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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

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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  • Coverage of Preventive Services for Adults in Medicaid

    Issue Brief

    This brief highlights data from a survey of coverage of 42 recommended preventive services for adults in Medicaid fee-for-service programs as of October 2010. Medicaid programs must cover preventive services for children as part of the Early Periodic Screening, Diagnosis and Treatment (EPSDT) benefit, but generally are not required to cover such services for adults.

  • How Will Uninsured Children Be Affected By Health Reform?

    Issue Brief

    This brief examines uninsured children and how they could be affected by health reform, including estimates of how many might qualify for coverage under a Medicaid expansion, how many would be eligible for subsidies and how many would not be eligible for such help. Issue Brief (.

  • Status of State Medicaid Expansion Decisions

    Interactive

    This page displays an interactive map of the current status of state decisions on the Affordable Care Act's Medicaid expansion. Additional Medicaid expansion resources are listed (with links) below the map.

  • KFF Health Tracking Poll: Health Care Costs, Expiring ACA Tax Credits, and the 2026 Midterms

    Poll Finding

    Looking ahead to the midterm elections, health care costs are the public’s top economic concern, and many voters say the issue will have a major impact on their vote. On health care issues, including the cost of health care, voters currently trust Democrats more than Republicans, though neither party has an advantage on addressing the overall cost of living. Following the expiration of the ACA enhanced tax credits, two-thirds of the public say Congress did the “wrong thing” by not extending them.

  • The Effects of Medicaid Expansion under the ACA: Studies from January 2014 to January 2020

    Report

    This literature review summarizes findings from 404 studies of the impact of state Medicaid expansions under the ACA published between January 2014 (when the coverage provisions of the ACA went into effect) and January 2020. It includes studies, analyses, and reports published by government, research, and policy organizations using data from 2014 or later. This body of research suggests that the expansion presents an opportunity for gains in coverage, improvements in access and financial security, and economic benefits for states and providers.