GEHA or UnitedHealthcare Shared Services
Group and Pension Administrators
Health Net of California
Highmark
Independence
Kaiser Permanente Northern California
Kaiser Permanente Southern California-Commercial
KGA EAP
Lucet EAP
Luminare Health, formerly Trustmark
MagnaCare
Managed Health Network (MHN)
Medica
Meritain
Nippon Life Insurance Company
Optum
Oscar
Oxford Health Plans
Pinnacle Claims Management
Premera
Regence
Sharp Health Plan
Sidecar Health
Sierra Health and Life
Surest, formerly Bind
Sutter EAP
Sutter Health
TRICARE West, TriWest Healthcare Alliance
United Medical Resources (UMR)
UnitedHealthcare (UHC)
UnitedHealthcare Student Resources
UPMC Health Plan
USC PPO / EPO Plan
Ventura County Health Care Plan
WebTPA
Wellmark
Western Growers Insurance
Western Health Advantage