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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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  • A Guide to the Supreme Court’s Review of the Contraceptive Coverage Requirement

    Issue Brief

    This issue brief dissects the issues raised by the legal challenges to the Affordable Care Act’s requirement that private insurance plans include contraception as part of their coverage of preventive services for women. Over 40 for-profit corporations and over 40 nonprofit corporations have filed lawsuits claiming that the requirement to provide their employees with contraceptives violates their religious rights. On November 26, 2013, the Supreme Court agreed to hear two cases filed by for-profit corporations,…

  • The Impact of the Coverage Gap for Adults in States not Expanding Medicaid by Race and Ethnicity

    Issue Brief

    The Affordable Care Act (ACA) expansion of Medicaid to adults with incomes at or below 138% of the federal poverty level (FPL) effectively became a state option following the Supreme Court decision, creating a “coverage gap” for many poor uninsured adults in states that do not expand Medicaid. This brief examines the coverage gap by race and ethnicity.

  • The Numbers Behind “Young Invincibles” and the Affordable Care Act

    Perspective

    As enrollment statistics in the new health insurance marketplaces start to become available, there is a growing focus on whether the enrollment of so-called “young invincibles” will be sufficient to keep insurance markets stable. Enrollment of young adults is important, but not as important as conventional wisdom suggests since premiums are still permitted to vary substantially by age. Because of this, a premium “death spiral” is highly unlikely. Why does the age distribution of enrollees…

  • How Will the Uninsured in Ohio Fare Under the Affordable Care Act?

    Fact Sheet

    This state report explains how the ACA expands coverage in Ohio, including a breakdown of how many uninsured people are eligible for Medicaid, how many are eligible for financial assistance to help them buy private insurance in the new Marketplace and how many will not receive any financial assistance at all. The report also details, in specific dollar figures, the income levels at which people in Ohio are eligible for Medicaid or financial assistance in…

  • How Will the Uninsured in Missouri Fare Under the Affordable Care Act?

    Fact Sheet

    This state report explains how the ACA expands coverage in Missouri, including a breakdown of how many uninsured people are eligible for Medicaid, how many are eligible for financial assistance to help them buy private insurance in the new Marketplace and how many will not receive any financial assistance at all. The report also details, in specific dollar figures, the income levels at which people in Missouri are eligible for Medicaid or financial assistance in…

  • How Will the Uninsured in Arizona Fare Under the Affordable Care Act?

    Fact Sheet

    This state report explains how the ACA expands coverage in Arizona, including a breakdown of how many uninsured people are eligible for Medicaid, how many are eligible for financial assistance to help them buy private insurance in the new Marketplace and how many will not receive any financial assistance at all. The report also details, in specific dollar figures, the income levels at which people in Arizona are eligible for Medicaid or financial assistance in…

  • How Will the Uninsured in Colorado Fare Under the Affordable Care Act?

    Fact Sheet

    This state report explains how the ACA expands coverage in Colorado, including a breakdown of how many uninsured people are eligible for Medicaid, how many are eligible for financial assistance to help them buy private insurance in the new Marketplace and how many will not receive any financial assistance at all. The report also details, in specific dollar figures, the income levels at which people in Colorado are eligible for Medicaid or financial assistance in…

  • How Will the Uninsured in Illinois Fare Under the Affordable Care Act?

    Fact Sheet

    This state report explains how the ACA expands coverage in Illinois, including a breakdown of how many uninsured people are eligible for Medicaid, how many are eligible for financial assistance to help them buy private insurance in the new Marketplace and how many will not receive any financial assistance at all. The report also details, in specific dollar figures, the income levels at which people in Illinois are eligible for Medicaid or financial assistance in…