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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.”

new and noteworthy
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–Commonwealth Fund Survey: Most Primary Care Providers Report Seeing More Medicaid or Newly Insured Patients Since January 2014, But Little Change in Ability to Provide Quality Care

    News Release

    As with the Public, Physicians' Views on Affordable Care Act Split Along Party Lines The first in a series of reports on a comprehensive new survey finds most primary care doctors, nurse practitioners, and physician assistants report an increase in Medicaid or newly insured patients since the Affordable Care Act's (ACA) major coverage provisions took…

  • Year Two of the ACA Coverage Expansions: On-the-Ground Experiences from Five States

    Issue Brief

    This brief provides an on-the-ground view of ACA implementation after completion of the second open enrollment period. It is based on 40 in-person interviews conducted in five states that have made different implementation choices, including three states (Colorado, Kentucky, and Washington) that have developed a State-based Marketplace and adopted the Medicaid expansion and two states (Utah and Virginia) that rely on the Federally-facilitated Marketplace (FFM) for enrollment of individuals into qualified health plans (QHPs) and that have not adopted the Medicaid expansion to date. The interviews were conducted by the Kaiser Family Foundation’s Commission on Medicaid and the Uninsured and Perry Undem Research/Communication with a range of stakeholders in each state, including Medicaid and Marketplace officials, consumer advocates, assisters, and hospital and community health center representatives, during April and May 2015. The report presents key findings related to enrollment systems; enrollment and renewal; outreach, marketing, and enrollment assistance; and access to and utilization of care. It concludes with key priorities identified by stakeholders looking ahead.

  • Analysis of 2016 Premium Changes and Insurer Participation in the Affordable Care Act’s Health Insurance Marketplaces

    Issue Brief

    This analysis provides an early look at premium changes for individuals in the health insurance marketplaces, created under the Affordable Care Act (ACA), in major cities in 10 states plus DC. Premium changes for the benchmark silver plans vary significantly across the sample cities. The benchmark rates will increase 4.4 percent on average in 2016 without accounting for tax credits, a relatively modest amount but greater than the average increase for 2015.

  • More Than Four in Ten Uninsured Don’t Know Basic Health Insurance Terms, Fewer Understand Complex Coverage Concepts

    News Release

    Kaiser Family Foundation Provides Consumer Resources to Fill Knowledge Gaps as the Second Open Enrollment Period Nears for the Affordable Care Act’s Marketplaces With open enrollment for the Affordable Care Act’s health insurance marketplaces days away, findings from a new Kaiser Family Foundation survey suggest that some people who stand to benefit from the law…

  • Change in Benchmark Silver Premiums, 2014 – 2015

    Feature

    Change in Benchmark Silver Premiums 2015 MAP_HI_and_MA.ppt Download Source Kaiser Family Foundation analysis of data from Healthcare.gov and insurer rate filings to state regulators. For more information see  “Analysis of 2015 Premium Changes in the Affordable Care Act’s Health Insurance Marketplaces” Sept. 2014.

  • Mapping Marketplace Enrollment

    Interactive

    This interactive zip code tool and map displays enrollment in the Health Insurance Marketplaces as a share of the potential market in small geographic areas across the country.

  • Key Findings on Medicaid Managed Care: Highlights from the Medicaid Managed Care Market Tracker

    Report

    This report highlights 10 key findings on the Medicaid managed care market, based on analysis of data included in the Kaiser Family Foundation's Medicaid Managed Care Market Tracker. The findings provide a partial profile of the Medicaid MCO market nationally and by state. They also illuminate the involvement of large, multi-state health insurance companies in the Medicaid market and the participation of these firms in other markets as well, including the managed long-term services and supports market, the new ACA marketplaces, and the Medicare Advantage market. Finally, these selected highlights serve to illustrate the array of ways the Tracker can be used to understand more about the Medicaid managed care market and its place in the broader market.

  • Assessing the Performance of the U.S. Health System

    Issue Brief

    Health spending growth has consistently outpaced U.S. economic growth and is higher than medical spending in other wealthy countries. Despite spending more, the United States doesn't have better health outcome in terms of life expectancy, mortality rates and other measures. This brief provides an overview of trends in health costs and the performance of the U.S. health system, including comparisons to countries from the Organisation for Economic Co-operation and Development (OECD). The brief charts growth in the nation's per capita health spending along with the recent slowdown, touching on the roles of expanded Medicaid eligibility, increases in Medicare beneficiaries and the Affordable Care Act (ACA). Additionally, it discusses the health system's effectiveness and capacity to provide services, including the accessibility and affordability of care.