Medicare skilled nursing facility coverage is one of the most misunderstood benefits in Original Medicare. Many people assume Medicare pays for any nursing home stay. It does not. Part A covers short-term skilled care after a qualifying hospital stay.
It does not cover long-term custodial care, which is the help most nursing home residents receive. That difference matters a great deal. A family that misreads the rules can face weeks of surprise bills. Medicare skilled nursing benefits also come with strict deadlines, a 100-day cap per benefit period, and cost sharing that starts on day 21. If patients and caregivers know the rules before a hospital discharge, they’re in a much stronger position to push back.
How Medicare Skilled Nursing Coverage Works Under Part A
Skilled nursing facility (SNF) care falls under Medicare Part A, the hospital insurance part of Original Medicare. It covers care that licensed professionals must perform or supervise. Examples include IV antibiotics, complex wound care, injections, and physical, occupational, or speech therapy. You must need this care every day. Therapy alone counts as daily care if you get it at least five days a week.
Covered services go beyond the treatment itself. Part A pays for a semi-private room, meals, skilled nursing, and rehab therapies. It also covers medications, medical supplies, medical social services, and dietary counseling. Ambulance transport is included when any other way of travelling would put your health at risk. A private room is covered only when it is medically necessary.
Coverage is measured in benefit periods, not calendar years. A benefit period starts the day you are admitted to a hospital as an inpatient. It ends after you go 60 days in a row without inpatient hospital or SNF care. Each new benefit period resets your 100 days of SNF coverage. There is no lifetime limit on the number of benefit periods.
Coverage also does not depend on getting better. Under the 2013 Jimmo v. Sebelius settlement, Medicare must cover skilled care you need to maintain your condition or slow a decline. A facility cannot deny coverage just because a patient has stopped improving.
Eligibility Rules and What You Pay
Original Medicare sets five conditions. You must meet all of them before coverage begins.
- You have Part A and have days left in your current benefit period.
- You had a qualifying inpatient hospital stay of at least three days in a row. The day of discharge does not count.
- You enter a Medicare-certified SNF, typically within 30 days of leaving the hospital.
- Your doctor certifies that you need daily skilled care.
- The care is for a condition treated during your hospital stay, or for a condition that started while you were in the SNF being treated for that original condition.
The three-day rule trips up many families. Time spent under observation status does not count, even if you slept in a hospital bed for several nights. Emergency room hours before admission do not count either. Hospitals must give the Medicare Outpatient Observation Notice (MOON) to patients kept in observation for more than 24 hours. As a result, one of the most important questions a patient can ask is “Am I an inpatient or under observation?”
Cost sharing for medicare skilled nursing care follows a set schedule. CMS updates the daily coinsurance every January, and it tends to rise along with hospital costs.
| Days in SNF (per benefit period) | What you pay under Original Medicare |
|---|---|
| Days 1–20 | Nothing for covered services. Medicare pays in full. |
| Days 21–100 | A daily coinsurance amount set each year by CMS |
| Day 101 and beyond | All costs |
Keep in mind that 100 days is a maximum, not a promise. Coverage ends as soon as you no longer need daily skilled care. In practice, many SNF stays end well before day 100. The facility must give you a written Notice of Medicare Non-Coverage at least two days before covered services end.
Medicare Advantage, Medigap, and Other Ways to Fill the Gaps
Medicare Advantage plans must cover everything Original Medicare covers. However, their rules can look different. Many plans from UnitedHealthcare, Humana, Aetna, and Blue Cross affiliates drop the three-day hospital requirement. In return, they typically require prior authorization and limit you to a network of contracted facilities. Daily copays may also differ from Original Medicare’s schedule. Check the plan’s Evidence of Coverage before you choose a facility.
Medigap policies help people who have Original Medicare. Plans C, D, F, G, M, and N cover 100% of the SNF coinsurance for days 21 through 100. Plan K covers 50%, and Plan L covers 75%. Plans A and B do not cover it at all. Mutual of Omaha, Cigna, and AARP/UnitedHealthcare all sell these standardized plans. Premiums vary by state, age, and carrier.
Some Accountable Care Organizations in CMS programs can also waive the three-day rule for their patients. For long-term needs, Medicaid can cover custodial nursing home care for people who meet income and asset limits. For example, someone who finishes a medicare skilled nursing stay but still needs help bathing and dressing may need to turn to Medicaid. Private long-term care insurance is another option, though it usually has to be bought years ahead.
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Steps to Protect Your Coverage Before and After Discharge
Preparation starts in the hospital, not the nursing facility. These steps can prevent costly surprises.
- Confirm your status every day. Ask the attending doctor whether you are formally admitted as an inpatient. Write down the date and time of admission.
- Compare facilities on Medicare.gov. The Care Compare tool shows star ratings for health inspections, staffing, and quality measures. Confirm the facility is Medicare-certified and, if you have Medicare Advantage, in your plan’s network.
- Get the care plan in writing. Ask the SNF which skilled services you will receive and how often. Daily therapy and nursing notes become key evidence if your coverage is questioned.
- Watch for notices. If you get a Notice of Medicare Non-Coverage, read the appeal instructions right away.
- Request a fast appeal. Contact your Beneficiary and Family Centered Care Quality Improvement Organization (BFCC-QIO) by noon of the day before services end. The QIO usually decides within about two days.
Good records are the best way to defend your medicare skilled nursing coverage. Appeals succeed more often than many families expect. For example, a facility may say a patient has “plateaued.” Under the Jimmo standard, that alone is not a valid reason to end coverage if skilled maintenance care is still needed. If you file on time, you generally won’t be billed for care you receive while the QIO reviews your case.
Observation status has its own path for appeals. After the Alexander v. Becerra court case, CMS created an appeal process for certain patients who were switched from inpatient to observation status during their stay. If this happened to you, ask the hospital for your MOON and keep every discharge document.
You can get free, unbiased help. Every state runs a State Health Insurance Assistance Program (SHIP) with trained counselors. Find yours at shiphelp.org or call 1-800-MEDICARE. The Center for Medicare Advocacy also publishes free self-help materials on SNF appeals and observation status.
Frequently Asked Questions
Does Medicare pay for 100 days in a skilled nursing facility?
Not automatically. Medicare skilled nursing coverage lasts up to 100 days per benefit period, but only while you need daily skilled care. In most cases, stays end sooner once therapy goals are met or the care becomes custodial. Days 21 through 100 also have a daily coinsurance unless a Medigap plan covers it.
Does observation status count toward the 3-day hospital stay?
No. Only days as a formally admitted inpatient count, and the discharge day is not included. Some Medicare Advantage plans and ACOs, though, waive the three-day requirement entirely. Always confirm your status with the hospital before you’re discharged.
Can I get skilled nursing coverage again after using all 100 days?
Yes, but only in a new benefit period. First, you must go 60 days in a row without inpatient hospital or SNF care. After that, a new qualifying hospital stay of three or more inpatient days restarts the full 100 days of coverage.
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Official Sources & Resources
For verified information on Medicare regulations and consumer protection:
- Medicare.gov (Official Site): medicare.gov
- CMS (Centers for Medicare & Medicaid Services): cms.gov
- NAIC (National Association of Insurance Commissioners): naic.org
- KFF Medicare Research: kff.org/medicare
- Social Security Administration: ssa.gov
Content last reviewed October 2026. If you notice any outdated information, please contact us.