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

Why Managed Care Exists

Traditional indemnity (fee-for-service) plans paid providers per service with little control over utilization, driving costs up. Managed care integrates the financing and delivery of care to control cost and coordinate quality. The exam tests four arrangements — HMO, PPO, POS, and the consumer-directed HSA/HDHP pairing — plus the structural ideas they share: networks, gatekeepers, prepaid/capitated payment, and emphasis on preventive care.

The HMO (Health Maintenance Organization) is the most tightly managed model. Members pay a fixed periodic premium (prepaid care) and use only in-network providers; out-of-network care is generally not covered except in emergencies. Members select a primary care physician (PCP) who acts as the gatekeeper — referrals from the PCP are required to see specialists. HMOs stress preventive care (annual physicals, screenings) because keeping members healthy lowers cost. Providers are often paid by capitation — a fixed per-member-per-month amount regardless of services rendered.

Comparing the Four Models

The PPO (Preferred Provider Organization) contracts with providers for discounted fees. Members may go out of network but pay more, and no gatekeeper/referral is required — this flexibility is the PPO's selling point. The POS (Point of Service) plan is a hybrid: members choose, at the point of service, whether to use the in-network gatekeeper route (lowest cost, like an HMO) or go out-of-network (higher cost, like a PPO).

Consumer-Directed Plans: HSA + HDHP

A Health Savings Account (HSA) is a tax-advantaged account that must be paired with a qualifying High-Deductible Health Plan (HDHP). The HDHP carries a high deductible (set annually by the IRS) and a capped out-of-pocket maximum; the HSA lets the insured save pre-tax dollars to pay the deductible and other qualified medical expenses.

HSA tax features the exam loves:

• Triple tax advantage: contributions are tax-deductible (or pre-tax through payroll), growth is tax-deferred, and qualified medical withdrawals are tax-free.
• Funds roll over year to year (unlike an FSA's use-it-or-lose-it) and the account is portable — it belongs to the individual, not the employer.
• Non-qualified withdrawals before age 65 are taxed as income plus a 20% penalty. After age 65, non-qualified withdrawals are taxed as income but the 20% penalty is waived (similar to a retirement account).
• To contribute, the insured must be covered by an HDHP, not enrolled in Medicare, and not claimed as a dependent.

Trap: Students confuse an HSA (paired with HDHP, owned by employee, rolls over) with an FSA (Flexible Spending Account — employer-owned, generally forfeited at year-end) and an HRA (employer-funded, employer-owned reimbursement). Only the HSA requires an HDHP and is portable.

EPOs, Tiered Networks, and Provider Models

The four core models are not the whole map. An Exclusive Provider Organization (EPO) behaves like a PPO without a gatekeeper but, like an HMO, covers no out-of-network care except emergencies, so it sits between the two. Tiered networks sort in-network providers into preferred and standard tiers with different cost-sharing to steer members toward efficient providers.

The HMO itself comes in distinct provider models the exam names: the staff model (physicians are salaried HMO employees), the group model (the HMO contracts with one multispecialty group), the network model (contracts with several groups), and the Independent Practice Association (IPA) model (contracts with independent physicians who keep private practices).

HSA Contribution Mechanics and a Worked Example

HSA contribution limits are set annually by the IRS and differ for self-only versus family HDHP coverage, with an extra catch-up amount allowed at age 55 and older. Suppose an employee under family HDHP coverage may contribute up to the family maximum and adds the age-55 catch-up because she is 56. If the family limit is $8,300 and the catch-up is $1,000, she may deposit $9,300, deduct it from income, let it grow tax-deferred, and withdraw it tax-free for qualified medical costs. Each dollar she spends on a qualified expense escapes tax at all three stages, which is why the HSA outperforms an FSA for long-horizon savers.

FSA, HRA, and HSA Side by Side

Additional Exam Traps

• An EPO covers no out-of-network care yet uses no gatekeeper, blending HMO and PPO traits.
• Only the HSA is employee-owned, portable, and tied to an HDHP.
• Capitation pays providers per member per month regardless of services, shifting utilization risk to the provider.