Affordable Care Act

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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  • The Cost of Care with Marketplace Coverage

    Issue Brief

    This brief and accompanying slides examine cost sharing - deductibles, copayments and coinsurance - in 2015 insurance plans sold on the Affordable Care Act's (ACA) federally-facilitated marketplaces. The analysis looks at out-of-pocket limits, as well as cost sharing for hospital stays, physician visits, emergency room visits, and prescription drugs, for plans across the metal levels (platinum, gold, silver and bronze).

  • New Kaiser Survey Finds Eleven Million Newly Insured Adults As of Mid-December, But Nearly Half Who Remained Uninsured One Year After Full Implementation of the Affordable Care Act Were Eligible for Medicaid or Marketplace Tax Credits

    News Release

    Many Of The Remaining Uninsured Say They Didn’t Seek Coverage or Considered It Too Expensive, While Others Were Told (Or Believed) They Were Not Eligible About 11 million adults had become newly insured under the Affordable Care Act by mid-December 2014, according to a new national survey of more than 10,000 adults by the Kaiser Family Foundation.  Nearly half of the approximately 30 million adults who remained uninsured were eligible for assistance under the law,…

  • An Overview of New CMS Data on the Number of Adults Enrolled in the ACA Medicaid Expansion

    Issue Brief

    New preliminary data from the Medicaid Budget and Expenditure System (MBES) released by CMS details for the first time the number of adults enrolled in Medicaid under the new Affordable Care Act (ACA) Medicaid expansion category. This issue brief provides an overview of the new data as well as how it differs from the Performance Indicator data.

  • New Reports Analyze Cost Sharing in 2015 ACA Marketplace Plans in 37 States

    News Release

    Charts Examine Savings from Subsidies at Stake in U.S. Supreme Court Case Cost-sharing subsidies under the Affordable Care Act can substantially reduce deductibles and other cost sharing for people with low incomes purchasing coverage in the federally-facilitated insurance marketplace serving 37 states, a new analysis by the Kaiser Family Foundation finds. These government subsidies, which are also available in plans sold on state-run marketplaces, are different from premium tax credits. Both are at stake in…

  • The Health-Care Enrollment Story Is in the States

    From Drew Altman

    In this column for The Wall Street Journal's Think Tank, Drew Altman examines the variation among states beneath the national Affordable Care Act’s Marketplace enrollment numbers released by the Department of Health and Human Services.

  • Insurance Markets in a Post-King World

    Perspective

    This perspective addresses how insurance markets might respond if the US Supreme Court sides with the plaintiffs in the King v. Burwell case. The case challenges the legality of premium and cost-sharing subsidies for low- and middle-income people buying insurance in states where the federal government rather than the state is operating the marketplace under the Affordable Care Act (ACA).

  • New Kaiser Policy Insight and Issue Brief Examine Policy Implications and Legal Arguments in the U.S. Supreme Court’s King v. Burwell Case

    News Release

    With the Supreme Court set to hear oral arguments in King v. Burwell on March 4, a new Policy Insight from the Kaiser Family Foundation's Larry Levitt and Gary Claxton explores the policy implications for consumers and insurance markets if the Court were to side with the plaintiffs in the challenge to the Affordable Care Act’s consumer subsidies. A second issue brief by KFF’s MaryBeth Musumeci, a policy analyst and an attorney, explains the legal…

  • What New Data Tell Us About Doctor Choice

    From Drew Altman

    Drew Altman explores the rhetoric versus reality on whether choice of doctors is eroding and why the issue resonates with Americans, in this column for The Wall Street Journal's Think Tank.