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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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  • Key Lessons from Medicaid and CHIP for Outreach and Enrollment Under the Affordable Care Act

    Issue Brief

    The Affordable Care Act (ACA) will significantly increase coverage options through an expansion of Medicaid and the creation of new health insurance exchange marketplaces. However, effective outreach and enrollment efforts will be key to ensuring that new coverage opportunities translate into increased coverage. Based on a review of existing research, this brief identifies five key lessons learned through previous Medicaid and CHIP experience to help inform outreach and enrollment under the ACA. The brief is…

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

    Fact Sheet

    This state report explains how the ACA expands coverage in North Dakota, 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 North Dakota are eligible for Medicaid or financial…

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

    Fact Sheet

    This state report explains how the ACA expands coverage in Vermont, 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 Vermont are eligible for Medicaid or financial assistance in…

  • Express Lane Eligibility Efforts: Lessons Learned from Early State Cross-Program Enrollment Initiatives

    Issue Brief

    The Children's Health Insurance Program Reauthorization Act of 2009 (CHIPRA) provides states new options to reach and enroll eligible but uninsured low-income children into Medicaid and CHIP. The law's Express Lane Eligibility (ELE) provisions enable state Medicaid and CHIP agencies to identify, enroll and recertify children by relying on eligibility findings from other programs, such as Head Start or Food Stamps, rather than having to re-analyze eligibility under their own rules. Further, CHIPRA authorizes greater…

  • Health Affairs Article: Medicaid Expansion Under Health Reform May Increase Service Use and Improve Access For Low-Income Adults With Diabetes

    Issue Brief

    This analysis finds that Medicaid’s role in financing diabetes care will grow when many low-income uninsured people with diabetes become eligible for Medicaid as the program expansions under the Affordable Care Act in 2014. Adult Medicaid beneficiaries with diabetes had annual per person health expenditures more than three times higher than adult beneficiaries without the disease -- $14,229 versus $4,568, according to the study. At the same time, many uninsured adults with diabetes are less…

  • Using Data and Technology to Drive Process Improvement in Medicaid and CHIP: Lessons From South Carolina

    Fact Sheet

    In the past year, there has been a notable trend of states increasingly utilizing data and technology to modernize, streamline, and gain efficiencies in their Medicaid and CHIP programs. The expanded use of data and technology is not only helping states deal with current budget pressures and decreased administrative resources, but also lays important groundwork for the coverage expansions and new coordinated, streamlined, and technology-driven enrollment process that will go into effect in 2014 under…

  • Immigrants’ Access to Health Care

    Issue Brief

    Immigrants account for 20 percent of the uninsured. There are many reasons for immigrants' lack of coverage, but the welfare reform law of 1996 was significant in restricting Medicaid eligibility for certain immigrant populations. The Kaiser Commission on Medicaid and the Uninsured has produced new reports on immigrant health care: a chart pack highlighting statistics and a policy brief discussing the legal status of Medicaid eligibility. An issue paper summarizing the findings of immigrant focus…