15.1 ACA Essential Health Benefits and Metal Levels

The Affordable Care Act (ACA), signed March 23, 2010, restructured the individual and small-group health markets. For the licensing exam you must master four pillars of qualified health plan (QHP) design: essential health benefits (EHBs), metal levels actuarial value, out-of-pocket maximums, and the no-cost preventive care mandate. These rules apply to non-grandfathered plans in the individual and small-group markets; large-group and self-funded plans follow different rules.

The Ten Essential Health Benefits

Every non-grandfathered individual and small-group plan must cover ten categories of EHBs without annual or lifetime dollar limits. Memorize all ten; exam items often list a service and ask whether it is an EHB.

Trap: Annual and Lifetime Limits

The ACA bans annual and lifetime dollar limits on EHBs. It does not ban limits stated in units of service (for example, a cap on the number of physical-therapy visits) or limits on non-EHB benefits. A common exam distractor states that the ACA prohibits all visit limits; that is false.

Minimum Essential Coverage and Grandfathered Plans

A related concept is minimum essential coverage (MEC) — the type of coverage an individual needed to satisfy the original individual mandate. MEC includes Marketplace plans, employer group plans, Medicare Part A, Medicaid, CHIP, and TRICARE. Short-term limited-duration plans, fixed indemnity plans, dental-only, and accident-only policies are not MEC. Although the federal individual-mandate penalty is now $0, MEC status still matters: eligibility for an affordable employer plan that is MEC makes a worker ineligible for a premium tax credit.

Grandfathered plans are individual or group plans that existed on March 23, 2010, and have not made significant benefit cuts or cost-sharing increases. They are exempt from several ACA rules — they need not cover all ten EHBs and need not provide free preventive care — but they must still honor the ban on lifetime limits and extend dependent coverage to age 26. A plan loses grandfathered status permanently once it materially reduces benefits or raises cost-sharing beyond set thresholds.

Dependent Coverage to Age 26

Non-grandfathered and grandfathered plans that offer dependent coverage must allow children to remain on a parent's plan until age 26, regardless of marital status, residence, financial dependency, or student status. This is a frequently tested protection.

Metal Levels and Actuarial Value

QHPs are grouped into four metal tiers defined by actuarial value (AV) — the percentage of total covered medical costs the plan pays for a standard population. The enrollee pays the remainder through deductibles, copays, and coinsurance.

Higher metal levels mean higher premiums but lower out-of-pocket costs at the point of care. AV is a population average, not a guarantee for any single enrollee.

Worked Example: Choosing on Total Cost

A healthy 30-year-old expects only one routine visit per year. A Bronze plan costs $310/month ($3,720/year) with a $7,000 deductible. A Gold plan costs $520/month ($6,240/year) with a $1,500 deductible. With minimal expected claims, the Bronze plan's lower premium wins on total annual outlay even though its AV is lower. The exam tests the concept that low utilizers favor lower metal tiers while high utilizers favor Gold/Platinum.

Catastrophic Plans and Cost-Sharing Caps

A fifth option, the catastrophic plan, is available only to people under 30 or those with a hardship/affordability exemption. It carries very low premiums, a high deductible equal to the annual out-of-pocket (OOP) maximum, and still covers three primary-care visits and all preventive services before the deductible.

The ACA caps total annual out-of-pocket spending for in-network EHBs. For 2025 the maximum is $9,200 for self-only and $18,400 for family coverage (figures index annually). Premiums, out-of-network charges, and non-EHB services do not count toward this cap.

Preventive Services Mandate

Non-grandfathered plans must cover a defined list of preventive services — immunizations, many cancer screenings, contraception, and well-child visits — with zero cost-sharing when delivered in network, even before the deductible is met. The required list comes from recommendations of the U.S. Preventive Services Task Force, the CDC, and HRSA. If a provider delivers a covered screening as part of an office visit, the screening itself carries no copay even though the office visit may. A frequent distractor claims preventive services apply the deductible first; for in-network listed services that is incorrect.

How the Pieces Interact

The four design rules work together to define value. EHBs set what must be covered, the metal level sets the average share the plan pays, the out-of-pocket maximum caps the enrollee's worst-case exposure, and the preventive mandate guarantees free front-end care. When comparing two plans, an exam answer should weigh premium against expected utilization and the deductible/OOP structure, not metal level alone.

Worked Example: Reaching the Out-of-Pocket Maximum

An enrollee has a Silver plan with a $4,000 deductible and a $9,200 self-only OOP maximum. After a major surgery generates $60,000 in covered in-network EHB charges, the most the enrollee can owe for the year is $9,200; the plan pays the remaining $50,800. Premiums paid during the year are separate and never count toward the OOP maximum — another common test point.