Contact Us

  • Current Medicare Supplement customers

    If you have questions about your plan, please call
    Customer Service
    Washington 800-722-1471  (TTY/TDD: 711) 
    Alaska 800-508-4722 (TTY/TDD: 711)
    Monday through Friday, 5 a.m. to 8 p.m. (Pacific)

    24-Hour NurseLine

    To speak with a registered nurse in the event of a non-emergency or if you are unsure of what to do call:


    We're here to help you understand your options and decide on the plan that's right for you.

    800-752-6663 (TTY/TDD: 711)

    April 1 through September 30, Monday to Friday, 8 a.m. to 8 p.m. (Pacific)
    October 1 to March 31, seven days a week, 8 a.m. to 8 p.m. (Pacific)

    We also have Medicare Supplement options available through Healthcare Authority (HCA).

    Washington State employees in the Public Employees Benefits Board (PEBB) group

    If you are currently a Washington State PEBB employee and turning 65, contact HCA by calling their by toll-free telephone number, 800-200-1004, or by visiting their website:

    Washington State residents who are under 65 and eligible for Medicare due to disability

    State residents under 65 can request an enrollment application by calling Premera Blue Cross as 888-208-6264.

    Mailing Address

    PO Box 327
    Seattle, WA 98111-0327

    7001 220th Street SW
    Mountlake Terrace, WA 98043-2124

    3900 East Sprague Ave., Building 1
    Spokane, WA 99202