On July 25th, 2018 the Centers for Medicare and Medicaid Services (CMS) released its proposed rule for changes to the calendar year (CY) 2019 hospital outpatient prospective payment system (HOPPS). This rule provides for a 60-day comment period ending on September 25, 2018. The finalized changes will appear in the final rule in early November and are effective January 1, 2019.