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 10th, 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 contact: MassHealth Customer Service at 800-841-2900 (toll-free) or by email at Provider@masshealthquestions.com. MassHealth Customer Service hours of operation 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.