The short version
- The difference is intensity, not quality. Inpatient rehab is roughly three hours of therapy a day; skilled nursing is closer to one to two; home health is a few visits a week.
- You are rarely choosing freely between all three. Inpatient rehab has to be qualified for, and skilled nursing requires a three-day inpatient hospital stay first.
- Home health requires no hospital stay at all — that rule belongs to skilled nursing, and confusing the two costs people a benefit they already qualify for.
- Cost runs opposite to intensity. Home health is $0 for covered services. Skilled nursing is free for twenty days, then $217 a day in 2026.
The conversation almost always happens the same way. Someone from case management arrives, explains that your mother is medically ready to leave but not ready to go home, and produces a list. Three words get used — rehab, skilled nursing, home health — as though you already know what separates them.
You are being asked to choose between three levels of care under time pressure, with no background, about someone you love. Here is the background — and if you want the process around this conversation rather than the options in it, that is discharge planning.
The three settings, side by side
| Skilled nursing (SNF) | Inpatient rehab (IRF) | Home health | |
|---|---|---|---|
| Where you are | A nursing facility, often the same building as long-term residents | A rehabilitation hospital, or a rehab unit inside a hospital | Your own home |
| Therapy intensity | Generally at least five days a week; moderate daily volume | About three hours a day, five days a week — roughly 15 hours per week | Intermittent visits, typically a few per week |
| Medical oversight | Nursing on site around the clock; provider rounds periodically | Physician available 24 hours; rehabilitation physician supervision; team meets weekly | Your own physician directs the plan; no on-site staff between visits |
| What must be true first | A qualifying inpatient hospital stay of at least three days | You must need and tolerate intensive multidisciplinary therapy, certified by a physician | Homebound, a skilled need, a physician order, and a certified agency. No hospital stay required |
| What you pay | $0 for days 1–20, then $217 per day for days 21–100 | Part A inpatient hospital cost sharing — the deductible is $1,736 per benefit period in 2026 | $0 for covered services; 20% for durable medical equipment |
| Best suited to | Someone who needs daily skilled care but cannot manage three hours of therapy | Stroke, spinal cord injury, major trauma — people who can work hard and will gain from it | Someone safe at home who still needs skilled nursing or therapy |
What actually decides it
Families tend to approach this as a preference — which place seems nicest, which is closest, which had the better tour. In practice the decision turns on a single clinical question: how much therapy can this person tolerate, right now?
Three hours a day is genuinely demanding. For a seventy-nine-year-old four days after a hip fracture, with a low haemoglobin and a night of poor sleep behind them, it may be impossible — and attempting it produces exhaustion and setbacks rather than progress. That person is not being offered a lesser option when skilled nursing is recommended. They are being offered the one that matches what their body can do this week.
The reverse also happens. A fifty-eight-year-old three days after a stroke, alert and motivated, who lands in a skilled nursing facility because a bed was available, is being under-served. That is a case worth pushing back on.
A question worth borrowing
The single most useful question a family can ask is not which of these is best — it is which of these did you consider, and why did you rule the others out?
I have no study behind that, only repetition — but the difference in the answers is consistent. The first question invites a reassuring summary. The second surfaces the actual reasoning, including the parts driven by bed availability and insurance authorisation rather than medicine.
What is the three-hour rule?
The best-known criterion for inpatient rehabilitation is the so-called three-hour rule: roughly three hours of therapy a day, five days a week, or about 15 hours within seven consecutive days.
It is not the absolute gate it is usually described as. CMS has clarified more than once that reviewers shall not make absolute claim denials based solely on a threshold of therapy time not being met, and must instead use clinical judgment about the individual case. Where a medical condition limits participation, an equivalent combination of therapy, nursing, and medical care can substitute.
That matters because the rule gets quoted to families as though it were a turnstile. If someone is close to the threshold and would clearly benefit from intensive rehabilitation, the number alone is not supposed to be the reason they are turned away.
What is genuinely required for an inpatient rehabilitation stay is a physician certification that this level of care is necessary, 24-hour physician availability, and a coordinated multidisciplinary team overseen by a rehabilitation physician that meets at least weekly. That density of medical supervision is the real distinction from a skilled nursing facility — not the therapy hours.
What do people get wrong about home health?
Two things, and both cost people a benefit they qualify for.
You do not need a hospital stay first
The three-day inpatient requirement belongs to skilled nursing facilities. It has never applied to home health. Someone who has been declining at home for months, who has never been admitted to a hospital, can qualify for skilled nursing visits and therapy at home if a physician certifies the need. People go without a benefit they already qualify for because they assume a hospitalisation is the price of entry.
Homebound does not mean bedridden
Medicare's homebound standard is about effort, not confinement. Leaving home has to require considerable effort — assistance, a walker or wheelchair, or special transport. Within that, people can and do leave for medical appointments, religious services, and occasional outings without losing the benefit.
Covered home health services cost nothing. There is no copay and no coinsurance for the skilled care itself; the 20% applies to durable medical equipment. In a system where almost everything has cost sharing, this benefit does not — which is part of why it is so often left unused.
Teaching illustration
Consider two patients on the same hospital floor, both four days after a total knee replacement, both seventy-four.
One lives alone in a two-storey house with the only bathroom upstairs, and cannot yet manage stairs. The other lives with a spouse in a single-storey home and is already walking the hallway with a walker.
Identical surgery, identical age, identical progress — and different correct answers. The first needs a facility; the second is a strong candidate for home health. The deciding variable was never the knee. It was the staircase and the person at home.
This is a constructed scenario rather than a real pair of patients, but the point it illustrates is the one families most often miss: the decision is about the whole situation, not the diagnosis.
What to ask before you decide
- Which settings did you consider, and why were the others ruled out?
- Is this recommendation based on what she needs, or on what has a bed available today?
- How many hours of therapy a day will she actually get?
- What has to be true for her to go home instead, and how far away is that?
- If she improves faster than expected, can she move to a less intensive setting? If she struggles, can she move up?
- Has anyone assessed the home itself — stairs, bathroom, who is there overnight?
That last one gets skipped constantly, and it decides more discharges than any other single factor.
Sources
- Medicare.gov. Skilled nursing facility (SNF) care. Qualifying inpatient stay and benefit-period rules.
- Medicare.gov. Home health services. Eligibility, homebound standard, and cost sharing.
- Centers for Medicare & Medicaid Services. 2026 Medicare Parts A & B Premiums and Deductibles. SNF coinsurance and the Part A inpatient deductible.
- Centers for Medicare & Medicaid Services. Inpatient Rehabilitation Facilities.
- Center for Medicare Advocacy. CMS clarifies the three-hour rule should not preclude covered inpatient rehabilitation care.
- Center for Medicare Advocacy. Rehabilitation hospital services. Coverage criteria for inpatient rehabilitation.