• Aetna

• Allnet

• American PPO

• Beechstreet

• Blue Cross & Blue Shield (All Plans)

• Bluelincs (Omni/Utica Park)

• C. L. Frates and Company

• Champ VA

• CompMed

• CoreSource Kansas City

• CORVEL Corporation

• Evolutions Heathcare Systems, Inc.

• First Health Network

• Focus HeathCare Management

• Galaxy Health Network

• Global Medical Management

• HealthChoice

• Health Management Network

• Health Network America (Triveris)

• HealthStar, Inc.

• Health First Ancillary Services

• Humana

• Managed Care Strategies

• Medicare Certified

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• MetraComp - UHC Workers' Comp

• Multiplan

• National Comp Care

• National Preferred Provider Network

• National Provider Network, Inc.

• Pacificare PPO

• Plico

• PPO Oklahoma

• ProAmerica

• Preferred Community Choice

• Prime Health Services

• Private HealthCare Systems (PHCS)

• Protegrity Services Inc.

• Railroad Medicare

• Southwest Medical Provider Network

• Three Rivers Providers

• Tricare Champus

• Union Pacific Railroad Employers Health System

• United Payors & United Providers

• USA Managed Care Organization

• United HealthCare

• WorkCare Oklahoma