The Centers for Medicare and Medicaid Services recently identified a system’s error when calculating payments for inpatient rehabilitation facility (IRF) providers. To correct this error, a special wage index under the fiscal year 2016 IRF prospective payment system (PPS) will need to be implemented. This system fix will be implemented sometime around October 26, 2015. Providers’ Medicare administrative contractor will mass adjust affected IRF PPS claims with dates of service on or after October 1, 2015. No provider action is required.