Health maintenance organizations and their implications for psychiatry.

Rapidly rising health care costs, a growing surplus of physicians, and recent federal legislation have created a more competitive health care market and have led to rapid growth in the number of health maintenance organizations, or HMOs. HMOs may place psychiatrists and their patients at a disadvantage because they generally restrict coverage of mental illness, use mental health practitioners other than psychiatrists, and lack provision for treating chronic and indigent mentally ill patients. In this review article, the authors describe the characteristics of HMOs, review the historical, legislative, and economic forces that have contributed and will contribute to their explosive growth, and outline measures that psychiatrists must take to ensure that mental health care is not compromised in HMOs and other price-competitive health care delivery systems.