What Does Health Insurance Cover? A Complete Guide to Benefits, Exclusions & Plan Types

Health insurance paperwork can be genuinely confusing, with benefit summaries, acronyms, and cost-sharing rules that vary from one plan to the next. If you have ever looked at an Explanation of Benefits and wondered why a particular service was not covered, that is a common experience.

This guide breaks down what health insurance covers by law, what it typically excludes, and how to find out exactly what your specific plan includes, covering newer topics like weight-loss medications and fertility treatments. If you want to talk through your options with a physician, find a doctor near you who can help you make the most of your benefits.

---

At a Glance

---

Section 1: The 10 Essential Health Benefits Every ACA Plan Must Cover

All individual and small-group health plans sold on or off the Marketplace, including plans purchased through HealthCare.gov, must cover a defined set of services established under the Affordable Care Act (ACA). According to HealthCare.gov, these 10 Essential Health Benefits (EHBs) are the legal minimum for compliant plans:

1. Ambulatory patient services: outpatient care including doctor visits, same-day surgery, and urgent care
2. Emergency services: ER visits, including out-of-network facilities in a genuine emergency
3. Hospitalization: inpatient care, surgical procedures, and overnight stays
4. Pregnancy, maternity, and newborn care: prenatal visits, labor, delivery, and postnatal care
5. Mental health and substance use disorder services: therapy, inpatient psychiatric treatment, and addiction treatment
6. Prescription drugs: at least one drug in each category must be covered; the specific formulary varies by plan
7. Rehabilitative and habilitative services and devices: physical therapy, occupational therapy, speech therapy, and equipment such as wheelchairs
8. Laboratory services: blood tests, biopsies, imaging, and diagnostic panels
9. Preventive and wellness services and chronic disease management: covered at no cost under ACA rules (see Section 2)
10. Pediatric services, including oral and vision care: dental and vision for children under 19; adult dental and vision are not included

One important nuance: large, self-insured employer plans, which cover the majority of Americans with employer-sponsored insurance, are not required by federal law to follow EHB rules. Many still offer comparable or broader benefits, but there is no federal mandate. Checking your plan's Summary of Benefits and Coverage document will confirm what applies to you.

---

Section 2: Preventive Care — Covered at $0 on Most ACA Plans

Preventive care is one of the most frequently overlooked benefits in health insurance. According to HealthCare.gov, non-grandfathered ACA plans must cover a set of preventive services at no cost-sharing, meaning no copay, no deductible, and no out-of-pocket cost, when you see an in-network provider.

Covered preventive services for adults include:

• Annual wellness visit with a primary care physician
• Blood pressure screening
• Cholesterol and lipid screening
• Colorectal cancer screening (colonoscopy) starting at age 45
• Mammography screening for women
• Cervical cancer screening (Pap smear)
• Depression screening
• Diabetes screening for adults with certain risk factors
• Lung cancer screening for eligible adults aged 50 to 80 who smoke
• Vaccinations, including flu shots, hepatitis vaccines, and shingles vaccine for adults over 50
• Obesity counseling
• Contraceptive methods and counseling for women

These benefits apply to services recommended with an "A" or "B" grade by the U.S. Preventive Services Task Force (USPSTF). The $0 cost rule applies only when you visit an in-network provider for the preventive service specifically. If a doctor finds a problem during a preventive visit and shifts to diagnosing or treating it, cost-sharing may apply to the diagnostic portion of the visit.

Not sure which preventive screenings apply to your age and health history? A primary care physician can review your specific profile and guide you on timing.

---

Section 3: Mental Health and Therapy Coverage

Mental health care is a required benefit on ACA plans, but the details of what gets covered, and how much you will pay, vary more than most people realize.

Federal Parity Law

The Mental Health Parity and Addiction Equity Act (MHPAEA) is a federal law that prohibits group health plans and insurers from placing more restrictive financial requirements or treatment limits on mental health and substance use disorder (MH/SUD) benefits than they apply to comparable medical or surgical benefits. According to CMS, the law applies to most group health plans and individual health insurance coverage.

In practical terms: if a plan covers unlimited primary care visits, it cannot impose a 20-session annual cap only on therapy visits.

