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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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  • Two Year Trends in Medicaid and CHIP Enrollment Data: Findings from the CMS Performance Indicator Project

    Issue Brief

    This brief provides an overview of recent trends in Medicaid and CHIP enrollment as of January 2016, based on data from the Centers for Medicare and Medicaid Services (CMS) produced as part of its Performance Indicator Project. The project was designed to provide timely data on Medicaid and CHIP eligibility and enrollment that are intended to help strengthen data-driven program management and oversight efforts at both the national and state level. They also provide insight into Medicaid and CHIP eligibility and enrollment experiences as the ACA is implemented. This brief examines data as of January 2016 to be able to look at two full years of data post implementation of the major coverage provisions in the Affordable Care Act (ACA).

  • Overview of Medicaid Per Capita Cap Proposals

    Issue Brief

    The House Republican Plan (“A Better Way”) released on June 22, 2016, includes a proposal to convert federal Medicaid financing from an open-ended entitlement to a per capita allotment or a block grant (based on a state choice). This proposal is part of a larger package designed to replace the Affordable Care Act (ACA) and reduce federal spending for health care. Often tied to deficit reduction, proposals to convert Medicaid’s financing structure to a per capita cap or block grant have been proposed before. Such changes represent a fundamental change in the financing structure of the program with major implications for beneficiaries, providers, states and localities. Key things to understand about a per capita cap include the following: how a per capita cap works, key design challenges, and implications of a per capita cap.

  • Medicare Advantage Hospital Networks: How Much Do They Vary?

    Report

    This report takes an in-depth look at Medicare Advantage plans’ hospital networks. The analysis draws upon data from 409 Medicare Advantage plans serving beneficiaries in 20 diverse counties that together accounted for about one in seven (14%) Medicare Advantage enrollees nationwide in 2015. The report examines the size and composition of plans’ hospital networks, the variation across counties, the inclusion of Academic Medical Centers and NCI-Designated Cancer Centers, and the relationship between network size and other plan features, including premiums, quality star ratings, per capita Medicare spending, parent organization, and plan tax status.

  • 8 Preguntas & Respuestas sobre Puerto Rico

    Fact Sheet

    La crisis de $73 mil millones de Puerto Rico ha sido tema de los medios de comunicación nacionales, y de debate en el Congreso en los últimos meses.

  • ACA Coverage Expansions and Low-Income Workers

    Issue Brief

    This brief highlights low-income workers and the impact of ACA coverage expansions on this population. Low-income workers may not have access to jobs that provide full-time, full-year employment or jobs with comprehensive benefit packages, including health insurance. Medicaid plays an important role in providing health coverage for low-income workers, and coverage expansions implemented under the ACA have produced substantial coverage gains for low-income workers and a corresponding reduction in the uninsured. However, low-income workers in non-expansion states with incomes too high for Medicaid but too low for subsidies in the Marketplace do not have an affordable coverage option and will likely remain uninsured.

  • Uncompensated Hospital Care Fell by $6 Billion Nationally in 2014, Primarily in Medicaid Expansion States; However Many Hospitals Worry About Future Changes in Medicaid Supplemental Payments

    News Release

    The Affordable Care Act’s coverage expansions have benefited hospitals financially, helping to produce an overall decline nationwide in uncompensated care from $34.9 billion to $28.9 billion in 2014, according to a new analysis by the Kaiser Family Foundation. Nearly all of the decline occurred in Medicaid expansion states, where uncompensated care costs were $10.