9.3 Managed Care: HMO, PPO, POS, and HSA/HDHP

The managed-care spectrum

Managed care controls cost and quality by integrating financing and delivery of care, steering members to contracted providers and emphasizing prevention. The exam wants you to rank four models on how tightly they restrict choice and how they pay providers.

• HMO (Health Maintenance Organization) — most restrictive. Care is delivered through contracted network providers; a primary care physician (PCP) acts as gatekeeper and must refer to specialists. Out-of-network care is generally not covered except emergencies. HMOs emphasize preventive care and typically charge fixed copays instead of deductibles/coinsurance.
• PPO (Preferred Provider Organization) — flexible. A network of preferred providers gives lower cost-sharing in-network, but members may go out-of-network at higher cost without a referral. No gatekeeper.
• POS (Point of Service) — hybrid. Uses a PCP/gatekeeper like an HMO for in-network care but lets members go out-of-network (POS "opts out") at higher cost like a PPO.

How HMOs are organized and paid

HMO models differ by how physicians are employed and paid, a favorite exam distinction:

Capitation pays a provider a fixed amount per member per month (PMPM) regardless of how much care that member uses, shifting utilization risk to the provider. This is a core cost-containment tool that distinguishes HMO-style financing from traditional fee-for-service. HMOs must also offer access to care within a defined service area; a member who moves outside it may lose coverage.

Consumer-driven plans: HDHP and HSA

A High-Deductible Health Plan (HDHP) pairs a low premium with a high deductible and is the gateway to a Health Savings Account (HSA) — a tax-advantaged account used to pay qualified medical expenses.

To open an HSA the insured must be covered by an HSA-qualified HDHP, have no other disqualifying coverage, and not be enrolled in Medicare or claimed as a dependent. Tax treatment is the triple advantage tested heavily:

• Contributions are tax-deductible (or pre-tax through an employer cafeteria plan).
• Earnings grow tax-deferred.
• Withdrawals for qualified medical expenses are tax-free.

Funds roll over year to year and are portable (the account belongs to the individual). Non-qualified withdrawals are taxable plus a 20% penalty before age 65; after 65 the penalty disappears but ordinary income tax still applies to non-medical withdrawals. Contrast this with an FSA, which is employer-owned and generally use-it-or-lose-it.

Watch the exact HDHP/HSA limits, which the IRS indexes annually — the exam tests the structure (qualifying HDHP, no Medicare, rollover, triple tax benefit) far more than the current dollar figures.

EPO, indemnity comparison, and key HMO rules

A fifth model rounds out the spectrum: the EPO (Exclusive Provider Organization) covers in-network care only like an HMO but generally drops the gatekeeper/referral requirement like a PPO. Ranking restrictiveness from tightest to loosest: HMO, then EPO and POS, then PPO, then a traditional indemnity (fee-for-service) plan that lets the insured see any provider but pays on a reimbursement basis with deductibles and coinsurance.

Several HMO rules appear repeatedly on the exam:

• Prepaid basis — members pay a fixed periodic premium for access to a defined set of services, not per-visit charges; copays are small and fixed.
• Emergency care — out-of-area or out-of-network emergencies are covered; routine out-of-network care is not.
• Service area — care is delivered within a geographic area; the HMO need not cover routine care obtained outside it.
• Open enrollment — many HMOs hold a period during which they accept applicants regardless of health status.
• Limited choice for lower cost — the member trades provider freedom for predictable, lower out-of-pocket cost.

With consumer-driven plans, an employer may pair an HDHP with a Health Reimbursement Arrangement (HRA) instead of an HSA. The HRA is employer-funded and employer-owned: the employer sets the rules, contributions are not the employee's property, and unused amounts may or may not carry over at the employer's option. Distinguish it from the individually owned, portable HSA and the use-it-or-lose-it FSA.

Why managed care exists and how to compare plans

Managed care arose to slow the cost growth of unmanaged fee-for-service medicine by integrating financing with delivery and rewarding prevention. When comparing two plans on the exam, weigh three dimensions: provider freedom (can the member see anyone, or only the network?), cost structure (copays vs. deductible-plus-coinsurance), and gatekeeping (is a referral required?).

The broad trade-off the exam wants you to articulate: tighter networks and gatekeeping buy lower, more predictable cost, while looser plans buy more choice at higher cost. Consumer-driven HDHP/HSA designs add a fourth option — accept a high deductible to capture a low premium plus a tax-favored savings account the member controls.