Study guide
3.2 Health Maintenance Organizations (HMOs)
Accident & Health Insurance License Exam
Track your progress as you read
Finished sections get a check mark.
1 Introduction & Exam Overview
0.1 Current Exam Facts 0.2 Study Plan & Strategy
2 Chapter 1: Health Insurance Foundations
1.1 Insurance Principles and Contract Characteristics 1.2 Adverse Selection and the Underwriting Process 1.3 MIB and Consumer Reports 1.4 Policy Structure and Common A&H Provisions 1.5 The Twelve Mandatory Uniform Policy Provisions 1.6 Optional Uniform Provisions, Riders & Rights of Renewability
3 Chapter 2: Cost Sharing, Insurers, Distribution & Field Underwriting
2.1 Cost Sharing 2.2 Insurer Types, Admitted Status & Reinsurance 2.3 Marketing Systems, Agents & Brokers 2.4 Contract Law, Insurable Interest, Warranties & Representations 2.5 Field Underwriting: Application, Receipts, Delivery & Replacement 2.6 Ownership, Beneficiaries, Premium Modes & Cost Containment
4 Chapter 3: Medical Expense Plan Types
3.1 Basic and Major Medical Expense Plans 3.2 Health Maintenance Organizations (HMOs) 3.3 Preferred Provider Organizations (PPOs) 3.4 Point-of-Service (POS) and Exclusive Provider Organizations (EPOs) 3.5 Dental and Vision Plans 3.6 Limited, Supplemental & Worksite Health Policies
5 Chapter 4: Consumer-Directed Health & ACA Reforms
4.1 High-Deductible Health Plans & Health Savings Accounts 4.2 Flexible Spending Accounts & Health Reimbursement Arrangements 4.3 Coordination of Benefits 4.4 ACA Essential Health Benefits 4.5 ACA Market Reforms & Guaranteed Issue
6 Chapter 5: Disability Income Insurance
5.1 Disability Definitions 5.2 Elimination and Benefit Periods 5.3 Renewability, BOE, and SSDI 5.4 Disability Provisions and Exclusions 5.5 Group vs. Individual Disability and Taxation 5.6 Business Disability: Overhead Expense, Buy-Sell & Key Person
7 Chapter 6: Group Health, COBRA, HIPAA & ERISA
6.1 Group Health Underwriting 6.2 Contributory vs Noncontributory Plans 6.3 COBRA Continuation Coverage 6.4 HIPAA Portability & Privacy 6.5 ERISA & Employer-Sponsored Plans
8 Chapter 7: Medicare Parts A & B (Original Medicare)
7.1 Medicare Part A: Hospital Insurance 7.2 Medicare Part B: Medical Insurance
9 Chapter 8: Medicare Part C, Part D & Medigap
8.1 Medicare Advantage (Part C) 8.2 Medicare Part D (Prescription Drugs) 8.3 Medigap (Medicare Supplement Insurance)
10 Chapter 9: Medicare Enrollment, Medicaid & ACA Marketplace
9.1 Medicare Enrollment Periods 9.2 Medicaid 9.3 ACA Marketplace
11 Chapter 10: Long-Term Care Insurance
10.1 Tax-Qualified LTC & Levels of Care 10.2 ADL Triggers & Benefit Design 10.3 Inflation Protection & LTC Partnership Programs 10.4 LTC Provisions, Nonforfeiture & the NAIC Model Act
12 Chapter 11: Regulations & Ethics
11.1 Prohibited Trade & Claims Practices 11.2 Replacements, Parity, and Medicare Marketing 11.3 Producer Conduct, Premium Handling, and Ethics 11.4 Insurance Regulation, Solvency & Guaranty Associations
3.2 Health Maintenance Organizations (HMOs)
Key Takeaways Explain This Topic AI
An HMO delivers prepaid, capitated care through a closed network and requires members to select a primary care physician (PCP) who acts as a gatekeeper
Except for emergencies, services received outside the HMO network are typically not covered, making in-network use essential
Specialist visits generally require a referral from the PCP, and preventive care is emphasized with little or no cost sharing
HMOs usually charge no deductible for in-network services, relying on small copayments instead, and capitation pays providers a fixed per-member-per-month amount
Federal qualification under the federal HMO Act sets standards that federally qualified HMOs must meet, including comprehensive benefit packages and solvency requirements
Last updated: August 2026
A Health Maintenance Organization (HMO) is a managed care plan that provides a broad range of medical services to members enrolled in a closed network, in exchange for a prepaid premium. HMOs were the first broadly successful form of managed care and remain a fixture of the A&H exam because they institutionalized the ideas of gatekeeping , capitation , and preventive care .
