15.1 ACA Essential Health Benefits and Metal Levels
Key Takeaways
- The ACA requires non-grandfathered individual and small-group plans to cover ten categories of Essential Health Benefits (EHBs) with no annual or lifetime dollar limits on EHBs.
- Metal levels (Bronze, Silver, Gold, Platinum) describe actuarial value (AV) — the share of total covered EHB costs the plan pays for a standard population — not the share for any one individual.
- Actuarial value is 60% Bronze, 70% Silver, 80% Gold, 90% Platinum, each within a permitted de minimis variation band, and catastrophic plans sit below Bronze.
- Preventive services rated A or B by the USPSTF must be covered at zero cost-sharing when delivered in-network, even before the deductible is met.
- A higher metal level means higher premium but lower out-of-pocket exposure; AV does not equal what one specific person will actually pay.
Essential Health Benefits (EHBs)
The Affordable Care Act (ACA, the Patient Protection and Affordable Care Act of 2010) requires every non-grandfathered individual and small-group health plan to cover a defined set of Essential Health Benefits. A grandfathered plan is one that existed on March 23, 2010 and has not made disqualifying changes; it is exempt from many EHB rules. Exam questions usually test the ten EHB categories and the rule that an insurer may not impose annual or lifetime dollar limits on EHBs.
The ten EHB categories are:
- Ambulatory (outpatient) patient services
- Emergency services
- Hospitalization
- Maternity and newborn care
- Mental health and substance use disorder services, including behavioral health treatment
- Prescription drugs
- Rehabilitative and habilitative services and devices
- Laboratory services
- Preventive and wellness services and chronic disease management
- Pediatric services, including oral and vision care
A common trap: adult dental and vision are not EHBs, but pediatric dental and vision are. Maternity coverage is mandatory on these plans even for a single male applicant — a frequent distractor.
No dollar limits, but cost-sharing is allowed
The ACA bars annual and lifetime dollar limits on EHBs. It does not bar cost-sharing. Deductibles, copays, and coinsurance still apply, and a plan may still limit the number of covered visits (a non-dollar limit) for some services. So a plan can require coinsurance on hospital stays, but it cannot cap the dollar amount it will ever pay for those EHB stays.
Preventive care at zero cost-sharing
Non-grandfathered plans must cover certain preventive services with no cost-sharing when delivered in-network — no deductible, copay, or coinsurance. These include:
- Services rated A or B by the U.S. Preventive Services Task Force (USPSTF)
- Routine immunizations recommended by the CDC
- Preventive care and screenings for women and children
Watch the in-network condition: zero cost-sharing applies in-network only, and a diagnostic service ordered because of a finding may then be subject to normal cost-sharing.
An ACA-compliant individual major medical plan imposes a $1,000,000 lifetime dollar limit on hospitalization, which is an essential health benefit. Is this permitted?
Metal levels and actuarial value
Marketplace and ACA-compliant off-exchange plans are grouped into four metal levels by actuarial value (AV) — the percentage of total covered EHB costs the plan pays for a standard population, averaged across all enrollees. AV is not the percentage any one person will pay; an individual's actual share depends on how much care that person uses.
| Metal level | Actuarial value (plan pays) | Member pays (avg) | Premium |
|---|---|---|---|
| Bronze | ~60% | ~40% | Lowest |
| Silver | ~70% | ~30% | Lower |
| Gold | ~80% | ~20% | Higher |
| Platinum | ~90% | ~10% | Highest |
Each level has a small de minimis variation band (commonly a few percentage points) so plans need not hit the AV exactly. The inverse relationship is the tested concept: as the metal level rises, premium rises but out-of-pocket exposure falls.
Catastrophic plans
Below Bronze sit catastrophic plans, with high deductibles and low premiums. Eligibility is restricted: generally to people under age 30, or to those with a hardship or affordability exemption. Catastrophic plans still cover the EHBs and at least three primary-care visits and preventive care before the deductible, but premium tax credits cannot be applied to them.
Worked example — AV is population-level
Suppose a Silver plan has a 70% AV. That means that for a standard population, the plan pays about 70% of total covered EHB costs and members pay about 30% through deductibles, copays, and coinsurance.
Now take one healthy enrollee who incurs only a single $200 in-network office visit subject to a $30 copay. That person pays $30 of $200 — about 15% — far below the 30% population average. A second enrollee with a major hospitalization may hit the deductible and the annual out-of-pocket maximum, paying a much larger raw dollar amount but a small percentage of the total bill.
The exam point: AV describes the plan's design for the group, not the result for any individual. A high-AV Platinum plan still leaves cost-sharing in place; it simply pays a larger average share.
Annual out-of-pocket maximum
All ACA-compliant plans must include an annual out-of-pocket maximum on EHBs (set each year by federal rule). Once a member reaches it for in-network EHBs, the plan pays 100% of further covered in-network EHB costs for the rest of the plan year. Premiums never count toward the out-of-pocket maximum, and non-covered or out-of-network services may not count either.
A client says a Gold plan with 80% actuarial value means the insurer will pay exactly 80% of HER medical bills this year. What is the correct producer response?
A Metal-Level AV Grid and an Out-of-Pocket-Max Worked Example
The ACA defines ten Essential Health Benefits (EHBs) every non-grandfathered individual and small-group plan must cover, and it sorts plans into metal levels by actuarial value (AV) — the share of total covered costs the plan pays for a standard population. A grid fixes the four levels.
| Metal level | Actuarial value (plan pays) | Member shares |
|---|---|---|
| Bronze | ~60% | ~40% |
| Silver | ~70% | ~30% |
| Gold | ~80% | ~20% |
| Platinum | ~90% | ~10% |
The exam's key conceptual trap is that AV is a population-level average, not a guarantee for any one person: a Bronze plan paying "60%" does not mean a specific enrollee pays 40% of their own bill — a healthy person may pay nearly everything up to the deductible, while a very sick person hits the out-of-pocket maximum. AV measures the plan's generosity across a standard risk pool, which is how plans are compared apples-to-apples.
Worked out-of-pocket maximum example, the EHB-related cap that always applies: the ACA bars annual and lifetime dollar limits on EHBs and caps a member's in-network cost-sharing each year. Suppose a Silver plan has a $5,000 deductible and a $9,000 out-of-pocket maximum. A member with $120,000 of covered claims pays the deductible and coinsurance only until reaching the $9,000 cap, after which the plan pays 100% of further in-network EHB costs for the year.
The ten EHBs — ambulatory care, emergency, hospitalization, maternity/newborn, mental health/substance use, prescription drugs, rehabilitative services, lab, preventive/chronic-disease management, and pediatric services including dental and vision — must all be covered, and preventive services are paid at 100% with no cost-sharing, a frequently tested point.