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The ACA Marketplace

2025 KFF Marketplace Enrollees Survey

About one in three ACA enrollees said they would be “very likely” to look for a lower-premium Marketplace plan If their premium payments doubled, according to a KFF survey conducted in 2025.

New AND NOTEWORTHY

Tracking the Public’s Views on the ACA

While overall opinion of the Affordable Care Act has been more favorable than unfavorable since 2017, there remain deep partisan divides. See how public opinion on the ACA has changed from the inception of the law to the present. This interactive tool highlights key moments when views shifted and trends based on party identification, income, age, gender, and race/ethnicity.

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  • Poll Finds 62% of Americans Approve of the Supreme Court’s Decision to Continue Allowing ACA Health Insurance Subsidies in All States, While 32% Disapprove

    News Release

    Public’s View of the Health Care Law Remains Nearly Evenly Divided Immediately Following King v. Burwell Ruling Nearly Eight in 10 Americans Expect More Major Battles about the ACA in the Future Just over six in 10 Americans (62%) say they approve of the U.S. Supreme Court’s decision last week to continue allowing low- and moderate-income people in all states to be eligible for government subsidies to buy health plans through Affordable Care Act (ACA)…

  • Explaining Texas v. U.S.: A Guide to the 5th Circuit Appeal in the Lawsuit Challenging the Affordable Care Act 

    News Release

    The outcome of the Texas v. U.S. legal challenge to the Affordable Care Act (ACA) could have far-reaching consequences for the nation’s health system, from rolling back the expansion of Medicaid to removing protections for people with pre-existing conditions and revoking the ability of adult children to stay on their parents’ insurance plans up to age 26. In December, U.S. District Judge Reed O’Connor invalidated the entire ACA after finding the individual mandate unconstitutional. Today,…

  • KFF Health Tracking Poll – July 2019: The Future of the ACA and Possible Changes to the Current System, Preview of Priorities Heading Into 2nd Democratic Debate

    Feature

    This month's KFF Health Tracking Poll explores public opinion towards a government-administered public option, and finds that attitudes can change after hearing common arguments. The poll also examines the public's views toward Medicare-for-all and the Affordable Care Act, as well as the top issues for Democrats ahead of the second round of presidential debates.

  • Testimony: Pre-Existing Conditions and Health Insurance

    Issue Brief

    KFF's Karen Pollitz testimony before the U.S. House Committee on Ways and Means on Jan. 29, 2019 examines the prevalence of pre-existing conditions, the impact of the Affordable Care Act's prohibition against medical underwriting and other provisions aimed at stabilizing the insurance risk pool, and the trade-offs involved in relaxing those provisions. 

  • An Overview of State Approaches to Adopting the Medicaid Expansion

    Issue Brief

    State approaches to adopting the Affordable Care Act’s Medicaid expansion have varied greatly by state based on state law, the political context, or other factors. While it does not cover how every state has enacted the Medicaid expansion, this issue brief highlights some of the different approaches states have taken to adopt the Medicaid expansion. Each state’s circumstances are unique, and the actions taken by one state may not apply to another state’s circumstances.

  • Analysis: Marketplace Plans Denied an Average of Nearly One in Five Claims in 2017 with Wide Variations across Insurers

    News Release

    Healthcare.gov marketplace insurers denied nearly one out of every five claims (19%) submitted for in-network services in 2017, and enrollees only appeal a tiny share (0.5%) of those denied claims, a KFF analysis of recently released claims data finds. The analysis finds a huge variation across insurers, with average denial rates as low as 1 percent and as high as 45 percent. Denial rates also vary across states, though individual insurers in the same state…

  • If the Affordable Care Act is Struck Down, Nearly All Americans Would Be Affected in Some Way

    News Release

    The Affordable Care Act’s changes to the nation’s health care system are so widespread that nearly all Americans would be affected in some way if a federal judge’s decision ruling the entire law unconstitutional is upheld, according to a new analysis from KFF (the Kaiser Family Foundation). While the changes to the individual insurance market – including protections for people with pre-existing conditions, creation of insurance marketplaces, and premium subsidies for low and modest income…

  • Medicaid: What to Watch in 2019 from the Administration, Congress, and the States

    Issue Brief

    Medicaid, the provider of health insurance coverage for about one in five Americans and the largest payer for long-term care services in the community and nursing homes, continues to be a key part of health policy debates at the federal and state level. Important Medicaid issues to watch in 2019 include Medicaid expansion developments amid ongoing litigation about the ACA’s constitutionality as well as Medicaid demonstration waiver activities, including those focused on work requirements and…

  • KFF Health Tracking Poll – January 2019: The Public On Next Steps For The ACA And Proposals To Expand Coverage

    Feature

    This month's KFF Health Tracking Poll finds that about four in ten are aware of the federal judge's ruling that the ACA is no longer valid but once made aware, most disapprove of the ruling. This poll also examines the public's favorability toward expanding the role of public health care programs, and majorities across partisan groups have a favorable opinion of programs such as Medicare buy-in and Medicaid buy-in, with a national Medicare-for-all being less…