: an organization that provides comprehensive health care to voluntarily enrolled individuals and families in a particular geographic area by member physicians with limited referral to outside specialists and that is financed by fixed periodic payments determined in advance

called also health maintenance organization

Examples of HMO in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Representatives of Rocky Mountain HMO did not immediately respond to a request for comment. Meg Wingerter, Denver Post, 20 Aug. 2025 Post-War Decisions Eroded Hard-Won Gains Instead of recognizing the value of military health, budget officials in the Pentagon viewed the MHS as little more than an HMO for beneficiaries. Arthur L. Kellermann, Forbes.com, 20 Aug. 2025 That represents about 40% of the 1.5 million active and retired state workers and family members who are enrolled in the system’s HMO and PPO plans. William Melhado, Sacbee.com, 29 July 2025 Fortuitously for patients, the UC-Anthem negotiations reached a new contract before HMO patients were forced to choose new primary care physicians, and, no doubt, many are hoping that will be the case again. Paul Sisson, San Diego Union-Tribune, 3 July 2025 The profit motive meant that HMO administrators had an incentive to discourage patient utilization of medical services, often leading to understaffed facilities in an attempt to reduce costs and increase profits. Time, 6 May 2025

Word History

First Known Use

1971, in the meaning defined above

Time Traveler
The first known use of HMO was in 1971

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Cite this Entry

“HMO.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/HMO. Accessed 10 Sep. 2025.

Medical Definition

plural HMOs
: an organization that provides comprehensive health care to voluntarily enrolled individuals and families in a particular geographic area by member physicians with limited referral to outside specialists and that is financed by fixed periodic payments determined in advance

called also health maintenance organization

compare ppo

More from Merriam-Webster on HMO

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