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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.

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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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  • Public Reporting of Quality Outcomes: What’s the Best Path Forward?

    Event Date:
    Event

    The Affordable Care Act aims to promote higher quality care in part by rewarding – and eventually requiring – the reporting of certain quality measures. Previous efforts suggest that public reporting can add significant value. Yet there are concerns about the best way to measure outcomes and quality, the possible unintended effects of public reporting, and whether purchasers and consumers actually use the information to make choices. Panelists at this April 27 briefing co-sponsored by…

  • Controlling Health Insurance Premiums: Perspectives from the States, the Federal Government and Industry

    Event Date:
    Event

    The Affordable Care Act creates a process for states and the Department of Health and Human Services to review “unreasonable” premium increases and provide information to consumers about the process. The rules governing this rate review process went into effect September 1, 2011. This briefing by the Kaiser Family Foundation, held on September 22, 2011, addressed how these new rules might work and what the implications may be for the growth in health insurance premiums…

  • Health Affairs Article: Medicaid Expansion Under Health Reform May Increase Service Use and Improve Access For Low-Income Adults With Diabetes

    Issue Brief

    This analysis finds that Medicaid’s role in financing diabetes care will grow when many low-income uninsured people with diabetes become eligible for Medicaid as the program expansions under the Affordable Care Act in 2014. Adult Medicaid beneficiaries with diabetes had annual per person health expenditures more than three times higher than adult beneficiaries without the disease -- $14,229 versus $4,568, according to the study. At the same time, many uninsured adults with diabetes are less…

  • A Guide to the Supreme Court’s Affordable Care Act Decision

    Issue Brief

    This policy brief describes the Supreme Court's decision on the Affordable Care Act and looks ahead to the implementation of health reform now that questions about the constitutionality of the law have been resolved. Brief (.pdf)

  • Ten Changes to Watch in Open Enrollment 2022

    Issue Brief

    Even as the ninth annual Open Enrollment period gets underway, the Affordable Care Act (ACA) Marketplaces continue to evolve and important changes are expected. This issue brief discusses what changes to watch out for in the coming enrollment period.

  • 2021 Health Insurance Marketplace Calculator

    Interactive

    The Health Insurance Marketplace Calculator, updated with 2021 premium data and to reflect subsidies in the American Rescue Plan Act of 2021, provides estimates of health insurance premiums and subsidies for people purchasing insurance on their own in health insurance exchanges (or “Marketplaces”) created by the Affordable Care Act (ACA). With this calculator, you can enter your income, age, and family size to estimate your eligibility for subsidies and how much you could spend on…

  • More Than 6 in 10 of the Remaining 27.4 Million Uninsured People in the U.S. are Eligible for Subsidized ACA Marketplace Coverage, Medicaid or the Children’s Health Insurance Program

    News Release

    Recent policy attention has focused on efforts to reduce the number of uninsured people in the U.S. by expanding eligibility for coverage assistance, including enhanced premium subsidies in the Affordable Care Act (ACA) Marketplace and filling the Medicaid “coverage gap.” A new KFF analysis shows that a majority of the 27.4 million people who remained uninsured in 2020 already are eligible for financial assistance for coverage through Medicaid/CHIP or the Marketplace, suggesting that policies in…

  • Marketplace Insurers Denied Nearly 1 in 5 In-Network Claims in 2020, though It’s Often Not Clear Why

    News Release

    Healthcare.gov marketplace insurers denied nearly one out of every five claims (18%) submitted for in-network services in 2020, though why the denial rates are so high and the ultimate consequences for consumers are difficult to access from the publicly available data, a new KFF analysis finds. The Affordable Care Act requires insurers to report data about claims denials and appeals to encourage transparency about how insurance coverage works for enrollees. The analysis examines data released…