- Aetna
- Affiliated Health Funds
- American PPO
- AZ Foundation for Medical Care
- Beech Street
- Blue Cross/ Blue Shield
- Corvel
- Evolutions Healthcare Systems
- First Health/ CCN
- Focus Healthcare Management
- Fortified Provider Network
- Galaxy Health Network
- Global Medical Management
- Health Management Network
- Health Network America, Inc./ Triveris
- Independent Medical Systems
- Industrial Solutions Network (ISN)
- Integreated Health Plan
- Interplan Health Group / IHG
- Medicare
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- Multiplan/ BCE
- National ChoiceCare, Inc.
- National Preferred Provider Network
- National Provider Network, Inc.
- Pacificare
- Prime Health Services, Inc.
- Private Healthcare Systems (PHCS)
- Procura Management
- Provider Select, Inc.
- Rockport Healthcare Group, Inc.
- Schaller Anderson Healthcare of AZ
- Southwest Carpenters Trust
- The Reny Company
- Three Rivers Provider Network (TRPN)
- TLC Advantage, LLC
- Union Pacific Railroad
- USA Managed Care Organization
- Workers' Compensation
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