Medicare Part A pays for a skilled nursing facility stay only if the patient first spent at least three consecutive days as a formally admitted hospital inpatient, not counting the day of discharge. Days spent in the hospital under observation status do not count, even if the patient was in a bed, on a floor, receiving tests and treatment for seventy-two hours.
The requirement comes from section 1861(i) of the Social Security Act. It is one of the oldest rules in the Medicare program and one of the most expensive to be wrong about, because a family that learns about it at the nursing home admissions desk learns about it too late. By then the hospital stay is over and the status cannot easily be changed.
This page is a checklist, in order, of what to verify and when. It is written to be used while the patient is still in the hospital, because that is the only window in which most of it can be fixed. Print it, take it to the hospital, and work down the list. Pine Lake Legacy provides education and a free policy review only; this is not medical, legal or coverage advice.
In This Article
- Check One, Every Single Day: Inpatient Or Observation?
- Check Two: Did You Get The MOON, And What Does It Say?
- Check Three: Ask For A Status Change While Still Admitted
- Check Four: Count The Days Against The Discharge Plan
- Check Five: If It Went Wrong Anyway, What Is Left
- What It Gets Confused With, And What It Costs If It Fails
- Frequently Asked Questions
Check One, Every Single Day: Inpatient Or Observation?
Ask the question out loud, daily, and to a person who can look it up: “Is my mother admitted as an inpatient, or is she under observation?” Ask the hospitalist, the case manager, or the utilization review nurse. Do not ask a floor nurse who may not know, and do not infer it from the room, the wristband, or the fact that she has been there two nights. Observation patients occupy ordinary hospital beds and receive ordinary hospital care.
Write down the date, the answer, and the name of the person who gave it. That log is the single most useful document a family can produce later.
The reason this matters is the arithmetic. The three days must be consecutive medically necessary inpatient days, and the day of discharge does not count. So a patient admitted Monday afternoon and discharged Thursday morning has three qualifying days — Monday, Tuesday and Wednesday. A patient held Monday and Tuesday under observation and converted to inpatient Wednesday has one qualifying day, no matter how the stay felt.
Time spent in the emergency department before any decision generally does not count either. The clock is about status, not about hours in the building.
Check Two: Did You Get The MOON, And What Does It Say?
Federal law requires the notice. Under the Notice of Observation Treatment and Implication for Care Eligibility Act, passed in 2015, hospitals must give a Medicare Outpatient Observation Notice to any patient receiving observation services as an outpatient for more than 24 hours. The form is CMS-10611. It must be delivered no later than 36 hours after observation services begin, and it must be explained orally as well as in writing, with a signature acknowledging receipt.
Ask for it if you have not received it. Read the reason the hospital gives for the observation status; that language is what you will be arguing with later.
Understand what the MOON is and is not. It is a notice, not an appeal form, and signing it does not waive anything. It does not by itself give you a right to appeal the status. What it does is establish, in writing and with a timestamp, that the patient was in observation, which converts a later argument from memory into documentation.
Keep the original. Photograph it with your phone before it disappears into a hospital folder.
Check Three: Ask For A Status Change While Still Admitted
This is the step with the highest payoff and the shortest window, and almost no family knows to take it.
A hospital can change a patient’s status from observation to inpatient while the patient is still in the hospital, when the treating physician and utilization review agree the inpatient criteria are met. Medicare’s billing rules provide a mechanism for hospitals to correct a status determination before discharge; it is administered internally by the utilization review committee. Once the patient has been discharged and the claim submitted, that route generally closes.
So: ask the attending physician to document why inpatient status is medically appropriate, and ask the case manager to refer the question to utilization review. Put the request in writing, keep a copy, and be specific about the reason — the expectation of a stay crossing two midnights and the medical necessity of hospital-level care are the concepts the reviewers use.
If the answer is no, ask for that in writing too. A documented refusal is useful later. And keep asking each day the patient remains, because the clinical picture can change and so can the determination.
| Step | When | Who to ask | What to keep |
|---|---|---|---|
| Confirm inpatient vs observation | Every day of the stay | Hospitalist, case manager, utilization review | A dated log with names |
| Get the MOON, form CMS-10611 | Within 36 hours of observation starting | Case management | The original notice, photographed |
| Request a status change | Before discharge only | Attending physician and utilization review | Your written request and their answer |
| Count qualifying days | Before agreeing to an SNF transfer | Case manager | Admission and discharge dates in writing |
| Force a claim and appeal | After discharge, within notice deadlines | The facility, then SHIP | Medicare Summary Notice and denial |
Check Four: Count The Days Against The Discharge Plan
Before agreeing to a skilled nursing facility transfer, do the arithmetic yourself and confirm it with the case manager.
Count the inpatient days, exclude the discharge day, and confirm you have three. Then confirm the transfer to the facility will occur within 30 days of the hospital discharge, which is the general requirement for the stay to be covered. Then confirm the facility is Medicare-certified; not all are, and a facility can be certified for some beds and not others.
Also confirm what the benefit actually covers if you qualify. Medicare Part A covers up to 100 days per benefit period, with no coinsurance for days 1 through 20 and a substantial daily coinsurance for days 21 through 100. That daily amount is set annually — it was $209.50 per day in 2025 — and the 2026 figure is published by CMS each fall. Confirm the current amount on Medicare.gov or with your State Health Insurance Assistance Program before you plan around it. Many Medigap policies cover that coinsurance; check the plan letter.
