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Definition of Health maintenance organization
1. Noun. Group insurance that entitles members to services of participating hospitals and clinics and physicians.
Medical Definition of Health maintenance organization
1. A comprehensive prepaid system of health care with emphasis on the prevention and early detection of disease, and continuity of care.HMOs may be nonprofit or profit-making ventures, and along with PPOs and managed care plans have come to define the U.S. Health care scene. HMOs generally offer a package of services; however, the choice of physician is frequently limited to those working within the HMO. (05 Mar 2000)