To allow for system maintenance, the MMIS POSC, Provider Portal, HTS transactions, internal MMIS application, EVS and all eligibility services will be unavailable on Sunday, May 24, 2026, from 4:00 PM to 10:00 PM. MAP, CBHI, MeNoB, member and eligibility web services and Netreveal predictive modeling application servers will also be impacted.
We apologize for any inconvenience this may cause. Providers who may have questions should please contact MassHealth Customer Service at 800-841-2900 (toll-free) or by email at provider@masshealthquestions.com. MassHealth Customer Service hours of operations are Monday through Friday from 8am until 5pm EST. EHS users with questions, please contact the EHS Customer Support Center at 617-994-5050 or email eohhs-it-customerservice.hancock@mass.gov.