What Mental Health Coverage Typically Includes

• Individual outpatient therapy (psychologist, licensed therapist, licensed clinical social worker)
• Psychiatry visits, including medication management
• Inpatient psychiatric hospitalization
• Intensive outpatient programs (IOP) and partial hospitalization programs (PHP)
• Substance use disorder treatment
• Crisis intervention services

The In-Network Gap for Therapy

Coverage and access are two different things. A practical challenge for many patients is that therapists who provide talk therapy are less likely to participate in insurance networks than psychiatrists who manage medications. Patients who see an out-of-network therapist are typically reimbursed at a lower rate and pay a higher share of the cost themselves.

Before booking an appointment, verify that the provider is in-network by checking your insurer's online directory. If you are looking for a mental health professional who participates with your plan, Momentary Lab's provider search can help you locate one.

Does Health Insurance Cover Marriage Counseling?

Marriage counseling or couples therapy is generally not covered by health insurance because it is not classified as treatment for a diagnosed mental health condition. Some plans may cover sessions if one participant has a documented diagnosis such as depression or anxiety and the therapist is billing for the treatment of that condition. A doctor can advise on individual cases.

---

Section 4: Dental and Vision — Usually Not Included for Adults

Standard health insurance does not include adult dental or vision benefits as a default, which many people discover when they first try to use their coverage.

What the ACA Requires (and Does Not Require)

According to HealthCare.gov, pediatric dental and vision care is an essential health benefit, meaning plans must cover it for enrollees under 19. For adults, dental and vision coverage is not an ACA requirement, and most individual and small-group plans exclude it by default.

Does Health Insurance Cover Eye Exams?

Routine eye exams for prescription glasses or contacts are generally not covered under standard medical plans for adults. Eye exams related to a medical condition, such as diabetes-related retinal exams or glaucoma screening, may be covered under the medical plan because they fall under preventive care or chronic disease management. Routine vision coverage, including exams, glasses, and contact lenses, is typically offered through a separate stand-alone vision plan.

Does Health Insurance Cover Cataract Surgery?

Cataract surgery is generally covered by medical health insurance because cataracts are a diagnosed medical condition. The surgery itself, anesthesia, and post-operative visits are typically covered subject to normal cost-sharing including deductibles and coinsurance. The cost of premium lens implants designed to reduce dependence on glasses is generally an elective upgrade paid out of pocket.

Does Health Insurance Cover Braces?

Orthodontic treatment, including braces, is not covered for adults under standard health insurance. Some dental plans include an orthodontia benefit with a lifetime maximum, commonly around $1,000 to $2,000, and that benefit is tied to the dental plan rather than the medical plan. Pediatric orthodontia coverage varies by state and plan.

Does Health Insurance Cover Dental Implants and Oral Surgery?

Dental implants are excluded from standard medical health insurance and are typically considered an elective dental procedure. Some dental insurance plans offer partial coverage after a waiting period.

Oral surgery coverage depends on the nature of the procedure. Medically necessary oral surgery, for example removal of a cyst, jaw reconstruction following an accident, or biopsy of a suspicious lesion, may be covered under the medical plan. Wisdom teeth removal depends on circumstance: if performed due to a documented medical problem such as impaction causing infection or nerve involvement, some medical plans may cover it; if elective or preventive, it typically falls under dental benefits.

Does Health Insurance Cover Hearing Aids?

Hearing aids are not a federally required benefit under the ACA for adults. A limited number of states mandate coverage, and some employer plans voluntarily include it. Medicare Part B does not cover hearing aids, although some Medicare Advantage plans do. A doctor can advise on what hearing-related services may be covered under a specific plan.

Section 5: Cosmetic and Elective Procedures — Generally Excluded

Health insurance covers care that is medically necessary. Procedures performed primarily for appearance or convenience are excluded from standard coverage, with some narrow exceptions.

Does Health Insurance Cover LASIK?

LASIK eye surgery, which corrects refractive errors such as nearsightedness or astigmatism, is considered elective because glasses and contacts are available alternatives. Standard health and vision insurance plans do not cover LASIK. Some vision plans offer discounted pricing at network providers, but that is a discount arrangement rather than insurance coverage.

A limited medical necessity exception may apply in cases where refractive surgery is the only viable correction for a patient's vision condition. A doctor can advise on individual cases.

Does Health Insurance Cover a Vasectomy?

