Inpatient Rehabilitation Facility (IRF)
A hospital or hospital unit specializing in intensive rehabilitation for patients recovering from stroke, joint replacement, spinal cord injury, and other conditions, paid under its own prospective payment system.
On hospital cost-and-quality pages, Inpatient Rehabilitation Facility (IRF) carries a specific technical meaning that often differs from how the term is used in clinical practice or general medical writing. The definition here is the CMS-file usage. On the LakeQuality value rubric, Inpatient Rehabilitation Facility (IRF) is one of the inputs (directly or indirectly) to the combined cost-and-quality grade. Understanding how the term is computed at CMS — what counts and what does not — is part of reading hospital pages defensibly.
Each hospital page on LakeQuality surfaces the specific Inpatient Rehabilitation Facility (IRF) value for that facility (when CMS reports one), so the general definition here translates into a concrete data point on the per-hospital pages you actually use.
How It Works
Inpatient Rehabilitation Facilities (IRFs) are either freestanding rehabilitation hospitals or dedicated rehabilitation units within general acute-care hospitals. They provide intensive, interdisciplinary rehabilitation for patients who need hospital-level care while recovering from strokes, major orthopedic procedures (particularly hip and knee replacements with complications), traumatic brain injury, spinal cord injury, amputations, and neurological disorders. To qualify as an IRF under Medicare rules, a facility must meet the "60% rule": at least 60% of admissions must fall into 13 qualifying conditions (stroke, spinal cord injury, congenital deformity, amputation, major multiple trauma, femur fracture, brain injury, neurological disorders, burns, certain arthritis conditions, joint replacement with complications or bilateral, systemic vasculidities, severe osteoarthritis). Patients must also be able to tolerate 3 hours of therapy per day 5 days per week (or 15 hours over 7 days). There are approximately 1,180 IRFs in the U.S.; about 85% are hospital-based units and 15% are freestanding. The largest freestanding chain is Encompass Health with 161 hospitals, followed by Select Medical (Baylor Scott & White joint ventures), and HealthSouth (now part of Encompass). IRFs are paid under the IRF Prospective Payment System (IRF-PPS) using Case-Mix Groups (CMGs) rather than DRGs, with approximately 95 CMGs organized by Rehabilitation Impairment Category (RIC). Payments adjust for age, motor and cognitive function at admission, and comorbidity tier. Typical IRF per-discharge payments range from $15,000 for simpler joint replacement rehabilitation to $40,000+ for complex stroke or spinal cord injury cases. Average length of stay runs 12-14 days. CMS enforces the 60% rule and patient selection criteria strictly; RACs and OIG have recovered hundreds of millions of dollars from IRFs that failed to properly document patient eligibility or therapy delivery.
Related Terms
- Long-Term Acute Care Hospital (LTACH), A specialized acute-care hospital treating medically complex patients requiring hospital-level care for more than 25 days on average, paid under its own prospective payment system separate from IPPS.
- Critical Access Hospital (CAH), A small, rural hospital (25 beds or fewer) designated by CMS to receive cost-based reimbursement at 101% of reasonable costs, ensuring rural communities maintain access to essential hospital services.
- Inpatient Prospective Payment System (IPPS), Medicare's payment system for acute-care hospital inpatient stays, paying a fixed amount per MS-DRG rather than reimbursing each individual service.
- Observation Status, A Medicare outpatient classification for short hospital stays where patients receive monitoring and treatment without being formally admitted as inpatients, billed under Medicare Part B rather than Part A.
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About This Definition
This definition is part of the HospitalCostData Hospital Pricing Glossary, 47 terms explaining hospital costs, quality ratings, and healthcare billing. Written for patients, journalists, researchers, and healthcare professionals.