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Inpatient Rehabilitation Facility PPS


CMG Version 4.00 BETA [ZIP, 2mb] - This new version applies to Federal Fiscal Year (FFY) 2020. It uses the Quality Indicator items, incorporates an unweighted motor score calculation, reflects new case-mix groups, and updates the ICD-10-CM codes used by the CMG grouper. Note that the CMG 4.00 is still in testing – a final release will be issued later in September, and that release will contain test data files.

IRF-PAI Data Specifications Version 4.00.0 (FINAL)  – in effect on October 1, 2019. This FINAL version supports Version 3.0 of the IRF-PAI.  There have been no changes since the DRAFT version.


Section 4421 of the Balanced Budget Act of 1997 (Public Law 105-33), as amended by section 125 of the Medicare, Medicaid, and SCHIP (State Children's Health Insurance Program) Balanced Budget Refinement Act of 1999 (Public Law 106-113), and by section 305 of the Medicare, Medicaid, and SCHIP Benefits Improvement and Protection Act of 2000 (Public Law 106-554), authorizes the implementation of a per discharge prospective payment system (PPS), through section 1886(j) of the Social Security Act, for inpatient rehabilitation hospitals and rehabilitation units - referred to as inpatient rehabilitation facilities (IRFs). The IRF PPS will utilize information from a patient assessment instrument (IRF PAI) to classify patients into distinct groups based on clinical characteristics and expected resource needs. Separate payments are calculated for each group, including the application of case and facility level adjustments.

Hospital Center

For a one-stop resource web page focused on the informational needs and interests of Medicare Fee-for-Service (FFS) hospitals, go to the Hospital Center (see under "Related Links Inside CMS" below).

Section 3004 of the Affordable Care Act 

CMS has created a website to support Section 3004 of the Affordable Care Act, Quality Reporting for Long Term Care Hospitals, Inpatient Rehabilitation Hospitals and Hospice Programs. This site has been created so that  the public can view information, and communications, related to Section 3004. This site is expected to expand as more information is provided. There is also provided a link for emailing comments, questions or ideas to CMS pertaining to Quality Reporting and Section 3004.