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MMIS System Outage Notice - Sunday, September 17, 2023

September 12, 2023

To allow for system maintenance, the MMIS POSC, the internal MMIS application, EVS and all eligibility services will be unavailable on Sunday, September 17, 2023, from 6:00 PM to 10:00 PM. MAP, CBHI, MeNoB, member and eligibility web services, connect direct and interchange file transfers and Netreveal predictive modeling application servers will also be impacted.  

We apologize for any inconvenience this may cause. Providers who have questions should contact MassHealth Customer Service at 800-841-2900 (toll-free) or by email at  EHS users with questions, please contact the EHS Customer Support Center at 617-994-5050 or email