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Appendix Update

July 27, 2020

MassHealth has updated Appendix Y of the MassHealth Provider manual. The Appendix lists the Eligibility Verification System (EVS) codes and messages that are displayed when providers access EVS through the Provider Online Service Center (POSC) to verify a member's eligibility and any restrictions on their coverage before providing services to MassHealth members.

To access Appendix Y please go to

If you have any questions, please email the MassHealth Customer Service Center at