Contact Information for Medicare Advantage

  • Customer Service

    Call customer service at 888-850-8526.

    April 1 through September 30: 8 a.m. to 8 p.m. PT, Monday through Friday. 
    October 1 through March 31: 8 a.m. to 8 p.m. PT, Monday through Sunday.

    For help with: 

    • General information
    • Member benefits verification
    • Member eligibility confirmation
    • Claims payment, payment vouchers or remittance assistance
    • Medical, payment, and pharmacy policy questions
    • Provider network status confirmation
    • Drug lists questions
    • Part D prescription pre-approval and exceptions requests

    Provider Relations

    You can reach us at 877-342-5258, option 4 or email us with questions about the following items. 

    • Billing, practice or remittance address changes
    • Practice location additions
    • Tax identification number updates
    • Adding/deleting a provider at your office
    • Application and contract requests
    • Copies of past communications

    Behavioral Health Provider Network

    To join this network, call Christine Rae at 206-926-0224 or email christine.rae@optum.com.
    For general questions, call Optum at 800-711-4577.

    Utilization Management

    Call 855-339-8127, from 8 a.m. to 5 p.m. PT, Monday through Friday
    Urgent (after-hours and holidays), call 866-322-6287
    Fax (24-hour) at 866-809-1370

    Technical issues

    For technical issues related to Medicare Advantage secure pages and online tools, call 888-850-8526.

    Credentialing

    Visit our Join Our Network web page for provider credentialing and recredentialing information.