Companion Guides are intended for trading partner use in conjunction with the ANSI ASC X12N National Implementation Guide.  The ANSI ASC X12N Implementation Guides can be accessed at  http://www.wpc-edi.com/Insurance_40.asp .  This guide outlines the procedures necessary for engaging in Electronic Data Interchange (EDI) with ACS EDI Gateway, Inc. and specifies data clarification where applicable.

• ANSI ASC X12N 837 Professional Companion Guide Version 1.0
• ANSI ASC X12N 837 Institutional Companion Guide Version 1.0
• ANSI ASC X12N 835 Companion Guide Version 1.0