why does it matter for rehab in a nursing home?
Medicare Part A pays for skilled nursing facility care only after at least three consecutive inpatient days, counting the admission day but not the discharge day. Days under observation do not count. A parent who spent four nights at a Baltimore hospital but was admitted as an inpatient only for the last two does not meet the rule, and a following rehab stay can be billed privately.
| Scenario | Medicare Part A SNF coverage? |
|---|---|
| 3+ inpatient days, then rehab within 30 days for the same condition | Yes, if daily skilled care is needed |
| 2 observation nights + 1 inpatient day | No (unless a plan waives the rule) |
| 4 observation nights, never admitted | No |
| Medicare Advantage plan member | Depends on the plan; many waive the 3-day rule |
What should you ask the hospital?
- "Is my mother an inpatient or under observation, and since when?" Ask for the answer in writing.
- "If she is under observation, what would make her meet inpatient criteria?"
- "Which skilled nursing facilities have accepted her referral?"
- "If she does not qualify for Medicare SNF coverage, what are the alternatives?"
Hospital case managers at Baltimore's large systems handle these questions daily. Ask on day one, not on the morning of discharge.
What if rehab isn't covered?
Families can pay privately for a short nursing home stay -- CareScout's 2025 Maryland median is $425 a day for a semi-private room -- or arrange home health, which Medicare Part B can cover for a homebound patient, plus private-duty help. For someone who needs supervision more than skilled therapy, a Level 3 assisted living program may be the right next step.
How do you know which status your parent is in?
Ask the nurse or the case manager directly, and ask for written confirmation. The status can change during a stay -- a patient can start under observation and be admitted as an inpatient later, which starts the inpatient day count from the admission order, not from arrival in the emergency department.
Check the hospital's patient portal as well, if your parent uses one; the encounter type is often listed. If you hold health care power of attorney, bring a copy so staff can discuss the status with you.
If your parent is under observation and the care team believes skilled nursing care will be needed after discharge, ask whether the clinical picture meets inpatient criteria. You are not asking anyone to bend rules -- you are asking whether the status reflects the care being delivered.
What does home look like if rehab isn't an option?
For a parent going home after observation, Medicare Part B can cover intermittent home health -- nursing visits and physical or occupational therapy -- for a homebound patient with a physician's order. It does not cover a caregiver who stays for hours.
Families often fill the gap with private-duty aides at the Maryland median of $35 an hour, adult medical day care, or a short respite stay in an assisted living program while strength returns. Maryland Access Point can explain which Medicaid programs might help if the need becomes long-term.
Whatever the plan, ask the hospital to arrange the home health referral before discharge so the first visit happens within a day or two.
What about Medicare Advantage plans in Maryland?
Many Marylanders are enrolled in Medicare Advantage plans, which follow their own rules for skilled nursing coverage. Many waive the three-day inpatient requirement but require prior authorization and use a network of contracted facilities. That changes the discharge conversation: the question becomes whether the plan will authorize the stay and which in-network facilities have accepted the referral.
Ask the hospital case manager to check authorization early, and ask the plan for a list of in-network skilled nursing facilities near the family. If the plan denies authorization, ask about the appeal process before discharge -- timelines are short.
Traditional Medicare does not have a network, so any certified facility that accepts the patient can be used, subject to the three-day rule.
How do you pick a rehab facility fast?
Sort the accepted-referral list by the CMS short-stay quality rating and health-inspection rating in our nursing home directory, then call the top two and ask about therapy hours and weekend coverage.
Frequently asked questions
Do observation days count toward Medicare's three-day rule?
No. Only inpatient days count toward the three-day qualifying stay for skilled nursing coverage.
What is the MOON notice?
The Medicare Outpatient Observation Notice hospitals must give patients under observation for more than 24 hours.
Does Medicare Advantage use the three-day rule?
Many Medicare Advantage plans waive it; check the specific plan.
Can I appeal observation status?
Medicare has appeal rights for certain observation stays; ask the hospital and your plan how they apply.
Does observation status affect hospital bills?
Yes. Observation is billed as outpatient care under Medicare Part B, so copayments differ from an inpatient stay, and self-administered drugs may not be covered.
Who decides whether a patient is inpatient or observation?
The admitting physician makes the decision using Medicare's criteria and the hospital's review process; families can ask the physician and case manager to explain it.
