| 1199SEIU in Crystal Lake, IL | AMERIGROUP in Crystal Lake, IL |
| APS Healthcare in Crystal Lake, IL | Aetna in Crystal Lake, IL |
| Alliance in Crystal Lake, IL | AmeriHealth in Crystal Lake, IL |
| American Behavioral in Crystal Lake, IL | Beech Street in Crystal Lake, IL |
| Behavioral Health Systems in Crystal Lake, IL | BlueCross and/or BlueShield in Crystal Lake, IL |
| CCN in Crystal Lake, IL | CHIPA/College Health in Crystal Lake, IL |
| Cascade Health in Crystal Lake, IL | Ceridian in Crystal Lake, IL |
| ChoiceCare in Crystal Lake, IL | Cigna in Crystal Lake, IL |
| ComPsych in Crystal Lake, IL | Corphealth in Crystal Lake, IL |
| Coventry in Crystal Lake, IL | First Choice Health in Crystal Lake, IL |
| First Health in Crystal Lake, IL | GHI/Group Health Incorporated in Crystal Lake, IL |
| Great-West in Crystal Lake, IL | Guardian in Crystal Lake, IL |
| HFN in Crystal Lake, IL | HIP/Health Plan of New York in Crystal Lake, IL |
| Harvard Pilgrim Health Care in Crystal Lake, IL | Health Net in Crystal Lake, IL |
| Holman Group in Crystal Lake, IL | Horizon Healthcare in Crystal Lake, IL |
| Humana in Crystal Lake, IL | Integrated Health Plan in Crystal Lake, IL |
| Interplan in Crystal Lake, IL | Kaiser in Crystal Lake, IL |
| LifeWise in Crystal Lake, IL | MAMSI in Crystal Lake, IL |
| MHN/Managed Health Network in Crystal Lake, IL | Magellan Behavioral Health in Crystal Lake, IL |
| MagnaCare in Crystal Lake, IL | Medica in Crystal Lake, IL |
| Medicaid in Crystal Lake, IL | Medical Mutual in Crystal Lake, IL |
| Medicare in Crystal Lake, IL | Multiplan in Crystal Lake, IL |
| NCPPO in Crystal Lake, IL | ODS in Crystal Lake, IL |
| Oxford in Crystal Lake, IL | PHCS/Private Health Care Systems in Crystal Lake, IL |
| PPOM in Crystal Lake, IL | PacifiCare in Crystal Lake, IL |
| PacificSource in Crystal Lake, IL | PreferredOne in Crystal Lake, IL |
| Providence in Crystal Lake, IL | Sloans Lake in Crystal Lake, IL |
| TRICARE in Crystal Lake, IL | TriWest0127 in Crystal Lake, IL |
| Tufts in Crystal Lake, IL | UniCare in Crystal Lake, IL |
| Uniform in Crystal Lake, IL | United in Crystal Lake, IL |
| VMC in Crystal Lake, IL | ValueOptions in Crystal Lake, IL |
| WellPoint in Crystal Lake, IL |