Structure and the PCP Gatekeeper
In the traditional gatekeeper HMO model, a member selects a network primary care physician (PCP) to coordinate care, and the plan may require referrals for specialists, imaging, or admission. Modern HMO products can be open-access, so the actual plan document controls whether a PCP or referral is required. This control is what allows the HMO to manage utilization and cost.
Closed Network and Emergency Exception
HMOs operate a closed panel of providers. Except for emergency care , services obtained from non-network providers are not covered — the member pays the full charge out of pocket. This is a sharp contrast with PPO plans, which permit out-of-network use at higher cost sharing. On the exam, watch for scenario questions in which a member visits an out-of-network specialist without a referral; the correct answer is almost always that the claim is denied (no coverage) unless the visit qualified as emergency care.
Prepaid, Capitated Financing
HMOs are prepaid plans: the member (or the employer) pays a fixed periodic premium, and the HMO is responsible for providing all covered services. Providers are typically paid by capitation — a fixed per-member-per-month (PMPM) amount per assigned member, regardless of how many services that member uses. Capitation shifts financial risk from the insurer to the provider : if a member uses few services, the provider keeps the capitation as margin; if a member uses many services, the provider absorbs the cost. This is the opposite of fee-for-service , where the provider is paid per service and therefore has an incentive to deliver more services.
The economic contrast is a frequent exam point: capitation rewards the provider for keeping patients well and avoiding unnecessary care , while fee-for-service rewards the provider for delivering more services . Because the PCP's income under capitation does not rise with each extra office visit, the gatekeeper model and capitation reinforce each other — both push the system toward prevention and away from overutilization. Some HMOs blend the two, paying PCPs capitation for routine care but fee-for-service for specific procedures, or use withhold pools that return a share of withheld capitation to providers at year end if utilization targets are met.
Cost Sharing: Copays, Not Deductibles
In-network HMO services usually carry no deductible . Instead, members pay small copayments (for example, a fixed dollar amount for an office visit or a prescription) at the point of service. This design keeps out-of-pocket costs predictable and encourages members to seek early, preventive care rather than delaying until a condition becomes expensive.
Preventive Care Focus
HMOs emphasize preventive care — routine physicals, screenings, immunizations, and wellness visits — often with little or no cost sharing. The gatekeeper model and capitation both reinforce this focus: keeping members well avoids costly downstream claims, and the PCP relationship gives the plan a single point of accountability for each member's care. Under the ACA , non-grandfathered health plans (HMOs included) must cover a defined set of preventive services with no cost sharing when delivered in network — including recommended screenings, immunizations, and annual wellness visits — so an HMO member generally pays no copay for covered preventive care even though other services carry small copays. This no-cost-sharing preventive rule is a common way the exam distinguishes preventive visits (free) from diagnostic visits (copay applies).
Referrals to Specialists
When the HMO is a gatekeeper design, the member must obtain any referral required by the plan before specialist care. The referral authorizes the visit and links it to the PCP's care plan; an open-access HMO may permit direct specialist access under its own terms. The referral mechanism is also how the HMO performs utilization review : the PCP must justify medical necessity before advanced imaging, inpatient stays, or specialty consults are approved, which is why unauthorized self-referrals are denied at claims time.