Vasectomy coverage varies by plan. Under ACA rules, sterilization is covered as a preventive service for women, including tubal ligation. Male sterilization is not specifically listed as a federally mandated preventive service, but many plans cover it under general surgical benefits or as a family planning service. Checking the plan's Summary of Benefits and Coverage or calling member services will confirm whether it is covered.

---

Section 6: Car Accident Injuries — Health vs. Auto Insurance

Health insurance does cover injuries sustained in a car accident, but how it interacts with auto insurance depends on your state's rules and the auto coverage you carry.

How the Two Types of Insurance Work Together

In states with no-fault auto insurance laws, Personal Injury Protection (PIP), a required component of auto coverage in those states, is typically the primary payer for medical costs after an accident regardless of who caused it. Health insurance acts as secondary coverage once PIP benefits are exhausted.

In states without no-fault rules, the at-fault driver's liability insurance typically covers the injured party's medical bills. Health insurance may cover costs upfront while a liability claim is pending. The insurer may later seek reimbursement through a legal process called subrogation once a settlement is reached; this is a standard industry process and does not affect your right to treatment.

Medical Payments Coverage (MedPay), an optional add-on available in most states, covers emergency treatment, ambulance transport, and diagnostic costs without requiring fault to be established first.

Does Health Insurance Cover Ambulance Services?

Ambulance transport is an essential health benefit under the ACA, so ACA-compliant plans must cover it, subject to standard cost-sharing such as deductibles and coinsurance. Air ambulance transport for emergencies is covered, but air ambulance providers frequently operate outside insurance networks. The No Surprises Act, effective in 2022, extended billing protections to air ambulance transport for emergencies.

---

Section 7: Fertility Treatments and IVF — A Patchwork of State Laws

Fertility treatment, including in vitro fertilization (IVF), is not an ACA essential health benefit. There is no federal requirement for health plans to cover it.

State Mandates

Coverage depends heavily on where you live. According to KFF, 15 states have laws requiring certain health plans to cover at least some infertility treatments. A broader count that includes newer laws requiring insurers to offer, rather than automatically include, fertility coverage puts the number at approximately 25 states and Washington, D.C. as of 2025, though the depth and scope of those mandates vary significantly.

States with relatively comprehensive IVF coverage mandates include Illinois, Massachusetts, New Jersey, New York, Maryland, Connecticut, and the District of Columbia, among others.

Important Limitations

• Self-insured employer plans are generally exempt. State mandates do not apply to self-insured plans, which cover approximately 61% of workers with employer-sponsored insurance, according to KFF.
• Many mandates apply only to large group plans, not individual or small group plans.
• Eligibility criteria vary. Some states require one year of documented infertility, others limit coverage by age, and some historically restricted coverage based on marital status, though several states have updated their laws to be more inclusive.
• One IVF cycle typically costs between $15,000 and $30,000 including medications and genetic testing, according to GoodRx, which is why state mandates are consequential for access.

Reviewing your specific plan's documents, or speaking with your HR department if you have employer-sponsored insurance, is the most reliable way to confirm what applies to you.

---

Section 8: Weight-Loss Medications — Wegovy, Zepbound, and GLP-1 Coverage

GLP-1 receptor agonist medications, including semaglutide (Ozempic and Wegovy) and tirzepatide (Mounjaro and Zepbound), rank among the most searched health insurance topics in 2025 and 2026. Coverage is highly variable and continuing to change.

What Health Insurance Covers Wegovy and Zepbound?

Private and employer plans: There is no federal mandate requiring employer plans to cover GLP-1 medications for weight loss. According to SHRM's 2025 Employee Benefits Survey, 23% of U.S. employers covered GLP-1 drugs for type 2 diabetes or weight management in 2025. Coverage decisions vary by employer and often come with conditions such as a documented BMI threshold, prior authorization, enrollment in a structured weight-management program, or step therapy requiring a less expensive medication be tried first.

GLP-1s prescribed for type 2 diabetes management, including Ozempic and Mounjaro, have more consistent coverage than those prescribed solely for weight loss, such as Wegovy and Zepbound.

Medicare: Medicare Part D currently does not cover GLP-1 medications prescribed solely for weight loss. However, CMS announced in December 2025 a Medicare GLP-1 Bridge program scheduled to launch in July 2026, which will provide eligible Medicare Part D beneficiaries access to certain GLP-1 drugs at approximately $50 per month. Full Medicare Part D coverage through the BALANCE Model is expected no earlier than January 2027.

