The 10 Essential Health Benefits Every Marketplace Plan Must Cover

Why the Ten Essential Health Benefits Exist

Before the Affordable Care Act passed in 2010, insurers could sell health plans that were, for lack of a better word, swiss cheese. A plan might cover hospital stays but skip maternity care entirely. Another might pay for surgery but refuse to cover prescription drugs. People bought what looked like solid coverage, got sick, and discovered gaping holes only when they needed the plan most.

The ACA fixed that by defining ten categories of care — called Essential Health Benefits (EHBs) — that every plan sold on the individual and small-group market must include. If you buy a plan through HealthCare.gov or your state's exchange, all ten are in there. Full stop. Insurers can't strip them out to cut costs or make a plan look cheaper on the surface.

That said, there's nuance worth knowing. The federal law sets the categories, but states choose a benchmark plan that determines exactly which services within each category get covered. So an EHB requirement in Texas may look slightly different in practice than the same requirement in California. The categories are identical; the specific services can vary a bit. To understand the full framework, see our guide to how ACA marketplace plans work.

The Ten Categories, Explained in Plain English

Here are all ten Essential Health Benefit categories, what they actually cover, and why each one matters in real-life terms.

1. Ambulatory Patient Services (Outpatient Care)

This covers care you get without being admitted to a hospital overnight — doctor visits, urgent care, outpatient surgery, and specialist appointments. It's the category you'll use most often. Without it, a simple visit to a cardiologist or a same-day knee procedure could be entirely out-of-pocket.

2. Emergency Services

Covers emergency room visits whether or not the ER is in your plan's network. This is critical: under ACA rules, your insurer can't charge you more for going to an out-of-network ER during a genuine emergency than they'd charge at an in-network one. You still pay your cost-sharing (copay, deductible, coinsurance), but the network penalty disappears.

3. Hospitalization

Inpatient care — being admitted to a hospital for surgery, serious illness, or recovery. This includes room and board, nursing care, and facility fees during the stay. Without hospitalization coverage, a three-day hospital admission could cost tens of thousands of dollars with zero insurance help.

4. Maternity and Newborn Care

Prenatal visits, labor and delivery, postpartum care, and newborn care right after birth. This was one of the most glaring pre-ACA gaps — many individual plans excluded maternity entirely or sold it as an expensive add-on rider. Now it's baked in automatically, which matters whether you're planning a pregnancy or not, since surprises happen.

5. Mental Health and Substance Use Disorder Services

Covers outpatient therapy, psychiatric services, inpatient mental health treatment, and substance use disorder treatment including medication-assisted therapy for opioid addiction. The ACA pairs this with the Mental Health Parity and Addiction Equity Act, which means your plan generally can't impose stricter limits on mental health visits than it does on comparable medical visits.

6. Prescription Drugs

Every marketplace plan must cover at least one drug in every category and class defined by the United States Pharmacopeia. Plans use formularies (tiered drug lists) to organize covered medications, and your cost-sharing varies by tier. This doesn't mean every drug you take is covered at the same cost — but it does mean your plan must offer meaningful drug coverage, not zero. For people managing chronic conditions, this category often determines the real monthly cost of a plan more than the premium does.

7. Rehabilitative and Habilitative Services and Devices

Rehabilitative services help you recover lost function — physical therapy after a stroke, occupational therapy after an injury. Habilitative services help people develop or maintain function they may have never had — therapy for a child with developmental delays, for example. Both, along with devices like crutches, braces, and prosthetics, must be covered. Habilitative services were nearly nonexistent in pre-ACA individual plans.

8. Laboratory Services

Blood tests, biopsies, diagnostic imaging ordered by your doctor, and other lab work. Routine labs tied to preventive care (like a cholesterol panel at your annual wellness visit) are often covered at zero cost-sharing. Diagnostic labs ordered because of a symptom typically count toward your deductible and cost-sharing.

9. Preventive and Wellness Services and Chronic Disease Management

This is arguably the most valuable category for healthy people. ACA-compliant plans must cover a specific list of preventive services at no cost to you — no copay, no deductible applied — when delivered by an in-network provider. That includes annual wellness visits, colonoscopies, mammograms, certain vaccines, blood pressure screening, and more. Chronic disease management programs for conditions like diabetes or hypertension also fall here.

Note: A 2023 Supreme Court ruling (Braidwood v. Becerra) created some legal uncertainty around the no-cost preventive care mandate. As of now, most plans continue to cover these services at no cost, but it's worth checking your plan's Summary of Benefits if you rely on specific screenings. Reading your plan's Summary of Benefits and Coverage document is the best way to confirm.

10. Pediatric Services, Including Oral and Vision Care

Children's dental and vision care are included here — one of the few places where the ACA requires dental and vision coverage explicitly. Adult dental and vision are NOT required EHBs, which is why most marketplace plans don't include them for adults. But if you have kids, their dental checkups and eye exams must be covered (though you may still have separate cost-sharing for pediatric dental).

What EHBs Don't Guarantee

Knowing the ten categories is useful. Knowing their limits is equally important, because there are some things people commonly assume EHBs provide that they don't.

• They don't set cost-sharing amounts. A plan can cover mental health therapy and still charge you $60 per session as a copay. Covered doesn't mean free.
• They don't require every drug or every specific service. Within each category, plans have flexibility. A plan might not cover the exact brand-name drug you're taking. Always check the formulary before enrolling.
• They don't apply to grandfathered plans. If your employer has kept the same plan design continuously since before March 23, 2010, it may be exempt from EHB rules. These are rare now but still exist.
• They don't cover adult dental or vision. Despite being in the pediatric category, dental and vision are only mandated for children. Adults need to purchase separate dental or vision policies.
• They don't apply to short-term health plans. Short-term plans are not ACA-compliant and can exclude any or all EHBs freely. If you're comparing a marketplace plan to a short-term option, you're not comparing equivalent products. See how marketplace plans stack up against other coverage types in our comparison of marketplace vs. employer-sponsored insurance.

If you want to see exactly how a specific plan handles each EHB category, pull up its Summary of Benefits and Coverage (SBC) — every ACA plan must provide one in a standardized format. Our guide on reading a marketplace plan's SBC walks you through it section by section.

How to Use This Information When Choosing a Plan

Since every marketplace plan includes all ten EHBs, you shouldn't use the presence of EHBs as a differentiator when comparing plans — they're a baseline, not a selling point. What varies meaningfully between plans is how those benefits are structured:

• Deductible: How much you pay before the plan picks up most costs. A Bronze plan might have a $7,000 deductible. A Platinum plan might have $500.
• Cost-sharing within categories: A mental health copay on one Gold plan might be $30; on another Gold plan it might be $50.
• Formulary tier placement: Your medication might be Tier 1 (generic, cheap) on one plan and Tier 3 (preferred brand, much more expensive) on another.
• Network breadth: A narrow HMO network might technically cover physical therapy but have only two in-network PT providers in your county.

The practical move: identify which EHB categories you actually use regularly. If you're managing a chronic condition, focus hard on the prescription drug formulary and any chronic disease management benefits. If you have young kids, look closely at pediatric dental cost-sharing. If mental health services matter to your household, compare therapy copays and annual visit limits across plans.

Once you've picked a plan, our guide on getting the most out of your ACA marketplace plan covers how to actually use these benefits effectively — from preventive care scheduling to coordinating prescriptions across the year.

You can also explore what's covered under most health plans more broadly, since some services go beyond EHBs depending on your specific plan.