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	🏥 '''~~Health~~ maintenance organization (HMO)~~'''~~ is a type of ~~[[Definition:Managed care \|~~ managed care]] ~~organization~~ that provides [[Definition:Health insurance \| health insurance]] coverage through a defined network of physicians, hospitals, and other ~~[[Definition:Healthcare~~ ~~provider~~ \| ~~healthcare~~ ~~providers]]~~ ~~who~~ ~~have~~ ~~contracted~~ ~~with~~ the ~~plan~~ to ~~deliver~~ ~~services~~ at ~~negotiated~~ ~~rates.~~ ~~Unlike~~ ~~more~~ ~~flexible~~ ~~plan~~ ~~structures~~ ~~such~~ as [[Definition:~~Preferred~~ ~~provider organization (PPO)~~ \| ~~PPOs~~]], an ~~HMO~~ ~~typically~~ ~~requires~~ ~~members~~ to ~~select~~ a ~~[[Definition:Primary~~ ~~care~~ ~~physician~~ ~~(PCP)~~ \| ~~primary~~ ~~care~~ ~~physician]]~~ ~~who~~ ~~coordinates~~ ~~all~~ ~~care~~ ~~and~~ ~~provides~~ [[Definition:~~Referral~~ \| ~~referrals~~]] to ~~specialists~~ ~~within~~ ~~the~~ ~~network.~~ In the ~~insurance~~ ~~industry,~~ ~~HMOs~~ ~~represent~~ ~~one~~ of ~~the~~ ~~foundational~~ ~~models~~ ~~for~~ ~~managing~~ ~~both~~ ~~the~~ ~~financing~~ ~~and~~ ~~delivery~~ of ~~healthcare~~ ~~services~~ ~~under~~ a ~~single organizational framework~~.		🏥 A '''health maintenance organization''' (HMO) is a type of managed care entity that provides or arranges [[Definition:Health insurance \| health insurance]] coverage through a defined network of physicians, hospitals, and other providers, typically requiring members to select a primary care physician and obtain referrals before accessing specialist services. Originating in the United States — where the HMO Act of 1973 gave federal endorsement to the model — HMOs represented a fundamental shift away from traditional fee-for-service [[Definition:Indemnity insurance \| indemnity]] health plans by integrating the financing and delivery of healthcare within a single organizational framework. While the term is most closely associated with the U.S. [[Definition:Health insurance \| health insurance]] market, managed care principles inspired by the HMO model have influenced health plan design and insurance regulation in markets across Latin America, parts of Asia, and select European countries.

			⚙️ Under the HMO model, the organization receives a fixed per-member, per-month [[Definition:Premium \| premium]] (capitation) from enrollees or their employers and assumes financial responsibility for delivering a contracted scope of covered services. This structure creates a fundamentally different [[Definition:Underwriting \| underwriting]] dynamic compared to traditional health indemnity coverage: the HMO bears the risk that actual healthcare utilization will exceed the capitated revenue, incentivizing investment in [[Definition:Loss prevention \| preventive care]], care coordination, and utilization management. Some HMOs employ physicians directly (the "staff model"), while others contract with independent physician groups (the "group" or "IPA model"). [[Definition:Insurance regulator \| Regulators]] typically subject HMOs to specific financial solvency and network adequacy standards — in the U.S., state insurance departments and the Centers for Medicare and Medicaid Services oversee HMO licensing and compliance, while analogous managed care oversight exists in countries like Brazil (through the ANS) and the Philippines (through the Insurance Commission).
	⚙️ Members pay a monthly [[Definition:Premium \| premium]] and, in most cases, modest [[Definition:Copayment \| copayments]] at the point of service, while the HMO assumes responsibility for arranging and covering a comprehensive set of medical benefits. The model relies on [[Definition:Capitation \| capitation]] or other prepaid reimbursement arrangements with providers, which shifts financial risk away from the [[Definition:Insured \| insured]] and incentivizes the network to control costs through preventive care and utilization management. Services obtained outside the network are generally not covered except in emergencies, which keeps the [[Definition:Risk pool \| risk pool]] more predictable and gives [[Definition:Actuarial analysis \| actuaries]] a tighter dataset for pricing. Insurers operating HMOs must comply with state-specific licensing requirements and federal regulations, including those established under the [[Definition:Affordable Care Act (ACA) \| Affordable Care Act]].

