Aetna
Allied Benefits 
Anthem
Blue Cross Blue Shield
Community Health Options 
Coresource
Diversified Group Brokerage
First Health Network 
Harvard Pilgrim
Health Plans
Mainecare
Magellan Behavioral Health 
Medicare
Meritain Health
Optum
Patient Advocates 
Tricare East 
​Tufts 
​Ultra Benefits 
United Behavioral Health (UBH)
United Healthcare (UHC)
United Medical Resources (UMR)