Medicare Rehab After Hospital Stay: SNF Coverage Rules and What South Dakota Families Need to Know

Your parent had surgery or a fall, spent several days in the hospital, and now the discharge team says they need rehabilitation at a skilled nursing facility. Medicare covers this — but with strict rules about qualifying days, daily copays, and progress requirements that can cut coverage short without warning.

Understanding these rules before your parent transfers saves families from unexpected bills that can reach $400+ per day.

What Medicare Part A Covers

Medicare Part A pays for skilled nursing facility (SNF) rehabilitation when your parent needs daily skilled care — physical therapy, occupational therapy, speech therapy, or skilled nursing services — following a qualifying hospital stay.

Coverage breakdown:

• Days 1-20: Medicare pays 100%. No copay, no deductible beyond the standard Part A inpatient deductible for the benefit period.
• Days 21-100: Medicare pays a portion, but your parent owes a daily coinsurance amount (in 2026, this is substantial — check the current year's rate at medicare.gov, as it adjusts annually).
• Days 101+: Medicare coverage ends entirely. Your parent pays full private-pay rates or transitions to Medicaid if eligible.

The maximum per benefit period is 100 days. A new benefit period begins only after your parent has been out of a hospital or SNF for 60 consecutive days.

The Three-Day Qualifying Stay

Medicare will not cover SNF rehabilitation unless your parent had three consecutive days as a formal inpatient in a hospital. The discharge day does not count. Days spent under "observation status" do not count either.

The SNF admission must occur within 30 days of the qualifying hospital discharge. Miss this window and Medicare coverage resets regardless of medical need.

If your parent was under observation status for part of the hospital stay, those days contributed nothing toward the three-day requirement. This is the single most common reason families discover their parent's rehab isn't covered — check our guide on observation vs inpatient status for how to prevent this.

When Medicare Stops Paying Early

Coverage doesn't automatically last 100 days. Medicare stops paying the moment your parent is no longer making "measurable functional improvement" or no longer requires skilled-level care. The facility's clinical team makes this determination, and it can happen at any point.

Common triggers for early termination:

• Progress plateau: Your parent's therapy gains level off, even if they haven't fully recovered
• Custodial reclassification: The facility determines your parent's needs are maintenance-level (bathing, dressing, mobility assistance) rather than skilled rehabilitation
• Refusal of therapy: Missing or declining scheduled therapy sessions can trigger a coverage review

When coverage ends, the facility delivers a Notice of Medicare Non-Coverage (NOMNC) at least two days before the termination date.

How to Appeal a Rehabilitation Termination

If you believe your parent still needs and is benefiting from skilled therapy, you can appeal:

Step 1: File with Acentra Health (the BFCC-QIO for South Dakota) by noon on the day the NOMNC says coverage will end. Call 1-888-317-0891.

Step 2: While the appeal is pending, Medicare continues paying. The facility cannot discharge your parent or charge them during the review period.

Step 3: Acentra reviews the clinical record and issues a binding decision, typically within one business day of receiving the facility's documentation.

If the appeal fails, your parent becomes financially liable starting at noon the day after the decision. Having a backup plan — whether that's a Medicaid application, private-pay arrangements, or home care coordination — prevents a gap in care.

South Dakota Facility Considerations

South Dakota's two dominant health systems — Sanford Health and Avera Health — operate most of the state's Medicare-certified SNF rehabilitation beds. In rural and frontier counties, your options may be limited to a single facility within a reasonable distance.

Key questions to ask before transfer:

• Does this facility have a Medicare-certified rehabilitation unit (vs. only long-term care beds)?
• What's their average rehabilitation length of stay for your parent's diagnosis?
• What therapy services are available on-site (PT, OT, speech)?
• If Medicare coverage ends, can your parent transition to Medicaid in the same facility, or will they need to transfer?

That last question matters enormously. Not all SNF beds accept Medicaid. If your parent exhausts Medicare rehab days and needs long-term care, a facility that doesn't accept Medicaid may discharge them — forcing a transfer during a medically vulnerable period.

Planning Beyond Day 20

Days 1-20 are straightforward. The financial pressure starts at day 21 when daily copays begin. For families facing a long rehabilitation (hip fracture recovery often takes 40-60 days), the costs between day 21 and day 100 add up fast.

Start these conversations early:

• Does your parent have supplemental insurance (Medigap) that covers the day 21-100 copay?
• If not, what's the daily rate and projected total cost?
• Should you begin a Long-Term Care Medicaid application now, in case rehabilitation transitions to custodial care?

The South Dakota Hospital Discharge Guide includes a facility comparison scorecard and Medicaid financial checklist designed for exactly this transition — when Medicare rehab is winding down and families need to decide between home care, the HOPE waiver, or long-term facility placement.

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