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HMOs : ウィキペディア英語版
Health maintenance organization

In the United States a health maintenance organization (HMO) is an organization that provides or arranges managed care for health insurance, self-funded health care benefit plans, individuals, and other entities in the United States and acts as a liaison with health care providers (hospitals, doctors, etc.) on a prepaid basis. The Health Maintenance Organization Act of 1973 required employers with 25 or more employees to offer federally certified HMO options if the employer offers traditional healthcare options.〔Joseph L. Dorsey, "The Health Maintenance Organization Act of 1973(P.L. 93-222)and Prepaid Group Practice Plan," Medical Care, Vol. 13, No. 1, (Jan., 1975), pp. 1–9〕 Unlike traditional indemnity insurance, an HMO covers care rendered by those doctors and other professionals who have agreed by contract to treat patients in accordance with the HMO's guidelines and restrictions in exchange for a steady stream of customers. HMOs cover emergency care regardless of the health care provider's contracted status.
== Operation ==
HMOs often require members to select a primary care physician (PCP), a doctor who acts as a "gatekeeper" to direct access to medical services but this is not always the case. PCPs are usually internists, pediatricians, family doctors, or general practitioners (GPs). Except in medical emergency situations, patients need a referral from the PCP in order to see a specialist or other doctor, and the gatekeeper cannot authorize that referral unless the HMO guidelines deem it necessary.
"Open access" and "POS" (point of service) products are a combination of an HMO and traditional indemnity plan. The member(s) are not required to use a gatekeeper or obtain a referral before seeing a specialist. In that case, the traditional benefits are applicable. If the member uses a gatekeeper, the HMO benefits are applied. However, the beneficiary cost sharing (e.g., co-payment or coinsurance) may be higher for specialist care.〔Peter R. Kongstvedt, "The Managed Health Care Handbook," Fourth Edition, Aspen Publishers, Inc., 2001, page 40 ISBN 0-8342-1726-0〕
HMOs also manage care through utilization review. That means they monitor doctors to see if they are performing more services for their patients than other doctors, or fewer. HMOs often provide preventive care for a lower copayment or for free, in order to keep members from developing a preventable condition that would require a great deal of medical services. When HMOs were coming into existence, indemnity plans often did not cover preventive services, such as immunizations, well-baby checkups, mammograms, or physicals. It is this inclusion of services intended to maintain a member's health that gave the HMO its name. Some services, such as outpatient mental health care, are limited, and more costly forms of care, diagnosis, or treatment may not be covered. Experimental treatments and elective services that are not medically necessary (such as elective plastic surgery) are almost never covered.
Other choices for managing care are case management, in which patients with catastrophic cases are identified, or disease management, in which patients with certain chronic diseases like diabetes, asthma, or some forms of cancer are identified. In either case, the HMO takes a greater level of involvement in the patient's care, assigning a case manager to the patient or a group of patients to ensure that no two providers provide overlapping care, and to ensure that the patient is receiving appropriate treatment, so that the condition does not worsen beyond what can be helped.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Health maintenance organization」の詳細全文を読む



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