Gemma Ko , MD

Female Internal Medicine

Health Plans

  • Aetna

    Plan Type: Commercial

    Member Services: 1-800-756-7039

    Region Code
    Select 1 350759
    Downey 3 486328
    Whitter 4 832016

  • AHMC

    Plan Type: Commercial

    Member Services: 1-626-300-2841

    Region Code
    Select 1 NAPP-1184633620-PCP

  • Alignment Health Plan

    Plan Type: Medicare Advantage

    Member Services: 1-866-634-2247

    Region Code
    Select 1 ACSA100252

  • Anthem Blue Cross

    Plan Type: Commercial, Medi-Cal, Medicare Advantage

    Member Services: 1-800-627-8797

    Region Code
    Select 1 1CN202

  • Blue Shield

    Plan Type: Commercial

    Member Services: 1-800-393-6130

    Region Code
    Select 1 100103282006
    Downey 3 100103282005
    Whitter 4 100103282007

  • Blue Shield 65+

    Plan Type: Medicare Advantage

    Member Services: 1-800-776-4466

    Region Code
    Select 1 100103282006
    Downey 3 100103282005
    Whitter 4 100103282007

  • Blue Shield 65+ Choice

    Plan Type: Medicare Advantage

    Member Services: 1-800-776-4466

    Region Code
    Select 1 100103282006
    Downey 3 100103282005
    Whitter 4 100103282007

  • Blue Shield Promise Health Plan

    Plan Type: Cal MediConnect

    Member Services: 1-800-544-0088

  • Cigna

    Plan Type: Commercial

    Member Services: 1-800-244-6224

    Region Code
    Select 1 3812977015
    Downey 3 3812977014
    Whitter 4 3812977016

  • Health Net

    Plan Type: Cal MediConnect, Commercial, Medicare Advantage

    Member Services: 1-800-522-0088

    Region Code
    Select 1 3200024630
    Downey 3 3027024630
    Whitter 4 3199024630

  • Health Net Salud HMO y Mas

    Plan Type: Commercial

    Member Services: 1-800-522-0088

  • Humana

    Plan Type: Medicare Advantage

    Member Services: 1-800-457-4708

    Region Code
    Select 1 992282
    Downey 3 992281
    Whitter 4 992283

  • LA Care Health Plan

    Plan Type: Cal MediConnect, Exchange

    Member Services: 1-888-452-2273

    Region Code
    Select 1 G70866W6

  • SCAN

    Plan Type: Medicare Advantage

    Member Services: 1-800-559-3500

    Region Code
    Select 1 0795-22139

  • UnitedHealthcare

    Plan Type: Commercial, Medicare Advantage

    Member Services: 1-866-633-2446

    Region Code
    Select 1 0253270302
    Downey 3 0159670415
    Whitter 4 0217360188

  • WellCare

    Plan Type: Medicare Advantage

    Member Services: 1-866-999-3945

    Region Code
    Select 1 ACLA3211397261
    Downey 3 ACD3201397261
    Whitter 4 ACW3241397261
  • 1 Select Region – Select region is a catch all for the rest of Los Angeles County and all Orange County areas. We recommend these IDs for Members who live outside of the Downey, St Francis, or Whittier region areas.
  • 2 St. Francis Region – A provider network built around our partner hospital, St Francis Medical Center, for better care coordination to members living in Lynwood and the surrounding cities.
  • 3 Downey Region – A provider network built around our partner hospital, PIH Health – Downey, for better care coordination to members living in Downey and the surrounding cities.
  • 4 Whittier Region – A provider network built around our partner hospital, Whittier Hospital Medical Center, for better care coordination to members living in Whittier and the surrounding cities.
Additional languages spoken: Korean
School: University of Hawaii John A. Burns School of Medicine
Internship: University of Hawaii Integrated Medical Residency
Residency: University of Hawaii Integrated Medical Residency

Call to make an appointment

1-562-692-3388

Call Optum Care Network member services

1-800-460-5051, TTY 711
Monday – Friday, 8:00 am to 5:00 pm

  • 1 Select Region – Select region is a catch all for the rest of Los Angeles County and all Orange County areas. We recommend these IDs for Members who live outside of the Downey, St Francis, or Whittier region areas.
  • 2 St. Francis Region – A provider network built around our partner hospital, St Francis Medical Center, for better care coordination to members living in Lynwood and the surrounding cities.
  • 3 Downey Region – A provider network built around our partner hospital, PIH Health – Downey, for better care coordination to members living in Downey and the surrounding cities.
  • 4 Whittier Region – A provider network built around our partner hospital, Whittier Hospital Medical Center, for better care coordination to members living in Whittier and the surrounding cities.
  • 4511 Rosemead Blvd Pico Rivera, CA 90660, Get Directions
    Phone: 1-562-692-3388
    MON: 9:00AM - 5:00PM
    TUE: 9:00AM - 5:00PM
    WED: 9:00AM - 5:00PM
    THU: 9:00AM - 5:00PM
    FRI: 9:00AM - 5:00PM
Additional languages spoken: Korean
School: University of Hawaii John A. Burns School of Medicine
Internship: University of Hawaii Integrated Medical Residency
Residency: University of Hawaii Integrated Medical Residency

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