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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.

New AND NOTEWORTHY

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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  • Interactive Maps: Estimates of Enrollment in ACA Marketplaces and Medicaid Expansion

    Interactive

    As the 115th U.S. Congress deliberates the future of the Affordable Care Act, also known as Obamacare, an interactive map from the Kaiser Family Foundation provides estimates of the number of people in each congressional district who enrolled in a 2017 ACA marketplace health plan and the political party of each district’s representative as of October 2017. The analysis also includes maps charting the total number of people enrolled under the ACA Medicaid expansion in…

  • Key Issues in Children’s Health Coverage

    Issue Brief

    This brief reviews children’s coverage today and examines what is at stake for children’s coverage in upcoming debates around CHIP funding, repeal and replacement of the ACA, and Medicaid restructuring.

  • ACA Medicaid Expansion Drove Nationwide Increase in Health Coverage for People with HIV, First National Analysis Finds

    News Release

    As Congress moves to repeal the Affordable Care Act, a new analysis from the Kaiser Family Foundation provides the first national estimates of changes in health coverage for people with HIV since the law was implemented. It finds that rolling back the law’s Medicaid expansion could significantly impact coverage for people with HIV. Nationwide, Medicaid coverage for people with HIV in care rose six percentage points between 2012 to 2014, when ACA coverage expansions took…

  • The Cost of the Individual Mandate Penalty for the Remaining Uninsured

    Issue Brief

    This analysis provides estimates of the share of uninsured people eligible to enroll in the Affordable Care Act marketplaces who will be subject to the individual mandate penalty, and how those penalties are increasing for 2016. It also provides estimates of the number of people who could have a zero-dollar contribution or pay less for health insurance than the penalty, due to premium subsidies, and the number of people who would pay more for a…

  • Few Uninsured Know Date of Pending Deadline for Obtaining Marketplace Coverage; Many Say They Will Get Coverage Soon, Though Cost is a Concern

    News Release

    Most Democrats Like Medicare-for-All, But Very Few Say the Issue Will Drive Their Votes in the 2016 Elections Similar to Last Month, More Hold Unfavorable Views of the ACA than Favorable Ones The Affordable Care Act's third open enrollment period will end on Jan. 31, but the latest Kaiser Health Tracking Poll finds that only a small share of people without health insurance realize it. Just 7 percent of the uninsured correctly identify January as…

  • Surprise Medical Bills

    Issue Brief

    This brief explores the problem of "surprise medical bills" -- charges arising when an insured individual inadvertently receives care from an out-of-network provider. It reviews studies on the extent of the issue, including Kaiser Family Foundation polling data, and outlines state and federal policy responses, including rules and proposed rules for Medicare and plans in Affordable Care Act marketplaces.

  • A Guide to Understanding Medicaid Expansion Waivers as States Debate What to Do Under the ACA

    News Release

    With the recent governors’ elections in Kentucky and Louisiana refocusing attention on state Medicaid expansion decisions, a newly updated issue brief from the Kaiser Family Foundation provides an overview of the waivers obtained by six states – Arkansas, Iowa, Michigan, Indiana, New Hampshire and Montana -- that are pursuing alternative Medicaid expansions under the Affordable Care Act.

  • How Affordable Care Act Repeal and Replace Plans Might Shift Health Insurance Tax Credits

    Issue Brief

    The Affordable Care Act, also known as Obamacare, and leading replacement proposals rely on refundable tax credits to help individual market enrollees pay for premiums, although the credit amounts are set quite differently. This analysis compares estimates of an average 2020 tax credit amount under the ACA with averages under the House Republicans' American Health Care Act, introduced March 6, 2017.