| AARP | Y | |
| Accordia National- CHIPS/PEIA | Y | |
| Aetna | | |
| Aetna Long Term Care | | |
| AFLAC-Dental | Y | |
| Aftra Health Fund | | |
| Alaska Electrical Health & Welfare Fund | | |
| Altius Health Plan | Y | |
| American Community Mutual | | |
| American General Life & Accident | | |
| American Republic | | |
| AmeriChoice of New Jersey, Inc. | | |
| Amerigroup Corporation | | |
| AmeriHealth Mercy - Keystone Mercy Health Plan | Y | |
| Ameritas Life Insurance Co. | | |
| APWU Health Plan | | |
| Arizona Physicians IPA | Y | |
| Assurant Health | | |
| AultCare | Y | |
| AvMed of Florida | Y | |
| Best Choice HeAlth Plan | Y | |
| Best Life and Health | | |
| Blue Cross Alaska - Premera | Y | |
| Blue Cross Blue Shield Alabama | Y | |
| Blue Cross Blue Shield Arizona | Y | |
| Blue Cross Blue Shield Arkansas | Y | Y |
| Blue Cross Blue Shield Colorado - Wellpoint Anthem | Y | |
| Blue Cross Blue Shield Connecticut - Wellpoint Anthem | Y | |
| Blue Cross Blue Shield Florida | Y | |
| Blue Cross Blue Shield Georgia | Y | |
| Blue Cross Blue Shield Illinois | Y | Y |
| Blue Cross Blue Shield Indiana - Wellpoint Anthem | Y | |
| Blue Cross Blue Shield Kansas | Y | |
| Blue Cross Blue Shield Kansas City | Y | |
| Blue Cross Blue Shield Kentucky - Wellpoint Anthem | Y | |
| Blue Cross Blue Shield Lousiana | Y | |
| Blue Cross Blue Shield Maine - Wellpoint Anthem | Y | |
| Blue Cross Blue Shield Maryland, DC and Northern Virginia- CareFirst | Y | |
| Blue Cross Blue Shield Massachusetts | | |
| Blue Cross Blue Shield Michigan | Y | Y |
| Blue Cross Blue Shield Minnesota | Y | |
| Blue Cross Blue Shield Mississippi | Y | |
| Blue Cross Blue Shield Missouri - Wellpoint Anthem | Y | |
| Blue Cross Blue Shield Nebraska | Y | |
| Blue Cross Blue Shield Nevada - Wellpoint Anthem | Y | |
| Blue Cross Blue Shield New Hampshire - Wellpoint Anthem | Y | |
| Blue Cross Blue Shield New Mexico - THIN | Y | Y |
| Blue Cross Blue Shield New York - Empire | Y | |
| Blue Cross Blue Shield New York - Excellus | Y | |
| Blue Cross Blue Shield North Carolina | Y | Y |
| Blue Cross Blue Shield of Central New York | Y | |
| Blue Cross Blue Shield of West Virginia | Y | Y |
| Blue Cross Blue Shield Ohio - Wellpoint Anthem | Y | |
| Blue Cross Blue Shield Oklahoma | Y | |
| Blue Cross Blue Shield Oregon - Regence | Y | |
| Blue Cross Blue Shield Rochester Area (NY) | Y | |
| Blue Cross Blue Shield South Carolina | Y | |
| Blue Cross Blue Shield Texas - Texas Health Information Network (THIN) | Y | Y |
| Blue Cross Blue Shield Utica-Watertown (NY) | Y | |
| Blue Cross Blue Shield Virginia | Y | |
| Blue Cross Blue Shield Wisconsin | Y | |
| Blue Cross California | Y | |
| Blue Cross Independence | Y | |
| Blue Cross Northeastern Pennsylvania | Y | |
| Blue Cross Pennsylvania - Capital Blue Cross | Y | |
| Blue Cross Washington - Premera | Y | |
| Blue Exchange | Y | |
| Blue Grass Family Health Plan | Y | |
| Blue Shield California | Y | |
| Blue Shield Pennsylvania - Highmark | Y | |
| Blue Shield Washington (Regence) | Y | |
| Bravo Health Inc | Y | |
| Capital District Physicians Health Plans (CDPHP) | Y | |
| Carefirst- Federal Employee Program | Y | |
| Carelink Advantra | Y | |
| Carelink Health Plan | Y | |
| Carelink Medicaid | Y | |
| Carenet | Y | |
| CarePlus Health Plan | Y | |
| CareSource Ohio | Y | |
| Cariten Healthcare | Y | |
| Cariten Senior Health | Y | |
| Central Reserve Insurance Company | Y | |
| CHA Health of KY | Y | |
| CHAMPVA - HAC | Y | |
| Chesapeake National Life Insurance (MEGALIFE) | | |
| Children of Women Vietnam Veterans-VA HAC | Y | |
| Christian Brothers Services | | |
| CIGNA | Y | |
| CIGNA HealthCare | Y | |
| CIGNA HealthCare - HMO | Y | |
| CIGNA HealthCare - PPO | Y | |
| Cimarron Commercial | Y | Y |
| Cincinatti Health - CareSource | Y | |
| Claims Management Services - Wellpoint | Y | |
| Colorado Access | Y | |
| Columbia United Providers - CUP | Y | |
| Columbus Health - CareSource | Y | |
| Community Care of Oklahoma | Y | |
| Community Health Plan of Washington - CHPW | Y | |
