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Affordable Care Act

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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  • Kaiser Health Tracking Poll – June 2009

    Poll Finding

    The June Kaiser Health Tracking Poll finds remarkable stability in public opinion on health reform as Congressional committees begin to hone in on the details of their health reform bills and debate intensifies.

  • 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.

  • Explaining Health Reform: Key Changes in the Medicare Advantage Program

    Issue Brief

    This brief examines the changes in the 2010 health reform law affecting the Medicare Advantage program, which gives beneficiaries the option of enrolling in private insurance plans for their Medicare benefits, instead of the traditional fee-for-service program.

  • Optimizing Medicaid Enrollment: Spotlight on Technology

    Report

    The health reform law provides for a national expansion of Medicaid in 2014 that will extend eligibility to millions more low-income people, primarily uninsured adults. It also requires implementation of a coordinated system for determining eligibility for Medicaid and subsidized coverage in the new health insurance exchanges.

  • Understanding The Medicaid And CHIP Maintenance of Eligibility Requirements

    Fact Sheet

    This fact sheet examines the provisions in the Patient Protection and Affordable Care Act (ACA) that require states to maintain eligibility and enrollment standards for Medicaid and the Children's Health Insurance Program. These maintenance of eligibility (MOE) provisions were designed to keep Medicaid and CHIP coverage stable until coverage expands under the health reform law.

  • Uniform Coverage Summaries for Consumers

    Issue Brief

    This brief explains the proposed federal rule that requires private health plans to provide a short, easy-to-read uniform summary of benefits and coverage to all health insurance applicants and enrollees.

  • Financial Alignment Models for Dual Eligibles: An Update

    Issue Brief

    The nearly nine million dual eligibles who receive both Medicare and Medicaid benefits are a high cost, high need population, accounting for a disproportionate share of expenditures relative to their enrollment in both programs.