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The ACA Marketplace

2025 KFF Marketplace Enrollees Survey

In 2025, 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.

Cost Concerns and Coverage Changes: A Follow-Up Survey of ACA Marketplace Enrollees

Following the expiration of the enhanced premium tax credits for people with Affordable Care Act (ACA) Marketplace plans, a new KFF follow-up survey of the same Marketplace enrollees KFF surveyed in 2025 finds half (51%) of returning enrollees say their health care costs are “a lot higher” this year compared to last year, including four in 10 who specifically say their premiums are “a lot higher.”

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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

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

ANALYSIS

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

Timely insights and analysis from KFF staff

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  • A Historical Review of How States Have Responded to the Availability of Federal Funds for Health Coverage

    Issue Brief

    This historical review finds that the availability of federal funds has served as an effective incentive for states to provide health coverage to meet the health and long-term care needs of their low-income residents despite state budget pressures. The brief examines the history of earlier experiences and provides important context for how states may respond as they weigh the costs and benefits of expanding their Medicaid programs in 2014 as called for under the Affordable…

  • How Five Leading Safety-Net Hospitals Are Preparing For The Challenges and Opportunities of Health Care Reform

    Report

    This study, published in the journal Health Affairs, examines how five leading safety-net hospitals are preparing for major changes expected to result from the Affordable Care Act (ACA), including less government support for uncompensated care and the need to compete for newly insured people. The hospitals studied are Bellevue Hospital Center in New York City; Denver Health Medical Center in Colorado; Parkland Health and Hospital System in Dallas; San Francisco General Hospital in California; and…

  • A Guide to the Supreme Court’s Decision on the ACA’s Medicaid Expansion

    Issue Brief

    On June 28, 2012, the U.S. Supreme Court issued its decision in the case challenging the Affordable Care Act (ACA). The Court upheld the constitutionality of the ACA's individual mandate, which requires most people to maintain a minimum level of health insurance coverage beginning in 2014. A majority of the Court also found the ACA's Medicaid expansion unconstitutionally coercive of states, while a different majority of the Court held that this issue was fully remedied…

  • Implementing the ACA’s Medicaid-Related Health Reform Provisions After the Supreme Court’s Decision

    Issue Brief

    On June 28, 2012, the U.S. Supreme Court upheld the constitutionality of the Affordable Care Act (ACA). A majority of the Court also found the ACA’s Medicaid expansion unconstitutionally coercive of states, while a different majority of the Court held that this issue was fully remedied by limiting the Health and Human Services (HHS) Secretary’s enforcement authority. The practical effect of the Court's decision makes the Medicaid expansion optional for states. This brief addresses questions…

  • July Kaiser Health Tracking Poll: A Focus On The Mandate and the Medicaid Expansion in the Aftermath of the Supreme Court Decision

    Perspective

    This second July poll reports in further depth on public opinion about the Affordable Care Act (ACA) in the wake of the Supreme Court decision. The Supreme Court’s decision that the individual mandate was constitutional as a tax appears to have had little impact on opinion about the already largely unpopular requirement that most people have health coverage or potentially face a penalty. Sixty-six percent of the public view the mandate negatively when it is…

  • Health Insurance Exchanges: Can States and the Federal Government Meet the Deadline?

    Event Date:
    Event

    The Alliance for Health Reform and the Commonwealth Fund sponsor a July 27 briefing to discuss how states are facing implementation and evaluation deadlines in regards to health insurance exchanges. Speakers will explore such questions as: What needs to happen between now and January 2014 for states to successfully implement exchanges and other aspects of health reform? What are options for states if they fail to meet the upcoming November deadline for declaring their exchange…

  • Community Health Centers: Can They Plug the Gaps in the Safety Net?

    Event Date:
    Event

    The Alliance for Health Reform and the Centene Corporation sponsored a July 23 briefing to discuss the role of community health centers (CHCs) in providing care to vulnerable populations as employer-sponsored coverage declines and demand for safety-net services increase. Panelists addressed questions such as: How are states and safety-net systems planning for 2014 and the challenges and opportunities presented under the ACA? Is there sufficient federal oversight of their operations? For more information, please visit…

  • Story Ideas: Impact of the Supreme Court Decision on Health Reform

    Event Date:
    Event

    The Alliance for Health Reform and the Robert Wood Johnson Foundation sponsored this reporters-only briefing to help journalists assess the Supreme Court's decision about the Patient Protection and Affordable Care Act. Full version: Video   Speakers for this session: The panel was moderated by Ed Howard of the Alliance. John R. Lumpkin, Senior Vice President and Director, Health Care Group, Robert Wood Johnson Foundation Alan Weil, National Academy for State Health Policy Michael Cannon, Cato Institute…

  • Summary of Coverage Provisions in the Patient Protection and Affordable Care Act

    Issue Brief

    This short summary describes the health coverage provisions contained in the final version of the Affordable Care Act signed into law in March 2010, including the individual mandate requirements, expansion of public programs, health insurance exchanges, changes to private insurance and employer requirements.

  • Health Care After the Supreme Court Decision: What’s Next?

    Event Date:
    Event

    The Alliance for Health Reform and the Kaiser Family Foundation discuss the recent Supreme Court ruling on the constitutionality of the health reform law. Panelists explore such questions as: What does the court's ruling mean for those without health insurance? Will states that choose to participate in the Medicaid expansion be ready to cover nearly all non-disabled adults under age 65 with household incomes at or below 133 percent of the federal poverty level as…