Finally: if the patient is enrolled in a Medicare Advantage plan, the three-day rule may not apply at all. Many plans waive it, and some hospitals participate in models that waive it. Call the plan and get the answer in writing before you assume either way.
Check Five: If It Went Wrong Anyway, What Is Left
Two routes remain after discharge, and both are worth the effort.
Appeal a hospital status reclassification. Following litigation that reached the Second Circuit and was affirmed in 2022, Medicare beneficiaries who were initially admitted as inpatients and then reclassified to observation by the hospital gained the right to appeal that reclassification. This does not create appeal rights for someone placed in observation from the start. It is narrow, it is real, and your SHIP counselor or the Medicare Rights Center can tell you whether your situation fits.
Force a formal determination. Ask the skilled nursing facility to submit the claim to Medicare even if it expects a denial, so that a formal determination is issued that you can appeal. Then follow the appeal path described on the Medicare Summary Notice, generally within 120 days of receipt. Facilities sometimes prefer to bill the family directly rather than generate a denial; insist on the claim.
Free help: your State Health Insurance Assistance Program, the Medicare Rights Center helpline, and, for anyone in a facility, the long-term care ombudsman. None of them charge. Use them before paying a private advocate.
Note that a separate coverage question can also be in play: whether the care is skilled at all. That is governed by the Jimmo standard, which removed improvement as a condition of coverage. Read what the Jimmo settlement changed; it is a different argument and it can be run alongside this one.
What It Gets Confused With, And What It Costs If It Fails
The two-midnight rule is the guideline physicians use to decide whether to admit — broadly, an expectation that the patient will need hospital care spanning two midnights supports inpatient admission. It informs the status decision. The three-day rule is about what that decision buys you afterward.
The Medicaid look-back and asset rules are a different program entirely, run by your state, and are unaffected by hospital status.
Long-term care insurance benefit triggers are contractual and generally do not require a hospital stay at all. If a private LTC policy exists, read it now; it may pay where Medicare will not. See how LTC benefit triggers work.
Custodial care is never covered by Medicare regardless of the three-day rule.
The cost of failing the rule is concrete: private-pay skilled nursing runs in the range of roughly $300 to $400 per day for a semi-private room in most markets according to national cost-of-care surveys of the Genworth type in the mid-2020s, with wide variation by state. Thirty days of that is a five-figure bill.
That is the point at which families start looking at assets, and it is worth being deliberate about the order. An in-force life insurance policy is often the largest unexamined asset in the house, and a sale in the secondary market can produce materially more than surrendering it — but it is the wrong move when the face amount is small, when a surviving spouse still needs the death benefit, or when the appeal above has not been run yet. Read how settlement proceeds interact with Medicare Savings Programs before taking a lump sum, since income-tested Medicare assistance can be affected. For a free, no-obligation review of what a policy is worth, send the policy cover page or call (732) 978-9575.
Frequently Asked Questions
Do observation days count toward the three days?
No. Only medically necessary inpatient days count, and the day of discharge is excluded. A patient can spend four nights in a hospital bed receiving treatment and still have zero qualifying days if the entire stay was billed as observation. This is why asking about status daily, and writing down the answer, is the most valuable thing a family can do.
What is the MOON and does signing it hurt me?
The Medicare Outpatient Observation Notice, form CMS-10611, must be given to any patient receiving observation services for more than 24 hours, no later than 36 hours in, with an oral explanation. Signing it acknowledges receipt and waives nothing. It is not an appeal form, but it creates timestamped written proof of the observation status that is useful later.
Can the hospital change my status from observation to inpatient?
It can, while the patient is still in the hospital, if the treating physician and utilization review agree that inpatient criteria are met. Medicare billing rules provide an internal correction mechanism for that. Once the patient is discharged and the claim submitted, the route generally closes. Ask in writing and keep the answer either way.
Does the three-day rule apply to Medicare Advantage plans?
Often not. Many Medicare Advantage plans waive the qualifying inpatient stay requirement, and some hospitals participate in payment models that waive it as well. Do not assume in either direction. Call the plan, ask specifically whether a three-day qualifying stay is required for skilled nursing coverage, and get the answer in writing.
What does Medicare pay once I qualify?
Part A covers up to 100 days per benefit period, with no coinsurance for days 1 through 20 and a daily coinsurance for days 21 through 100. That daily amount is set annually and was $209.50 in 2025; confirm the current figure on Medicare.gov or with your SHIP counselor. Many Medigap policies cover the coinsurance.
Who helps for free if coverage is denied?
Your State Health Insurance Assistance Program provides free one-on-one Medicare counseling in every state. The Medicare Rights Center runs a national helpline, and residents of nursing facilities can use the long-term care ombudsman program. Use these before hiring a private advocate; they handle observation-status denials as routine work.
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Related Reading
- What Is The Jimmo Settlement
- What Is An Ltc Benefit Trigger
- Settlement And Medicare Savings Program
- What Is Medicare Part A Coinsurance
- Irmaa Medicare Premium Impact
- No Ltc Insurance Pay For Care
- What Is A Life Settlement
- How Much Is My Policy Worth
Pine Lake Legacy does not purchase life insurance policies and does not provide legal, tax, or investment advice. Information provided is for educational purposes only. Eligibility for any option, including life settlements, is not guaranteed and depends on individual circumstances, policy terms, underwriting, and market conditions. Consult independent legal, tax, or financial professionals before making decisions regarding a life insurance policy.