Inpatient Rehabilitation Facility (IRF)

Both settings provide post-acute rehabilitation, but the intensity and oversight differ sharply. IRF patients must be able to tolerate an intensive therapy program, commonly benchmarked as three hours of therapy per day at least five days a week, and must require face-to-face physician visits from a rehabilitation physician multiple times per week. SNF rehab is lower intensity with less frequent physician involvement. IRFs are paid under their own prospective payment system using case-mix groups built from the IRF Patient Assessment Instrument (IRF-PAI), and they must satisfy the "60 percent rule": at least 60 percent of their patients must have one of a defined list of qualifying conditions such as stroke, spinal cord injury, brain injury, and hip fracture. That compliance threshold shapes which patients IRFs can accept.

IRF patients follow a fairly predictable arc: acute hospital, two to three weeks of intensive inpatient rehab, then discharge home with continued needs. Most IRF discharges go to the community, and a large share carry home health orders for continued physical therapy, occupational therapy, speech-language pathology, and nursing. These patients arrive with detailed functional documentation from the IRF-PAI and therapy notes, clear goals, and engaged families. Under the Patient-Driven Groupings Model (PDGM), an admission within 14 days of IRF discharge is an institutional admission source, and these patients often group into neuro rehab or musculoskeletal clinical groupings with meaningful functional impairment levels. They are, bluntly, among the most clinically and financially attractive referrals an agency can earn.

IRF discharge planners select home health partners on therapy capability, speed, and outcomes. What wins the referral:

• Demonstrated therapy staffing depth, including neuro-experienced PTs and OTs and SLP availability
• Start of care within 24 to 48 hours of discharge, since deconditioning after intensive rehab is fast
• Willingness to accept complex patients: tracheostomies, dysphagia, cognitive deficits
• Clean communication loops back to the physiatrist, who often continues to follow the patient
• Outcome data on functional improvement and hospitalization rates

Agencies should also mirror the IRF's momentum: front-load therapy visits so the patient does not sit idle for a week after weeks of daily rehab.

The biggest failure mode is treating an IRF discharge like a routine referral. A patient who just finished 15 hours of therapy per week and then waits five days for a home health evaluation loses ground and the family notices. Other traps: under-calling the functional impairment on OASIS because the patient "looks good" relative to typical home health admissions, missing the institutional admission source because the intake team did not capture the IRF stay dates, and building a nursing-led plan of care when the driving need is therapy. Finally, homebound status deserves careful documentation; these patients are often improving quickly, and the record must show the taxing effort required to leave home at the point of admission.