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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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  • Sizing Up Exchange Market Competition

    Issue Brief

    This issue brief offers an early look into how competitive the health insurance exchanges (also called marketplaces) are under the Affordable Care Act in selected states. Through analysis of enrollment data released by seven states (California, Connecticut, Minnesota, New York, Nevada, Rhode Island, and Washington) this brief finds that exchange markets in California and New York are shaping up to be more competitive than their individual markets were in 2012 while those of Connecticut and Washington show less competition (less even market share distribution). In several states, market concentration of individual insurers have shifted significantly compared to the individual market prior to the ACA, pointing to the potential for greater price competition in the future and the influence of new entrants to the market.

  • A Tale of Two Siblings, the ACA, and the Supreme Court

    From Drew Altman

    In a column published on The Huffington Post, Kaiser Family Foundation President and CEO Drew Altman shows how the U.S. Supreme Court’s decision to make the ACA Medicaid expansion a state option has upended the health insurance system for low and moderate income people in many states and discusses how the states and federal government can address the problem.

  • State Fiscal Conditions and Medicaid: 2014 Update

    Issue Brief

    This issue brief provides an overview of Medicaid financing, Medicaid’s role in state budgets, the relationship between Medicaid and the economy and how the ACA and the Medicaid expansion could affect state budgets.

  • The Affordable Care Act’s Impact on Medicaid Eligibility, Enrollment, and Benefits for People with Disabilities

    Issue Brief

    Medicaid is an important source of health insurance coverage for people with disabilities. This issue brief explains how Medicaid eligibility and benefits for people with disabilities are affected by the Affordable Care Act (ACA) rules as of 2014. Marketplace rules are discussed to the extent that they relate to Medicaid eligibility determinations for people with disabilities.

  • Those Long Lines To Enroll In The ACA

    From Drew Altman

    In this Policy Insight, Kaiser Family Foundation President and CEO Drew Altman discusses the need for community based outreach to enroll the long term uninsured.

  • Retiree Health Benefits At the Crossroads

    Report

    This issue brief reviews recent trends and developments in employer-sponsored retiree health coverage and examines the impact of recent legislation, such as the Medicare drug benefit and the Affordable Care Act (ACA) on retiree health coverage. The report describes leading strategies employers have been pursuing or considering to limit costs for retiree health benefits. In addition, the report considers the potential implications of proposals aimed at reducing federal spending for retiree health coverage and costs.

  • Data Note: How Has the Individual Insurance Market Grown Under the Affordable Care Act?

    Issue Brief

    This data note examines changes in the individual insurance market under the Affordable Care Act. Through analysis of filings by insurers to state insurance departments, the Kaiser Family Foundation estimates that the number of people enrolled in the individual insurance market grew 40 percent from the end-of-year 2013 to the end-of-year 2014 and has likely continued growing in 2015 as well.

  • Medicaid Expansion, Health Coverage, and Spending: An Update for the 21 States That Have Not Expanded Eligibility

    Issue Brief

    Ever since the Supreme Court ruled in June 2012 that states could effectively choose whether or not to accept the Affordable Care Act’s expansion of Medicaid eligibility, that choice has been one of the most prominent and often one of the most contentious issues for states. In this report, we provide new projections of the impact of Medicaid expansion on health coverage, Medicaid enrollment, and costs in states that have not expanded Medicaid.