OB/GYN visits are an important exception: many states and plans allow direct access to in-network OB/GYNs and certified nurse-midwives without a PCP referral, recognizing that routine maternity and well-woman care should not be gated. Some plans also permit direct access for behavioral health or chiropractic care, but the safe exam rule is to apply the plan design stated in the stem: if the plan expressly requires a referral, missing it can defeat coverage; direct-access exceptions and open-access HMOs vary.
Members may change their PCP , typically once per month or per plan cycle, by notifying the HMO; the change is usually effective on the first day of the following month. A common exam trap is the member who switches PCPs mid-treatment and assumes an open referral carries over — referrals are issued by the PCP of record at the time of service, so a PCP change can invalidate an outstanding referral.
Federal Qualification
The federal HMO Act of 1973 created a framework for federally qualified HMOs. To be federally qualified, an HMO must meet standards including:
- A comprehensive benefit package covering physician, hospital, and preventive services
- Open enrollment periods of at least 30 days per year
- Community rating (rating not based on individual health status)
- Demonstrated financial solvency
- An organized system for delivering care
Federally qualified status historically carried advantages such as employer-plan dual-choice requirements (in some states, employers that offered a commercial health plan had to also offer at least one federally qualified HMO if one operated in the area), minimum enrollment thresholds, and HMO licensing by the state insurance department. Federally qualified HMOs must also be solvent and financially sound, and the act sets standards for marketing, grievance procedures, and the scope of covered services.
HMO Organizational Models
HMOs are organized in several structural models, and the exam may describe them in scenario form:
Staff model — Physicians are employed by the HMO and typically practice in HMO-owned facilities. The HMO exercises the most control but bears the highest fixed cost.
Group model — The HMO contracts with a multi-specialty physician group (often a large group practice) that provides care to members; the group, not the HMO, employs the physicians.
Network model — The HMO contracts with several independent physician groups to expand geographic and specialty access; a member's PCP belongs to one of the contracted groups.
Individual Practice Association (IPA) model — The HMO contracts with an IPA , an association of independent physicians who maintain their own offices and see both HMO and non-HMO patients. This is the loosest model and the most common in modern HMO plans.
These models differ in how physicians are paid (salary vs. capitation vs. fee-for-service with withhold) and in how tightly the HMO controls practice patterns, but all four share the closed-network, gatekeeper, prepaid features that define an HMO.
Closed-Panel vs. Open-Panel HMOs
A closed-panel HMO requires members to receive care only from salaried or contracted physicians in HMO-affiliated facilities — there is no choice of outside provider. An open-panel HMO (typically the IPA model) lets members choose among independent community physicians who have contracted with the HMO, while still operating under the gatekeeper and referral rules. The panel structure affects member choice of doctor, but it does not change the core rule that out-of-network care (except emergencies) is not covered.
Out-of-Area Emergency Care
HMOs cover emergency care even when the member is outside the service area or treated by a non-network provider. If a prudent layperson would reasonably regard the situation as an emergency (sudden onset, severe symptoms, or threat to life or limb), the HMO must cover the emergency visit without requiring prior authorization. Follow-up care after the member is stabilized, however, must be returned to the network PCP for coordination, or it will not be covered. This emergency exception is the single most-tested out-of-network scenario for HMOs.
Advantages and Trade-offs
- Strength Trade-off
- Predictable out-of-pocket costs (copays, no deductible) Closed network limits provider choice
- Strong preventive care emphasis Referral required for specialists
- Capitation controls cost growth Out-of-network care (except emergencies) not covered
- Single PCP coordinates care Less direct access to specialists than PPO
- Key Takeaways
A traditional gatekeeper HMO uses a PCP , often uses capitation , and covers a closed network — but current plan designs vary, including open-access HMOs, so the plan document controls referral requirements.
In-network services typically carry no deductible and only small copayments .
In a gatekeeper HMO , required referrals control specialist access; open-access HMO designs and statutory direct-access rules vary.
Federal qualification under the federal HMO Act requires comprehensive benefits, open enrollment, community rating, and solvency.