- Aetna
 - Provider of managed care benefits and dental, pharmacy, vision, and group insurance coverage. - Allied Network PPO
- Serving Texas, Louisiana, Arkansas and New Mexico.
- America Service Group Inc.
- Provide managed healthcare for inmates in jails and prisons.
- American Healthways
- Provider of diabetes and cardiac disease management services to health plans and hospitals.
- American Lifecare
- Offers regional managed care products and services.
- American Psych Systems (APS)
- Manages behavioural health care services for commercial health plans, large employers, and state Medicaid programmes.
- AmeriChoice
- Business unit of UnitedHealth Group which provides government health care programmes to the public sector.
- Amerigroup Corporation
- Provider of managed health care services for the public sector.
- Care Choices
- Serves as a recognised leader and innovator in coordinated care development and operations. Subsidiary of Trinity Health.
- Centene Corporation
- Provides managed care programmes to individuals and families enrolled in government-assisted health programmes.
- CHD Meridian Healthcare
- Occupational and corporate provider. Includes injury treatment, workers compensation management, and preventive care.
- Concentra Managed Care
- Offering outsource solutions for cost containment and care management for employers and payors in the occupational, workers' compensation, auto, and group healthcare markets.
- CorVel Corporation
- National provider of managed care services for workers¿ compensation, accident and health, and auto insurance markets.
- Coventry Health Care
- Provides a range of managed care products and services and administers self-insured plans for large employer groups.
- Coventry Health Insurance
- Offering a full range of risk and fee-based managed care products and services, including HMO, PPO, POS, Medicare Advantage, Medicaid, and traditional indemnity plans.
- First Choice of the Midwest
- Preferred Provider Organisation (PPO). Provides service to Montana, North Dakota, South Dakota, Wyoming, Colorado, Nebraska, Minnesota, and Iowa
- First Health
- Benefits provider to the group health, workers' compensation, and government markets.
- Fortified Provider Network
- Provides a multi-speciality network of managed care preferred providers including hospitals, ancillary facilities, physicians, and professionals.
- Group Health Incorporated (GHI)
- Group Health Plan, Inc.
- Provides comprehensive health care coverage to employers and union groups in the Missouri and Illinois region through standard HMO and Point of Service health plans.
- Health Management Corporation of America
- Operates open MRI, physical therapy, primary care, and pain management facilities in New York, Florida and Georgia.
- Health Net
- Health Risk Management, Inc.
- Providing health plan management through healthcare and information management products and services.
- HealthCare Value Management, Inc.
- New England preferred provider organisation.
- HealthSCOPE Benefits
- Manages healthcare costs for client companies through customer service, benefits administration, managed care, and informatics services.
- Hill Physicians Medical Group
- Information for group members and providers.
- Holman Group
- Managed mental health care.
- Humana Inc.
- Offers coordinated health insurance coverage and related services through traditional and Internet-based plans to employer groups, government-sponsored plans, and individuals.
- Indiana Health Network (IHN)
- Preferred provider organisation (PPO) that provides coverage plans for the state of Indiana, as well as portions of Kentucky, Ohio, Michigan, and Illinois.
- John Alden Financial Corporation
- Offers group health indemnity, managed indemnity and HMO products, as well as other insurance-related products and services.
- Kaiser Permanente (4)
- Liberty Health@
- Lifemark Corporation
- Develops and administers long term healthcare plans for frail, elderly, and chronically ill individuals.
- M-Care
- Providing managed care services to southeast Michigan.
- Meriter@
- Mid Atlantic Medical Services, Inc.
- The MAMSI family of health care products and services includes managed care and indemnity health, home health, pharmacy, life insurance and other products.
- Molina Healthcare
- Providing care for government-sponsored health insurance programmes.
- MultiPlan
- National managed health care preferred provider organisation.
- National Capital PPO
- New Directions Behavioral Health
- Provides a network of employee assistance programmes and integrated managed behavioural health services.
- OmniCare Health Plan of Michigan
- Oxford Health Plans
- Provides health plans to employers in New York, New Jersey, and Connecticut.
- Pacific Foundation For Medical Care
- A cost effective network of physicians, ancillary providers and hospitals offers our network and UR services to payors such as insurance companies, TPAs, and HMOs.
- PacifiCare Health Systems
- Provider of health insurance products for employer groups and Medicare beneficiaries.
- Partners National Health Plans of North Carolina, Inc.
- Managed care service for the southeastern United States.
- Physicians Health Services (PHS)
- Preferred Health Systems
- A network of health insurance companies and providers.
- Preferred Mental Health Management
- Provides managed behavioural health care and EAP services.
- Preferred Plan
- A national managed care organisation offering PPO, workers' compensation, National Transplant, and other provider networks.
- Sloans Lake Managed Care
- Also makes spiritual counselling and alternative care available.
- Southeast Quality Care, LLC
- Services include reviewing managed care contracts, coordinating alliances and care, risk management, and purchasing of insurance.
- Trigon
- Managed health care company in Virginia.
- Trinity MedCare
- Specialising in the development, operation and marketing of adult and gero-psychiatric inpatient/outpatient programmes for hospitals and health systems.
- United Healthcare (8)
- Offers health care plans and speciality medical services to individuals and employer groups across the United States.
- WellPoint Health Networks
- Managed healthcare company offering a broad range of network-based health insurance plans.
- Wisconsin Physicians Service Insurance Corporation
- Provides health insurance for large groups and individuals in the State of Wisconsin.
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