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Affordable Care Act

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POLLING

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.
DATA

ACA Marketplace Enrollment is Down in 2026—But All of the Data Isn’t in Yet

ANALYSIS

Higher Premium Payments or Higher Deductibles: The ACA's Tradeoffs

QUIZ

Test Your Knowledge of the Affordable Care Act

POLLING

Competition Increased in Individual Market But Fell in Fully Insured Group Markets

Enhanced Premium tax credits

2025 KFF Marketplace Enrollees Survey

If their premium payments double, about one in three ACA enrollees say they would be “very likely” to look for a lower-premium Marketplace plan.

Timely insights and analysis from KFF staff

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  • What Does the Outcome of the Midterm Elections Mean for Medicaid Expansion?

    Fact Sheet

    While not typically an election issue, Medicaid — particularly the Medicaid expansion created under the Affordable Care Act (ACA) — was an important issue in the 2018 midterm elections in a number of campaigns throughout the country. This fact sheet highlights key states in which the results of the 2018 midterm elections have implications for Medicaid adoption or implementation. States examined include those that had Medicaid expansion ballot initiatives as well as states that have not yet adopted or implemented expansion but elected governors who support Medicaid expansion. In these states that had gubernatorial races with implications for Medicaid expansion, it will be important to monitor changes in the composition of state legislatures, as governors in most states will need to work with their legislatures in order to adopt the expansion.

  • The New Health Care Agenda: Gridlock, Lots of Hearings

    From Drew Altman

    In an Axios column, Drew Altman analyzes what the midterm election means for the health policy agenda between now and 2020--mostly political positioning and gridlock in Congress, with most of the action affecting people in the states. 

  • Compare Medicare-for-all and Public Plan Proposals

    Interactive

    This side-by-side interactive compares 10 bills to expand public health coverage through Medicare-for-All, a public option and other approaches, that have been introduced in the current Congress. The interactive allows users to compare these proposals across a number of dimensions, including eligibility, benefits, cost sharing, provider payments, and more.

  • 2019 Premiums for ACA Silver Plans Will Be 16 Percent Higher Than They Would Have Been Absent the Repeal of the Individual Mandate, Expansion of Short-Term Plans and Loss of Federal Cost-Sharing Payments, Analysis Finds

    News Release

    Although 2019 premiums for plans in the Affordable Care Act marketplaces are flat or falling in many parts of the country, they would be substantially lower still if not for several Trump administration-backed changes to private insurance markets, finds a new KFF analysis.

  • Claims Denials and Appeals in ACA Marketplace Plans in 2023

    Issue Brief

    This brief analyzes federal transparency data released by the Centers for Medicare and Medicaid Services (CMS) on claims denials and appeals for non-group qualified health plans (QHPs) offered on HealthCare.gov in 2023. It finds that HealthCare.gov insurers denied nearly one out of every five claims (19%) submitted for in-network services. Information about the reasons for denials is limited, and few consumers appeal claims denials.

  • A 90% Cut to the ACA Navigator Program

    Quick Take

    Cutting funding for the trusted and impartial source of important information Navigators provide could have big impacts just as many consumers may need to re-evaluate their coverage options.

  • With or Without ACA Repeal, ACA and Medicaid Cuts are Looming

    Perspective

    In this JAMA Health Forum post, Executive Vice President Larry Levitt explores why the incoming Trump administration and Republican majorities in Congress are likely to pursue budget cuts in Medicaid and the Affordable Care Act and why such efforts are likely to boost the number of uninsured Americans.

  • Enrollment Growth in the ACA Marketplaces

    Policy Watch

    This analysis of enrollment in Affordable Care Act (ACA) Marketplace health plans finds a record 24.3 million people enrolled in 2025, more than double the total in 2020, with most of the growth occurring in states won by President Trump in the 2024 election. In six states, enrollment more than tripled from 2020 to 2025: Texas, Mississippi, West Virginia, Louisiana, Georgia, and Tennessee.

  • Quick Takes: Timely insights and analysis from KFF staff

    ACA Preventive Services at the Supreme Court

    Quick Take

    If the Court rules in favor of Braidwood, private health insurers would no longer be required to cover, without cost sharing, certain preventive services recommended by USPTF after 2010 when the ACA was enacted.