Definition. Observation status means you're in a hospital bed but classified as an outpatient, billed under Part B, rather than admitted as an inpatient under Part A. It changes what you pay and whether Medicare covers skilled nursing facility care after you leave.
What it means
Your doctor decides whether to admit you. Until there's a formal inpatient admission order, you're an outpatient, even overnight. The difference matters:
- Inpatient (Part A): you pay the Part A deductible ($1,736 per benefit period in 2026), which covers hospital services for the first 60 days.
- Observation (Part B): you generally pay a copayment for each outpatient hospital service and 20% of the Medicare-approved amount for doctor services after the Part B deductible. Drugs you'd normally take yourself, such as daily pills, usually aren't covered as an outpatient.
- Skilled nursing care afterward: Original Medicare covers it only after a qualifying inpatient stay of at least three days in a row. Observation days don't count.
If you're under observation for more than 24 hours, the hospital must give you the Medicare Outpatient Observation Notice (MOON). Read it, and if you may need skilled nursing care, ask your doctor whether you meet the criteria for inpatient admission. Medicare Advantage plans set their own rules for hospital stays and skilled nursing care; check your plan's Evidence of Coverage.
In Oregon
For questions about a hospital discharge or a status change, Oregon's Medicare quality improvement organization (BFCC-QIO) is Acentra Health, at 1-888-305-6759 (TTY 1-855-843-4776). You can also call 1-800-MEDICARE (1-800-633-4227, TTY 1-877-486-2048). See the Medicare appeals guide for Oregon.
Sources
- Medicare.gov — Are you a hospital inpatient or outpatient? (PDF)
- Medicare.gov — Appealing a denial of Part A coverage from a change in status during a hospital stay
- CMS — Hospital appeals: change of inpatient status (Alexander v. Azar)
Frequently asked questions
Can I appeal observation status?
Since 2025, yes in some cases. If you have Original Medicare and the hospital changed you from inpatient to outpatient observation, you may be able to appeal if you don't have Part B or your stay lasted at least three days. The hospital should give you a Medicare Change of Status Notice; ask about a fast appeal before you leave.
Do observation days count toward the three-day stay for skilled nursing care?
No. Original Medicare covers skilled nursing facility care only after at least three days in a row as an admitted inpatient. Days in observation, and the day you're discharged, don't count.
What is the MOON notice?
The Medicare Outpatient Observation Notice. If you get observation services for more than 24 hours, the hospital must give it to you no later than 36 hours after observation starts. It explains that you're an outpatient and how that affects what you pay.
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