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Uninsured

Data and analysis

The coverage gap exists because some states did not expand Medicaid under the ACA to cover adults under age 65 without dependent children with incomes at/below 138% of the federal poverty level (FPL)

How Many Uninsured Are in the Coverage Gap?

An estimated 1.4 million uninsured individuals in the 10 states without Medicaid expansion, including many working adults, people of color, and those with disabilities, remain in the "coverage gap," ineligible for Medicaid or for ACA tax credits that would make coverage affordable.

The Uninsured and Health Coverage

This Health Policy 101 chapter examines the share of the United States population who are uninsured, highlighting their demographics and the challenges they face because of the lack of coverage.

Key Facts on Health Coverage of Immigrants

This fact sheet provides an overview of health coverage for immigrants based on data from the 2023 KFF/LA Times Survey of Immigrants. As of 2023, half of likely undocumented immigrant adults and one in five lawfully present immigrant adults reported being uninsured.

New and noteworthy

Affordability Is the Issue Now, But Look for the Uninsured to Make a Comeback

A new column on the uninsured from President and CEO Dr. Drew Altman explains: “The uninsured is not the most politically salient problem in health care now, that’s affordability, nor is it the non-problem some say it is. But it’s coming back. And the problem of the chronically ill uninsured is glaring.” Read more.

Key Facts about the Uninsured Population

The number and share of people without insurance grew in 2024, increasing for the first time since 2019, according to KFF’s analysis of data from the American Community Survey (ACS). This issue brief describes trends in health coverage in 2024, examines the characteristics of the uninsured population , and summarizes the access and financial implications of not having coverage.

More on the uninsured population >>

Who was uninsured in 2024?

Latest Polling
9.8%

The share of people under age 65 without insurance
62%

The share of uninsured adults who said they were uninsured because coverage is not affordable
59%

The share of uninsured adults who said they or someone living with them had problems paying for health care
39%

The share of uninsured adults who reported delaying or not getting needed care or medication due to cost
Other key facts about the uninsured >>

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  • What’s the Political Power of Those Newly Insured Under Obamacare?

    News Release

      With 17 million people newly-insured since 2014, Drew Altman's latest column for The Wall Street Journal's Think Tank takes a look at whether they will make an impact in the first presidential election since Affordable Care Act enrollment began. All previous columns by Drew Altman are online.

  • Briefing: Medicaid and CHIP Eligibility and Enrollment in 2016, and a Look Ahead: Findings from a 50-State Survey

    Event Date:
    Event

    At 9:30 a.m. ET on Thursday, January 21, the Kaiser Family Foundation hosted a public briefing to present findings from our 14th annual 50-state survey of Medicaid and CHIP eligibility, enrollment, renewal, and cost-sharing policies. The survey, conducted by the Foundation’s Kaiser Commission on Medicaid and the Uninsured (KCMU) and Georgetown University’s Center for Children and Families, provides new data on states’ Medicaid eligibility and enrollment policies, which have undergone significant change in the two…

  • 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.

  • New KFF Focus Groups Reveal Medicaid Enrollee Experiences During Unwinding

    News Release

    Over six months after the expiration of pandemic-era enrollment protections, at least 27 million Medicaid enrollees—or roughly one-in-three enrollees across the country—have completed their state’s eligibility renewal process for the program. Over 18 million people have had their coverage renewed and over 10 million have been disenrolled, as of November 8, 2023. New KFF focus groups look beneath the numbers at the experiences of enrollees who have gone through the Medicaid renewal process. Drawing from…

  • With More than Half of Medicaid Enrollees Awaiting their Renewal Process, New Report Highlights Lessons Learned that Can Inform State Efforts and Reduce Disenrollments for “Procedural” Reasons

    News Release

    At the beginning of 2024, nine months into states’ efforts to unwind the Medicaid continuous enrollment provision and reverify enrollees’ eligibility, states have completed renewals for less than half of all enrollees. To gain a better understanding of what challenges states are facing and the effects of different unwinding strategies, KFF interviewed state Medicaid officials in Arizona, Indiana, and Pennsylvania, as well as others involved, including representatives from Medicaid, managed care plans, legal aid organizations,…

  • Nearly a Quarter of People Who Say They Were Disenrolled from Medicaid During the Unwinding Are Now Uninsured   

    News Release

    Nearly a quarter (23%) of adults who say they were disenrolled from Medicaid since early 2023 report being uninsured now, finds a new KFF national survey examining how the unwinding affected enrollees.  Overall, 19% of adults who had Medicaid prior to the start of unwinding say they were disenrolled at some point in the past year. Of this group, a large majority (70%) were left at least temporarily uninsured, while 30% already had another form…

  • Change in February effectuated enrollment, by state, 2025-2026

    How Has ACA Marketplace Enrollment Changed Across States in 2026?

    Issue Brief

    Following several years of rapid enrollment growth in the Affordable Care Act (ACA) Marketplaces that corresponded with temporary enhanced premium tax credits, enrollment fell for the first time in seven years in 2026, when those tax credits expired. Every state except for New Mexico saw a drop in ACA Marketplace enrollment from 2025 to 2026. State-based Marketplaces that run their own enrollment platforms, including those that partially offset the expiring federal enhanced tax credits, generally…

  • Where ACA Marketplace Enrollment is Growing the Fastest, and Why

    Policy Watch

    In 2024, Affordable Care Act (ACA) Marketplace enrollment hit a new record high, reaching over 21 million people. This policy watch discusses the the factors contributing to the increased enrollment in the fastest growing marketplaces.