The list below shows the transmittals that are directed to the ASC provider community, but the list may not include all instructions for which ASC providers are responsible. For a list of all instructions, view the Transmittals web page under Regulations and Guidance.
| 6470 | 06/12/2009 | Reassignment and Ambulatory Surgical Centers | 6470 |
| 3082 | 08/29/2003 | Changes in Payment for Services Furnished in Ambulatory Surgical Centers for Fiscal Year 2004 | MM3082 |
| 3905 | 06/17/2005 | Update of HCPCS Codes and File Names, Descriptions and Instructions for Retrieving the 2005 ASC HCPCS Additions, Deletions and Master Listing | MM3905 |
| 4082 | 10/21/2005 | Update of HCPCS Codes and File Names, Descriptions and Instructions for Retrieving the 2006 ASC HCPCS Deletions, Additions, and Master Listing | MM4082 |
| 5211 | 12/20/2006 | Update of HCPCS Codes and Payments for Ambulatory Surgical Centers (ASCs) and File Names, Descriptions and Instructions for Retrieving the 2007 ASC HCPCS Additions, Deletions and Master Listing | MM5211 |
| 5597 | 06/29/2007 | IOM Pub 100-09, Chapters 3, Provider Inquiries and Chapter 6 - Provider Customer Service Program Updates | MM5597 |
| 5680 | 11/02/2007 | Testing and Implementation of 2008 Ambulatory Surgical Center (ASC) Payment System Changes | MM5680 |
| 5885 | 01/18/2008 | Additional Payable C Drug Codes for January 1, 2008 in ASCs | MM5885 |
| 6052 | 09/26/2008 | Physician Payment Amounts When Physicians Furnish Excluded Procedures in Ambulatory Surgical Centers | MM6052 |
| 6129 | 08/08/2008 | New Requirement for Ordering/Referring Information on Ambulatory Surgical Center (ASC) Claims for Diagnostic Services | MM6129 |