If you or a loved one needs ongoing medical care after a hospital stay, a skilled nursing facility (SNF) may be the next step. Medicare does cover SNF care under certain conditions, but there are important rules and time limits you should understand before assuming the bill is taken care of.
What Is a Skilled Nursing Facility?
A skilled nursing facility is a licensed facility that provides round-the-clock nursing care, rehabilitation therapies, and other medical services. These are not the same as long-term care facilities or assisted living communities. SNFs focus on short-term recovery, typically after surgery, a serious illness, or a hospital stay.
The staff at a SNF includes registered nurses, physical therapists, occupational therapists, and speech-language pathologists. Their goal is to help you recover enough to return home or transition to a lower level of care.
How Medicare Part A Covers SNF Care
Medicare Part A is the portion of Original Medicare that pays for skilled nursing facility stays, but coverage only kicks in when you meet specific requirements:
- You must have had an inpatient hospital stay of at least 3 consecutive days (not counting the discharge day). This is commonly called the 3-day hospital stay rule.
- You must be admitted to a Medicare-certified skilled nursing facility within 30 days of leaving the hospital.
- You must need skilled care on a daily basis, such as IV medications, physical therapy, or wound care.
- The care you receive must be related to the condition treated during your hospital stay.
If any of these conditions are not met, Medicare will not cover the SNF stay, and you could be responsible for the full cost. Be aware that time spent under observation status does not count toward the 3-day requirement.
The 100-Day Benefit Period Breakdown
Medicare Part A provides up to 100 days of coverage per benefit period in a skilled nursing facility. However, the amount you pay out of pocket changes depending on how long you stay:
- Days 1 through 20: Medicare pays the full cost. You owe $0 in coinsurance.
- Days 21 through 100: You pay a daily coinsurance amount, which in 2026 is $214.00 per day. Medicare covers the rest.
- After day 100: Medicare coverage ends entirely. You are responsible for all costs from day 101 onward.
That daily coinsurance for days 21 through 100 can add up fast. Over the full 80-day stretch, you could owe more than $16,000 out of pocket. This is one reason many beneficiaries carry a Medigap (Medicare Supplement) plan, which can cover some or all of that coinsurance.
What Counts as a New Benefit Period?
A benefit period starts the day you are admitted as an inpatient in a hospital or SNF. It ends when you have not received inpatient hospital or skilled nursing care for 60 consecutive days. Once a benefit period ends, a new one begins the next time you are admitted, and the 100-day SNF clock resets. After SNF care ends, you may qualify for home health care to continue your recovery at home.
This means if you are discharged from a SNF and stay out of inpatient care for at least 60 days, you would again qualify for up to 100 days of coverage in a new benefit period, assuming you meet the 3-day hospital stay rule again.
Skilled Care vs. Custodial Care
One of the biggest sources of confusion is the difference between skilled care and custodial care:
- Skilled care requires the expertise of licensed medical professionals. Examples include physical therapy after a hip replacement, intravenous injections, and complex wound management.
- Custodial care involves help with everyday activities like bathing, dressing, eating, and using the bathroom. While essential, this type of care does not require trained medical personnel.
Medicare only covers skilled care. If your doctor determines that you no longer need skilled services and only require custodial assistance, Medicare will stop paying for your SNF stay, even if you have not used all 100 days.
The Observation Stay Trap
Be aware of a common pitfall: observation status. If you are at a hospital but classified as an outpatient under observation rather than formally admitted as an inpatient, those days do not count toward the 3-day hospital stay rule. You could spend several days in a hospital bed and still not qualify for SNF coverage because you were never technically admitted.
Always ask your hospital care team whether you are admitted as an inpatient or placed under observation. The distinction has a direct impact on your SNF benefits.
How Medicare Advantage Plans Handle SNF Care
If you are enrolled in a Medicare Advantage (Part C) plan, your SNF coverage may work differently. Medicare Advantage plans must offer at least the same level of benefits as Original Medicare, but they can structure cost-sharing in their own way.
Some key differences to watch for:
- Network restrictions: Many MA plans require you to use SNFs within their provider network. Going out of network could mean higher costs or no coverage at all.
- Prior authorization: Your plan may require approval before admitting you to a SNF.
- Modified coinsurance: Some plans reduce or eliminate the daily coinsurance for days 21 through 100, while others may charge a flat copay instead.
- The 3-day rule may be waived: Certain Medicare Advantage plans have dropped the 3-day hospital stay requirement, allowing direct admission to a SNF without a preceding hospital stay.
Check your plan's Evidence of Coverage document for the specific rules that apply to you.
Tips for Making the Most of SNF Coverage
- Confirm inpatient status before you leave the hospital. Do not assume you were admitted.
- Choose a Medicare-certified facility. Not all nursing homes participate in Medicare.
- Understand your appeal rights. If Medicare or your MA plan denies coverage, you can file an appeal. Facilities are required to give you written notice before stopping coverage.
- Look into Medigap policies. Plans like Medigap Plan A and Plan C can help cover the coinsurance gap during days 21 through 100.
- Plan ahead for day 101. If you expect a long recovery, explore long-term care insurance or Medicaid eligibility for extended stays.
Final Thoughts
Medicare's skilled nursing facility benefit can be a lifeline during recovery, but it comes with conditions and time limits that catch many people off guard. Understanding the 3-day rule, the coinsurance schedule, and the difference between skilled and custodial care will help you avoid unexpected bills and make informed decisions about post-hospital care.