The Affordable Care Act, commonly called Obamacare, requires all Marketplace health insurance plans to cover 10 categories of essential health benefits. These range from doctor visits and hospital stays to prescription drugs, mental health care, and maternity services. Beyond these core categories, ACA plans include a set of preventive services at no out-of-pocket cost, along with protections that prevent insurers from denying coverage or charging more based on your health history.
The 10 Essential Health Benefits
Every plan sold through the Health Insurance Marketplace must cover these 10 categories of services:
- Outpatient care: doctor visits, specialist appointments, and services you receive without being admitted to a hospital.
- Emergency services: emergency room visits, including at out-of-network hospitals.
- Hospitalization: inpatient care, including surgery and overnight stays.
- Pregnancy and newborn care: prenatal visits, labor, delivery, and care for your baby after birth.
- Mental health and substance use services: therapy, counseling, inpatient treatment, and substance use disorder programs.
- Prescription drugs: at least one drug in every category and class on the plan’s formulary.
- Rehabilitative services and devices: physical therapy, occupational therapy, speech therapy, and equipment like wheelchairs.
- Lab services: blood tests, imaging, and diagnostic work.
- Preventive and wellness services: screenings, immunizations, and chronic disease management.
- Pediatric services: children’s dental and vision care (covered for those under 19).
The exact services within each category can vary by state, since states set their own benchmark plans that define the specific details. But every Marketplace plan must cover all 10 categories, regardless of which metal tier (Bronze, Silver, Gold, Platinum) you choose. The tier affects how much you pay out of pocket, not what’s covered.
Preventive Care at No Cost
One of the most practical benefits of ACA coverage is a broad set of preventive services you can get without paying a copay, coinsurance, or deductible. This applies when you use an in-network provider. Covered preventive services fall into three groups: those for all adults, those specifically for women, and those for children.
For adults, this includes blood pressure screening, cholesterol checks, depression screening, diabetes screening for those at risk, and immunizations like flu shots and hepatitis B vaccines. Colorectal cancer screening, HIV screening, and lung cancer screening for high-risk individuals are also covered at no cost. Women’s preventive services include mammograms, cervical cancer screening, well-woman visits, and breastfeeding support. Children’s preventive care covers developmental assessments, vision screening, hearing tests, and the full childhood immunization schedule. You pay nothing for these services as long as your provider is in-network, even if you haven’t met your annual deductible.
Birth Control Coverage
Marketplace plans must cover FDA-approved contraceptive methods prescribed by a provider, with no copay or coinsurance when you use an in-network provider. This includes hormonal methods like birth control pills and vaginal rings, implanted devices like IUDs, barrier methods like diaphragms, emergency contraception, sterilization procedures, and patient counseling. Plans are not required to cover drugs that induce abortions or male reproductive services like vasectomies.
Maternity and Newborn Care
All Marketplace and Medicaid plans cover pregnancy and childbirth as an essential health benefit. This is true even if your pregnancy began before your coverage started. Coverage includes prenatal care, labor and delivery, and postpartum services for both the mother and newborn. Before the ACA, many individual insurance plans excluded maternity care entirely or sold it as an expensive add-on. That’s no longer allowed.
Mental Health and Substance Use Treatment
ACA plans must cover mental health services and substance use disorder treatment, and federal parity law requires that these benefits be on equal footing with medical and surgical benefits. In practical terms, this means your plan can’t charge higher copays for a therapy visit than it would for a comparable medical office visit. It also can’t impose visit limits on mental health care that don’t apply to other types of care.
This parity requirement extends to all the ways a plan might restrict access. The processes used for prior authorization, the standards for medical necessity reviews, and the criteria for provider network inclusion all have to be comparable to what the plan applies to physical health services. If your plan covers inpatient care for a medical condition, it has to cover inpatient mental health and addiction treatment on similar terms.
Pre-Existing Conditions
Before the ACA, insurance companies routinely denied coverage or charged significantly higher premiums to people with conditions like diabetes, asthma, cancer, or a history of pregnancy. That practice is now illegal. Insurers cannot refuse to cover you, charge you more, or limit benefits based on any health condition you had before your coverage began. Once you’re enrolled, they also cannot refuse to cover treatment for a pre-existing condition.
This protection applies to both adults and children. The only exception is “grandfathered” health plans, which are plans that existed before the ACA was signed in 2010 and have not made significant changes to their benefits or cost structure since then. These plans are increasingly rare.
No Lifetime or Annual Dollar Limits
ACA-compliant plans cannot cap how much they’ll spend on your essential health benefits in a given year or over your lifetime. Before the law, it was common for plans to set lifetime limits of $1 million or $2 million. Someone with cancer, a premature baby in the NICU, or a serious injury could hit that ceiling and lose coverage when they needed it most. Lifetime limit protections apply to all individual and employer-sponsored plans, including grandfathered plans. Annual limit protections apply to most plans, though grandfathered individual plans are exempt.
Insurers can still set dollar limits on services that fall outside the essential health benefits, such as adult dental work or cosmetic procedures.
Children’s Dental and Vision
Pediatric dental and vision care are essential health benefits, meaning all Marketplace plans must cover them for children. Dental coverage for children includes services to prevent disease, restore oral health, and treat emergencies. These benefits cannot be subject to annual or lifetime dollar limits. Vision coverage for children is also required and typically includes eye exams and corrective lenses.
Adult dental and vision care are a different story. They are not classified as essential health benefits, so Marketplace plans are not required to include them. Some plans offer them as add-ons, and you can purchase standalone dental or vision plans through the Marketplace, but coverage is not guaranteed.
What Obamacare Does Not Cover
While ACA plans are comprehensive, there are gaps. Adult dental and vision care are the most notable exclusions. Elective cosmetic surgery, such as facelifts or rhinoplasty done for appearance rather than medical necessity, is not covered. Long-term care, like a nursing home stay, falls outside the scope of Marketplace plans. Weight management programs, back pain programs, and other specialized wellness services may be offered by some plans but are not required.
Your specific plan may also exclude certain brand-name drugs if a generic equivalent is available, and it may require prior authorization for some services. Checking your plan’s summary of benefits before enrolling is the best way to understand exactly what’s included and what will cost you extra.