CMS-1845-F

This rule (CMS-1845-F) is on public display at the Office of the Federal Register.

The associated file(s) (ZIP) are described below:

• IRF Wage Index Final Rule - These files contain the final urban and rural Core-Based Statistical Area FY 2027 IRF wage index tables.
• IRF Rate Setting Final Rule - This file contains data for each of the 1,178 inpatient rehabilitation facilities used to estimate the policy updates in the final inpatient rehabilitation prospective payment system regulation. The methodology used to update the payment data is described in detail in the final rule.
• Case-Mix Groups, Relative Weights, and Average Length of Stay - Values used in the final rule and the standard deviations from the average lengths of stay.
• Tier Comorbidities – ICD-10-CM - This file contains the list of diagnoses (ICD-10-CM codes) that are used to determine placement in tiers for IRF discharges, effective October 1, 2026. It contains the ICD-10-CM codes, the abbreviated code labels, the appropriate tier, and any RICs for which the ICD-10-CM codes are excluded from the tiers (Updated to reflect ICD-10-CM code label changes for October 1, 2026).
• Tier Comorbidities Changes - This file contains the list of diagnoses (ICD-10-CM codes) that have been added or removed from the tier comorbidities. This file also lists code label changes to diagnoses (For ICD-10-CM coding updates, see 2027 files).
• Presumptive Compliance-3 (ICD-10-CM) - This file contains the list of diagnoses (ICD-10-CM codes) that are used for determining presumptive compliance with the IRF 60 percent rule, effective for discharges beginning on or after October 1, 2026. (There are no ICD-10-CM coding updates to this file for October 1, 2026)
• Impairment Group Codes That Meet Presumptive Compliance Criteria-3 (ICD-10-CM) - This file contains the list of impairment group codes that are used for determining presumptive compliance with the IRF 60 percent rule, effective for discharges beginning on or after October 1, 2026. (This file includes a technical correction to replace obsolete ICD-10-CM code M48.06 with ICD-10-CM codes M48.061 and M48.062. There are no other ICD-10-CM coding updates to this file for October 1, 2026).