Medicaid: Coverage varies by state. Some state Medicaid programs cover GLP-1s for qualifying patients; others do not.

How to Check Your Formulary

The most direct way to find out if a specific drug is covered is to look up your plan's drug formulary, the list of covered medications and their cost tiers. Most insurers make this searchable on their member portal. You can also call the member services number on your insurance card and ask specifically whether a drug is on-formulary and what tier it falls under.

---

Section 9: Alternative and Complementary Care — Plan-Dependent Coverage

Does Health Insurance Cover Chiropractic Care?

Chiropractic care is not a specifically listed essential health benefit under the ACA. Coverage depends on the state's benchmark plan and whether chiropractic care is a state-mandated benefit. Many marketplace plans include chiropractic coverage, typically limited to a set number of visits per year when the care is medically necessary. Maintenance chiropractic care for general wellness is generally not covered.

Physical therapy is more reliably covered because rehabilitation and habilitative services are explicitly listed as an ACA essential health benefit. Annual visit limits still apply, with the specific number determined by the state benchmark plan.

Does Health Insurance Cover Rehab?

Inpatient and outpatient substance use disorder rehabilitation is covered under the mental health and substance use disorder essential health benefit, subject to parity rules. Inpatient rehab for physical recovery following an injury, stroke, or surgery is covered under rehabilitative services. Length-of-stay and visit limits apply and are determined by medical necessity.

Does Health Insurance Cover a Dermatologist?

Dermatology is covered as specialty outpatient care under the ambulatory patient services essential health benefit. Medically necessary dermatology visits, including diagnosis and treatment of skin conditions, are covered. HMO plans typically require a referral from a primary care physician, while PPO plans generally allow direct specialist access. Cosmetic dermatology procedures such as Botox, cosmetic fillers, or aesthetic laser treatments are not covered.

Does Health Insurance Cover Acupuncture?

Acupuncture is not an ACA-mandated benefit but is included in a growing number of plans, partly because Medicare began covering acupuncture for chronic low back pain in 2020. Coverage under private plans varies, and checking the plan's Summary of Benefits and Coverage is the most reliable way to confirm.

---

Section 10: How to Find Out Exactly What Your Plan Covers

The most reliable way to understand your specific coverage is to read three documents.

1. Summary of Benefits and Coverage (SBC)

The SBC is a standardized, plain-language document that every health plan is required to provide. It lists covered benefits, cost-sharing amounts, and common examples of what you would pay for specific services. You can request it from your insurer or, if you have employer-sponsored insurance, from your HR or benefits department.

2. Explanation of Benefits (EOB)

After you receive care, your insurer sends an EOB showing what the provider charged, what the plan paid, and what you owe. An EOB is not a bill; it is a record. Reading EOBs helps confirm whether claims were processed correctly.

3. Full Plan Document (Certificate of Coverage or Evidence of Coverage)

The complete policy document contains the detailed exclusions and limitations that the SBC summarizes. If a specific service is unclear from the SBC, the full document provides the definitive answer.

Practical Tips Before Any Appointment

• Call member services before a non-emergency procedure and ask specifically whether the service is covered, whether a referral or prior authorization is required, and whether the provider is in-network.
• Write down the date, time, and name of the representative you spoke with, along with any reference number provided.
• If a claim is denied, request the specific denial reason in writing. Most plans allow one or more levels of internal appeal, followed by a right to external independent review.

Not sure which plan covers the services you need? An AI healthcare navigator can help you think through your options before your next enrollment period.

---

Frequently Asked Questions

Does health insurance cover therapy? Yes. Mental health therapy is a required benefit under the ACA and must be covered no more restrictively than medical care under the Mental Health Parity and Addiction Equity Act. Out-of-pocket costs can still be significant if the therapist is out-of-network, because many therapists do not participate in insurance networks.

Does health insurance cover eye exams? Routine eye exams for glasses or contacts are generally not covered under standard medical plans for adults. Eye exams related to a medical condition such as diabetic retinal exams may be covered under the medical benefit. Routine vision care is typically covered under a separate stand-alone vision plan.

Does health insurance cover wisdom teeth removal? Coverage depends on why the removal is being performed. If wisdom teeth are causing a documented medical problem such as infection or nerve involvement, some medical plans may cover the extraction. Routine or preventive removal typically falls under dental coverage.

