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AmeriHealth migrated X12 transactions to the Highmark, Inc. (Highmark) Gateway in 2013. As a result of this transition, trading partners send/receive transactions to/from the Highmark Gateway.

Below is a complete list of communications for trading partners and providers regarding the X12 Gateway transition. You can also visit our Electronic Data Interchange page at www.amerihealth.com/edi to access additional resources regarding the submission of transactions.

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Communications

Date	Title	Audience
11/22/13	Bulletin #25-2013: Medically Unlikely Edits	AmeriHealth PA/DE participating hospitals and ASCs
10/11/13	X12 Gateway Transition: AmeriHealth Administrators Companion Guide Now Available	AmeriHealth Administrators-participating NaviNet X12 Gateway Submitters and Direct Connect Submitters
10/4/13	X12 Gateway Transition: AmeriHealth New Jersey all transactions communication	AmeriHealth New Jersey trading partners: NaviNet X12 Gateway submitters
10/4/13	X12 Gateway Transition: AmeriHealth New Jersey all transactions communication	AmeriHealth New Jersey trading partners: Direct submitters
10/4/13	X12 Gateway Transition: AmeriHealth New Jersey all transactions communication	AmeriHealth New Jersey trading partners: Highmark DataStream submitters
10/2/13	X12 Gateway Transition: AmeriHealth Companion Guides Now Available	AmeriHealth-participating NaviNet X12 Gateway Submitters and Direct Connect Submitters
6/10/13	Important Information about Upcoming System and Process Changes	Providers participating with AmeriHealth New Jersey
6/10/13	Important Information about Upcoming System and Process Changes	Providers participating with AmeriHealth (Pennsylvania and Delaware)
4/29/13	X12 Gateway Transition: Initial Announcement	AmeriHealth, AmeriHealth New Jersey, and AmeriHealth Administrators trading partners: NaviNet X12 Gateway submitters and direct submitters
2/1/13	AmeriHealth Administrators Gateway transition	Providers participating with AmeriHealth Administrators
2/1/13	AmeriHealth Gateway transition	Providers participating with AmeriHealth and AmeriHealth New Jersey