12.2 Medical Plans: HMO, PPO, POS, EPO, HDHP/HSA

Managed care integrates the financing and delivery of health services, contracting with providers to control cost and quality. The exam expects you to compare the major plan structures along three axes: network restriction, need for referrals, and out-of-network coverage. Read every scenario for those three clues.

Health Maintenance Organization (HMO)

An HMO is the most restrictive and historically the lowest-cost model. Key features:

• Primary Care Physician (PCP) acts as the gatekeeper; specialist care requires a referral.
• Care is generally covered only in-network, except for emergencies.
• Emphasis on preventive care to reduce later claims.
• Providers are often paid by capitation — a fixed monthly amount per enrolled member regardless of services used.

PPO, EPO, and POS

The Preferred Provider Organization (PPO) trades cost control for freedom. Members may see any provider and need no referral, but they pay less in-network and more out-of-network. The Exclusive Provider Organization (EPO) sits between the HMO and PPO: no referrals required like a PPO, but no out-of-network coverage like an HMO.

The Point-of-Service (POS) plan is a hybrid — it uses an HMO-style gatekeeper PCP but lets members go out-of-network at the point of service for higher cost-sharing.

Exam Tip: The fastest sort is the referral question. If a referral is required, it is an HMO or POS; if not, it is a PPO or EPO. Then ask whether out-of-network care is covered to finish the identification.

High-Deductible Health Plan (HDHP) and the HSA

A High-Deductible Health Plan (HDHP) pairs a low premium with a high deductible. When it meets IRS minimums, it qualifies the insured to fund a Health Savings Account (HSA) — a tax-advantaged account that pays for qualified medical expenses.

HSA tax triple-advantage:

• Contributions are tax-deductible (or pre-tax through payroll).
• Growth is tax-deferred.
• Withdrawals for qualified medical expenses are tax-free.

The account is owned by the individual, is fully portable between jobs, and unused balances roll over every year with no "use-it-or-lose-it" forfeiture. To contribute, the person must be covered by a qualifying HDHP and have no other disqualifying coverage (and cannot be enrolled in Medicare).

Network Tiers and the Allowed Amount

Every managed-care plan rests on a provider network — doctors and facilities that contract to accept the plan's allowed amount as payment in full. In-network providers cannot balance bill the patient for the difference between their normal charge and the allowed amount, which is the single biggest driver of lower in-network costs. Out-of-network providers have no such contract, so the insured may owe the balance on top of higher coinsurance. When a scenario shows a surprise bill far above the coinsurance share, suspect out-of-network balance billing rather than a math error.

Capitation, Fee-for-Service, and Provider Incentives

The way a plan pays providers shapes its behavior. Under fee-for-service, the provider is paid for each service rendered, which can encourage over-utilization. Under capitation (common in HMOs), the provider receives a fixed monthly fee per member regardless of services, which rewards prevention but can pressure providers to under-serve. PPOs typically use discounted fee-for-service negotiated below UCR. Managed-care plans layer the cost-containment tools from Section 12.1 on top of these payment models to balance the incentives and keep the pool solvent.

HSA Numeric Limits and Traps

The IRS publishes annual figures; memorize the structure, not just one year's dollar amount, because the exam may give you the numbers in the stem.

• A catch-up contribution of $1,000 is allowed at age 55+.
• Nonqualified withdrawals before age 65 are taxed as income plus a 20% penalty.
• After age 65, nonqualified withdrawals are taxed as income with no penalty (similar to a traditional IRA), but qualified medical withdrawals remain tax-free.

Trap: Do not confuse the HSA (paired with an HDHP, individually owned, rolls over) with a Flexible Spending Account (FSA) (employer-owned, largely use-it-or-lose-it) or a Health Reimbursement Arrangement (HRA) (employer-funded only).

HMO Core Features

A Health Maintenance Organization (HMO) is the most restrictive managed-care model and a frequent exam comparison point. Its hallmarks:

• Care is generally covered only in-network (except true emergencies).
• A primary care physician (PCP) acts as a gatekeeper, and specialist visits require a referral.
• Strong emphasis on preventive care; providers are often paid by capitation (a fixed amount per member per month).

The HDHP/HSA Numbers

A High-Deductible Health Plan (HDHP) pairs with a Health Savings Account (HSA), a tax-advantaged account that is triple-tax-advantaged: contributions are deductible, growth is tax-free, and qualified medical withdrawals are tax-free.

HSA eligibility rules the exam tests:

• The account holder must be covered by a qualifying HDHP and have no other disqualifying coverage (and not be enrolled in Medicare).
• Funds roll over year to year (no "use it or lose it," unlike an FSA) and are portable.
• Non-medical withdrawals before age 65 are taxable plus a 20% penalty; after 65 they are taxable but penalty-free.

Exam Tip: HSA = rolls over and is portable; FSA = generally use-it-or-lose-it and employer-owned. Enrolling in Medicare ends HSA eligibility to contribute.