- AARP
- Adventist Risk Management
- Aetna
- American Postal Workers Union (APWU)
- Assurant Health (Beechstreet Network)
- AvMed - Eff 2/3/2010
- Beechstreet Network
- Blue Cross Blue Shield
- BSSI (PHCS Network)
- CBCA
- CBSA
- Care Plus
- Complete Care Network (CCN)
- Cigna Healthcare
- Coventry Health Care
- Definity Health Plan
- Fiserv Health
- Florida Hospital Healthcare Systems
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- FMBC
- FMH Benefit Services
- Fortis Insurance
- Fox Everett Inc
- Golden Rule (UHC)
- Great West (Now Cigna)
- Guardian
- Harrington Benefits
- Healthcare Credit Union Association
- Healthsmart Network
- Hospital Benefits
- Humana
- Humana Gold Plus
- IAC
- Medica (UHC)
- Medicare
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- Medicare Railroad
- Mega Life and Health
- Meritain Health
- Midwest National
- Nat'l Assoc Letter Carriers (NALC)
- Nat'l Employee Benefit Admin (NEBA)
- Oxford Health Plan
- Principal Health Care
- Private Health Care Systems (PHCS)
- Secure Horizons
- Tricare for Life
- Tricare
- Unicare
- United Health Care
- United Medical Resources
- Wells Fargo - TPA
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