The Medicare Inpatient Rehabilitation Facility Patient Assessment Instrument (IRF-PAI) contains data items that were developed primarily for Medicare’s prospective payment system (PPS) for IRFs. IRF-PAI assessments are performed for all Medicare beneficiaries receiving fee-for-service benefits who are admitted to an IRF-PAI. Two IRF-PAI assessments are collected for each Medicare inpatient rehab facility stay, one at admission and one at discharge. IRF-PAI data items address the physical, cognitive, functional, and psychosocial status of patients. IRF-PAI information includes the following clinical items and case mix adjusters: Patient History, Social Cognition, Functional Status, Bowel/Bladder Management, Diagnoses, Medical Complexities, Pain Status, Oral/Nutrition Status, Functional Prognosis, Safety, and Resources for Discharge.