Health Insurance Marketplace
The Health Insurance Marketplace (exchange) created under the Affordable Care Act provides a centralized way for individuals, families, and small businesses to compare and buy private health insurance plans. Many states run their own marketplaces; where they do not, a federal exchange serves residents. The Marketplace aims to increase access to insurance and foster competition among insurers.
Key points
- Open to people who lack employer-sponsored coverage; not available to Medicare beneficiaries.
- Plans are grouped into metal tiers (bronze, silver, gold, platinum) that reflect the balance of premiums versus coverage.
- All Marketplace plans must cover a set of essential health benefits.
- Lower-income consumers may qualify for premium tax credits and cost-sharing reductions to lower monthly costs and out-of-pocket expenses.
- Special enrollment periods exist for qualifying life events.
How the Marketplace works
Insurers offer plans through a state or the federal Marketplace so consumers can compare options in one place. Enrollment typically occurs during an annual open enrollment period; if you experience a qualifying life event (for example: birth or adoption of a child, marriage, loss of other coverage), you may be eligible for a special enrollment period to sign up outside the regular window. Small businesses can also use a Marketplace option to shop for employer-sponsored coverage through the Small Business Health Options Program (SHOP).
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Eligibility
To use the individual Marketplace you generally must:
* Live in the United States.
 Be a U.S. citizen or national (or meet other immigration status requirements).
 Not be enrolled in Medicare.  
Eligibility for premium tax credits and other savings depends on household income and family size.
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Plan categories and required benefits
Marketplace plans are organized into four metal tiers based on average cost-sharing:
* Bronze — lower monthly premiums, higher out-of-pocket costs; covers roughly 60% of expected costs.
 Silver — moderate premiums and cost-sharing; often the level that works best with cost-sharing reductions.
 Gold — higher premiums, lower out-of-pocket costs.
* Platinum — highest premiums, lowest out-of-pocket costs; covers the largest share of expenses.
All plans sold through the Marketplace must cover the following essential health benefits:
* Ambulatory (outpatient) services
 Emergency services
 Hospitalization
 Laboratory services
 Mental health and substance use disorder services
 Maternity and newborn care
 Prescription drugs
 Preventive and wellness services and chronic disease management
 Pediatric services (including dental and vision for children)
* Rehabilitative and habilitative services and devices
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Note: Large employer-sponsored plans are not bound by Marketplace essential-benefit rules in the same way; the Marketplace influences coverage choices through market competition.
Financial help
People with low to moderate incomes may qualify for:
* Premium tax credits — reduce monthly insurance premiums.
* Cost-sharing reductions (CSRs) — reduce deductibles, copayments, and other out-of-pocket costs; CSRs apply only if you enroll in a silver-level plan.
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Recent federal actions have expanded subsidy eligibility compared with the program’s original design, increasing affordability for more middle-income households.
Choosing a plan
When comparing Marketplace plans, consider:
* Monthly premium versus expected annual out-of-pocket costs (deductible, copays, coinsurance).
 Provider network and whether your preferred doctors and hospitals are included.
 Prescription drug coverage and formularies.
* Out-of-pocket maximums and how often you expect to use care.
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Special considerations
Policy changes over time have altered incentives and protections—for example, the federal penalty for lacking coverage was eliminated for most people, and subsidy rules have been modified to broaden financial assistance. State-level decisions affect how the Marketplace operates locally, so check the exchange available in your state or the federal site for current enrollment windows, plan options, and financial-assistance rules.