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    OpenPayerToolsPayer Contact DirectoryMass General Brigham Health Plan

    Mass General Brigham Health Plan Contact Directory

    15 contact channels across 4 types (Email, Fax, Mailing Address, Phone) for claims, prior authorization, provider services, and more.

    Last verified Aug 25, 2026 from the payer's published directories.

    Phone

    7 rows

    ContactPurposeLine of BusinessHoursNotesSource
    844-875-5722Behavioral HealthCommercialN/ABehavioral health prior authorization is handled by Optum for GIC plans. - behavioral health prior authorization; delegated vendor OptumView source
    844-451-3520Behavioral HealthCommercialN/ABehavioral health prior authorization is handled by Optum for ASO-Employee Plan. - behavioral health prior authorization; delegated vendor OptumView source
    844-451-3519Behavioral HealthMedicaidN/ABehavioral health prior authorization is handled by Optum for MassHealth/Medicaid plans. - behavioral health prior authorization; delegated vendor OptumView source
    844-451-3518Behavioral HealthCommercialN/ABehavioral health prior authorization is handled by Optum for commercial plans. - behavioral health prior authorization; delegated vendor OptumView source
    855-444-4647Claims Status, Prior Authorization, Provider ServicesAllN/AProviders are instructed to call for urgent prior authorization requests outside regular business hours; provider service phone also appears on the contact page. - Provider Service line; providers are directed to contact Provider Service for claims-related questions | urgent requests outside regular business hours | Provider Service line for Mass General Brigham Health Plan network and non-contracted providersView source
    857-282-9082GeneralAllN/APhone listed in a Massachusetts All Provider Manual appendix entry for Mass General Brigham Health Plan - General plan contact listed with TPL code entryView source
    866-414-5533PharmacyCommercialN/APharmacy customer service is listed as the number for member/provider requests in the handbook excerpt. - pharmacy services / prescription drug review requestView source

    Fax

    3 rows

    ContactPurposeLine of BusinessHoursNotesSource
    617-526-1985GeneralCommercialN/AFax listed for mailed/faxed/emailed requests in the handbook excerpt. - customer service requestsView source
    888-656-6671Prior AuthorizationCommercialN/AStandard Prior Authorization forms for pharmacy requests are submitted to Prime Therapeutics by fax. - pharmacy prior authorization; delegated PBM/PA vendor Prime TherapeuticsView source
    617-586-1700Prior AuthorizationCommercialN/AAuthorization or referral requests to a non-My Care Family network provider require fax submission. - My Care Family; non-network provider authorization or referral requestsView source

    Mailing Addresses

    2 rows

    ContactPurposeLine of BusinessHoursNotesSource
    Mass General Brigham Health Plan, Attn: Correspondence Department, 399 Revolution Drive, Suite 810, Somerville, MA 02145Appeals Disputes, GeneralAllN/AAddress labeled as Correspondence Department; used for claim review submissions and other correspondence in Medicare Advantage and SCO/One Care provider manuals | Address in SCO/One Care Provider Manual specifically labeled Attn: Appeals Department | Mailing address listed for requests in the handbook excerpt. - Claim review submissions / correspondence; includes appeals per SCO/One Care manual (Attn: Appeals Department) | Appeals Department mailing address | mailing address for customer service requestsView source
    Mass General Brigham Health Plan, P.O. Box 323, Glen Burnie, MD 21060Claims SubmissionAllN/AAddress explicitly labeled for NEW CLAIMS ONLY (brand-new paper claims) in ACO Provider Manual; also appears in Medicare Advantage and SCO/One Care manuals as paper claim (new claims) address - Paper claims mailing address for new claimsView source

    Email

    3 rows

    ContactPurposeLine of BusinessHoursNotesSource
    HealthPlanCustomerService-Members@mgb.orgGeneralCommercialN/AEmail listed for mailed/faxed/emailed requests in the handbook excerpt. - customer service requestsView source
    providerservice@allwayshealth.orgProvider ServicesCommercialN/AProvider Service email listed on the contact page. - general provider serviceView source
    HealthPlanPEC@mgb.orgProvider ServicesAllN/AProvider email for questions; referenced in Mass General Brigham ACO Provider ManualView source

    Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

    More from Mass General Brigham Health Plan

    • Mass General Brigham Health Plan prior authorization
    • Mass General Brigham Health Plan coverage criteria
    • All Mass General Brigham Health Plan policy updates

    More from Mass General Brigham Health Plan

    • Mass General Brigham Health Plan prior authorization
    • Mass General Brigham Health Plan coverage criteria
    • All Mass General Brigham Health Plan policy updates

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    Where this data comes from

    Every contact in this directory comes from documents the payers publish themselves, such as provider manuals, quick reference guides, and contact pages, and each payer page shows when its contacts were last verified. You can see all of our data sources and how we process them.

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