| Ohio Health Choice |
| One Health (Great West) |
| OneBeacon |
| OptiCare |
| Optima Health |
| Optimum Choice |
| Optum |
| OSF |
| Oxford Health Plans |
| P5 Health Plan Solutions |
| Pacific Source Health Plans |
| PacifiCare |
| Paramount Health |
| Park Nicollet HealthSource |
| Partners Healthplan |
| Patient Choice Healthcare |
| PayFlex Systems USA, Inc. |
| Penn Highlands Health Plan |
| Perform Rx |
| PersonalCare |
| PharmaCare |
| Pharmaceutical Technologies |
| PHCS |
| PHP of Northern Indiana |
| Physician Health Services |
| Physicians Health Plan |
| Physicians Plus |
| Piedmont Administrators |
| Piedmont Community HealthCare |
| PlanVista Solutions |
| Powers Consulting Services, LLC |
| PPOM |
| ppoNEXT |
| Practice Partner |
| Pre-Paid Legal Services, Inc. |
| Preferred Care |
| Preferred Health Alliance |
| Preferred Health Systems |
| Preferred One |
| Preferred Plus of Kansas |
| Premera Health Plus |
| Premier Blue |
| Presbyterian Health Plan |
| Prescription Solutions |
| Presidential Life Insurance |
| Presidio |
| Prevea Health Plan |
| Principle Financial Group |
| Priority Health |
| Protective |
| Providence Health Plans |
| Prudential Insurance Company |
| Public Safety EAP |
| QBE Insurance Group |
| QualChoice(Acquired by Anthem Blue Cross and Blue Shield |
| Quality Health Solutions |
| Quest Diagnostics |
| R.E. Moulton |
| REAL Health |
| Reed Group |
| Reliance Standard Life |
| ReliaStar |
| RESTAT |
| Rite Aid Corporation |
| Rocky Mountain |
| Rx America, LLC. |
| Rx Education & Design Organization |
| Rx Solutions |
| SafeGuard Dental / Health |
| Sagamore Health Network |
| Saint Mary's Health Plans |
| Scholarship Management Services |
| Scott and White |
| Secova |
| Security Health Plan of WI |
| Security Mutual Life Insurance |
| Sedgwick CMS |
| SelectHealth |
| Shepell-fgi |
| SHPS, Inc. |
| Sierra Health Services |
| SIMNSA |
| Sioux Valley Health Plans |
| SLG Benefits and Insurance |
| Southeast RE |
| Specialty Disease Management Services, Inc. |
| Spectera |
| SRC |
| St Louis Area Business Health Coalition |
| St. Joseph's Candler |
| St. Paul Travelers |
| Standard Insurance Company |
| Standard Security Life Insurance |
| Starmount Life |
| StayWell Health Management |
| SummaCare |
| Summex |
| Sun Life Financial |
| SunRx |
| Super Vision |
| Superior Vision Services, Inc. |
| SVS Vision |
| SXC |
| Symetra Financial |
| Systemed LLC |
| T Rowe Price |
| T.E.A.M. Employee Assistance |
| The American Worker Plans |
| The Chandler Group Companies |
| The Chickering Group |
| The EPOCH Group |
| The Guardian Life Insurance |
| The Haelan Group |
| The Health Plan - Upper Ohio Valley |
| The Loyola Group |
| The Maxon Company |
| Thomson Medstat |
| Total Health Care |
| Treatment Assistance Card |
| TRI-AD |
| Triple S, Inc. |
| Tufts |
| UCare Minnesota |
| UniCare |
| Unimerica |
| Union Central |
| Union Labor Life Insurance Company |
| Uniprise |
| Unique Software Solutions, Inc |
| United Behavioral Health |
| United Concordia |
| United Medical Resources |
| United Resource Network |
| UnitedHealthcare |
| Unity EAP |
| Unity Health Plans |
| Univera |
| Universal Care |
| Unum |
| UPMC |
| US Bank Institutional Trust & Custody |
| USA Managed Care Org |
| Valley Baptist Health Plans |
| Value Options |
| Vanguard |
| Vantage Health Plan |
| Verifications Inc. |
| Vision Benefit of America |
| Vision Care Direct |
| Vision Service Plan |
| Vista Healthplan |
| VIVA Health Inc |
| VMC Behavioral Healthcare |
| Vytra Health Plans |
| WageWorks |
| Walgreens Health Initiative |
| Watson Wyatt Worldwide |
| WebMD |
| Welborn Health Plans |
| WellCorp |
| WellDyneRx |
| Wellness Corp |
| Wellness Plan |
| Wellness Solutions |
| Wellpath Community Health Plans |
| Wellpoint (Blue Cross of CA) |
| Wellpoint Pharmacy Management |
| Wells Fargo |
| Western Health Advantage |
| Wilson Banwell PROACT Human Solutions |
| WINHealth Partners |
| Winning Habits |
| WorldDoc |
| WPPA |
| WPS Health Insurance |
| Zurich U. S. |