Does health insurance cover car accidents? Yes. Health insurance covers medically necessary treatment for injuries sustained in a car accident. In no-fault states, auto insurance PIP coverage usually pays first, with health insurance acting as secondary coverage. Subrogation may apply once a liability settlement is reached; this is a standard process between insurers.

Does health insurance cover chiropractic care? It depends on your plan and state. Chiropractic care is not a federal essential health benefit, but many plans include it as a state-mandated or optional benefit, usually limited to a set number of medically necessary visits per year.

Does health insurance cover a dermatologist? Yes. Dermatology is covered as specialty outpatient care. HMO plans may require a referral. Cosmetic dermatology procedures are excluded.

Does health insurance cover hearing aids? Generally, no. Hearing aids are not a federally required adult benefit. Some state mandates and certain employer or Medicare Advantage plans include coverage. A doctor can help identify what hearing-related services may be covered under a specific plan.

Does health insurance cover LASIK? LASIK is considered elective and is not covered by standard medical or vision plans. Some vision plans offer discounted rates at network providers. Medical necessity exceptions require physician documentation.

Does health insurance cover braces? Orthodontic treatment is not covered under standard medical plans for adults. Some dental plans include an orthodontia benefit with a lifetime maximum. Coverage for children varies by plan and state.

Does health insurance cover IVF? IVF is not a federal essential health benefit. Coverage depends on your state and plan type. As of 2025, 15 to 25 states and Washington, D.C. require some fertility coverage for certain plans, but self-insured employer plans are generally exempt from state mandates.

Does health insurance cover oral surgery? Medically necessary oral surgery, such as treatment for infection, trauma, or biopsy, may be covered under the medical plan. Elective and cosmetic oral surgery typically requires dental coverage.

Does health insurance cover a vasectomy? Coverage varies by plan. Vasectomy is not federally mandated as a preventive benefit for men, but many plans cover it as a surgical or family planning benefit. Reviewing the plan's SBC will confirm whether and how it is covered.

Does health insurance cover marriage counseling? Marriage or couples counseling is generally not covered because it is not classified as treatment for a diagnosed mental health condition. Some plans may cover sessions when one participant has a documented diagnosis being treated in that context. A doctor can advise on individual cases.

Does health insurance cover ambulance services? Ambulance transport is an essential health benefit under the ACA, so ACA-compliant plans must cover it subject to cost-sharing. Air ambulance transport in emergencies is covered, and the No Surprises Act (2022) extended billing protections to emergency air transport.

Does health insurance cover gym membership? No. Gym memberships are not a covered insurance benefit. Some plans offer wellness incentive programs or gym discounts as supplemental perks, but these are outside the core benefit structure.

Does health insurance cover rehab? Substance use disorder rehabilitation is covered as an ACA essential health benefit. Inpatient physical rehabilitation following injury or surgery is covered under rehabilitative services. Medical necessity criteria determine the scope and duration of coverage.

Does health insurance cover dental implants? Dental implants are excluded from standard medical health insurance. They are generally treated as a restorative dental procedure requiring dental coverage, typically with significant remaining out-of-pocket costs.

Does health insurance cover abortion? Coverage varies widely by state, plan type, and whether the plan receives federal funding. Some states prohibit state-regulated plans from covering abortion; others require it. Federal plans and Medicaid have separate rules. Checking specific plan documents is the most reliable way to confirm coverage in any given state.

Does health insurance cover vision? Routine adult vision care, including eye exams, glasses, and contacts, is not an ACA essential health benefit and is typically available through a separate stand-alone vision plan. Pediatric vision care is covered as an ACA essential health benefit for enrollees under 19. Medical eye conditions such as glaucoma and diabetic retinopathy may be covered under the standard medical plan.

What health insurance covers Wegovy? Coverage for Wegovy (semaglutide for weight management) varies by plan. Some employer plans cover it with prior authorization and BMI criteria. Medicare does not currently cover Wegovy solely for weight loss, though the Medicare GLP-1 Bridge program launching in July 2026 will expand access for eligible Part D beneficiaries. Checking your plan's formulary is the most direct way to confirm.

What health insurance covers Zepbound? Zepbound (tirzepatide for weight management) follows similar coverage rules to Wegovy. Private employer plan coverage is available in some plans and generally requires prior authorization. Medicare coverage for weight loss is limited but expanding under the 2026 CMS demonstration program.