			📊 The HMO model's significance to the insurance industry lies in how it redefined the relationship between risk-bearing, care delivery, and cost control. By placing the insurer in a position to influence clinical decisions — through network restrictions, formulary management, and prior authorization requirements — HMOs pioneered tools that are now embedded across virtually all forms of [[Definition:Managed care \| managed care]], including [[Definition:Preferred provider organization (PPO) \| PPOs]] and point-of-service plans. For [[Definition:Actuarial science \| actuaries]] and health insurance [[Definition:Underwriter \| underwriters]], the capitation model demands sophisticated forecasting of utilization patterns, provider cost trends, and member risk profiles. The tension between cost containment and access to care that HMOs embody remains one of the central policy and business challenges in health insurance markets worldwide, and understanding this model is foundational for anyone working in health plan design, [[Definition:Reinsurance \| reinsurance]] of health risks, or [[Definition:Insurtech \| insurtech]] solutions targeting the managed care space.
	💡 For insurers, the HMO model offers a powerful mechanism to align cost containment with care quality — a balance that has only grown more critical as [[Definition:Medical loss ratio (MLR) \| medical loss ratios]] face regulatory scrutiny. Because the organization controls both the insurance function and the provider network, it can implement [[Definition:Care management \| care management]] programs, negotiate favorable [[Definition:Fee schedule \| fee schedules]], and monitor [[Definition:Utilization review \| utilization]] in ways that indemnity-style plans cannot easily replicate. The trade-off, of course, is member flexibility, and consumer satisfaction surveys consistently highlight network restrictions as the primary drawback. Still, HMOs remain a cornerstone of the [[Definition:Group health insurance \| group health]] market and continue to evolve through technology-enabled care coordination and [[Definition:Telehealth \| telehealth]] integration.

	'''Related concepts'''		'''Related concepts:'''
	{{Div col\|colwidth=20em}}		{{Div col\|colwidth=20em}}
	* [[Definition:~~Preferred~~ ~~provider organization (PPO)~~]]		* [[Definition:Health insurance]]
	* [[Definition:Managed care]]		* [[Definition:Managed care]]
			* [[Definition:Preferred provider organization (PPO)]]
	* [[Definition:Capitation]]		* [[Definition:Capitation]]
	* [[Definition:~~Primary~~ ~~care physician (PCP)~~]]		* [[Definition:Actuarial science]]
	* [[Definition:~~Medical~~ ~~loss ratio (MLR)~~]]		* [[Definition:Utilization review]]
	* [[Definition:Affordable Care Act (ACA)]]
	{{Div col end}}		{{Div col end}}

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🏥 '''Health maintenance organization (HMO)''' is a type of [[Definition:Managed care | managed care]] organization that provides [[Definition:Health insurance | health insurance]] coverage through a defined network of physicians, hospitals, and other [[Definition:Healthcare provider | healthcare providers]] who have contracted with the plan to deliver services at negotiated rates. Unlike more flexible plan structures such as [[Definition:Preferred provider organization (PPO) | PPOs]], an HMO typically requires members to select a [[Definition:Primary care physician (PCP) | primary care physician]] who coordinates all care and provides [[Definition:Referral | referrals]] to specialists within the network. In the insurance industry, HMOs represent one of the foundational models for managing both the financing and delivery of healthcare services under a single organizational framework.

⚙️ Members pay a monthly [[Definition:Premium | premium]] and, in most cases, modest [[Definition:Copayment | copayments]] at the point of service, while the HMO assumes responsibility for arranging and covering a comprehensive set of medical benefits. The model relies on [[Definition:Capitation | capitation]] or other prepaid reimbursement arrangements with providers, which shifts financial risk away from the [[Definition:Insured | insured]] and incentivizes the network to control costs through preventive care and utilization management. Services obtained outside the network are generally not covered except in emergencies, which keeps the [[Definition:Risk pool | risk pool]] more predictable and gives [[Definition:Actuarial analysis | actuaries]] a tighter dataset for pricing. Insurers operating HMOs must comply with state-specific licensing requirements and federal regulations, including those established under the [[Definition:Affordable Care Act (ACA) | Affordable Care Act]].

💡 For insurers, the HMO model offers a powerful mechanism to align cost containment with care quality — a balance that has only grown more critical as [[Definition:Medical loss ratio (MLR) | medical loss ratios]] face regulatory scrutiny. Because the organization controls both the insurance function and the provider network, it can implement [[Definition:Care management | care management]] programs, negotiate favorable [[Definition:Fee schedule | fee schedules]], and monitor [[Definition:Utilization review | utilization]] in ways that indemnity-style plans cannot easily replicate. The trade-off, of course, is member flexibility, and consumer satisfaction surveys consistently highlight network restrictions as the primary drawback. Still, HMOs remain a cornerstone of the [[Definition:Group health insurance | group health]] market and continue to evolve through technology-enabled care coordination and [[Definition:Telehealth | telehealth]] integration.

'''Related concepts'''
{{Div col|colwidth=20em}}
* [[Definition:Preferred provider organization (PPO)]]
* [[Definition:Managed care]]
* [[Definition:Capitation]]
* [[Definition:Primary care physician (PCP)]]
* [[Definition:Medical loss ratio (MLR)]]
* [[Definition:Affordable Care Act (ACA)]]
{{Div col end}}

Definition:Health maintenance organization (HMO) - Revision history

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