The list below shows the federal regulations and notices for the Hospital Outpatient Prospective Payment System.
| CMS-1504-P | Proposed Changes to the Hospital Outpatient Prospective Payment System and CY 2011 Payment Rates | 2011 |
| CMS-1414-CN2 | Changes to the Hospital Outpatient PPS and Ambulatory Surgery Center PPS and CY 2010 Payment Rates | 2010 |
| CMS-1504-N | Changes to the Hospital OPPS and ASC PPS for CY 2010 to Reflect the Affordable Care Act | 2010 |
| CMS-1414-CN | Changes to the Hospital Outpatient Prospective Payment System and CY 2010 Payment Rates | 2010 |
| CMS-1414-FC | Final Changes to the Hospital Outpatient Prospective Payment System and CY 2010 Payment Rates | 2010 |
| CMS-1404-FC | Final Changes to the Hospital Outpatient Prospective Payment System and CY 2009 | 2009 |
| CMS-1404-CN | Changes to the Hospital Outpatient Prospective Payment System and CY 2009 Payment Rates | 2009 |
| CMS-1404-P | Proposed Changes to the Hospital Outpatient Prospective Payment System and CY 2009 | 2009 |
| CMS-1392-P | Proposed Changes to the Hospital Outpatient Prospective Payment System and CY 2008 Payment Rates | 2008 |
| CMS-1392-CN | CY 2008 OPPS/ASC Correction Notice | 2008 |