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New and noteworthy

2025 KFF Marketplace Enrollees Survey

If the amount they pay in premiums doubled, about one in four enrollees in ACA Marketplace health plans say they would “very likely” go without insurance in 2026, finds a KFF survey of Marketplace enrollees fielded shortly after open enrollment began in the first weeks of November 2025. One in three say they would be “very likely” to look for a lower-premium Marketplace plan.

Health Coverage Among Community Health Center Patients, 2019-2024

Community Health Center Patients, Financing, and Services

Changes to Medicaid and the ACA Marketplace included in the 2025 reconciliation law and the expiration of ACA Marketplace enhanced premium tax credits at the end of 2025 are likely to increase the number of uninsured patients and patients who cannot afford out-of-pocket costs, placing new financial burdens on community health centers.

Data and analysis

The Uninsured Population 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.

How Many Uninsured Are in the Coverage Gap?

This analysis estimates that 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 tax credits that would make coverage ACA's Marketplaces affordable to them.

Key Facts about the Uninsured Population

The number of people ages 0-64 who were uninsured held steady at 25.3 million in 2023, although the number of uninsured children rose from 3.8 million to 4.0 million. Most uninsured people are in low-income families and have at least one worker in the family.

How the Unwinding Affected Enrollees

Over half who were disenrolled say they put off needed medical care while trying to renew Medicaid. 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.

The uninsured: How costs affect care and health, 2023

Latest Polling
8%

Percent of adults who reported not having health insurance
55%

Percent of uninsured adults who reported delaying or forgoing some form of health care due to cost
19%

Percent of uninsured adults who report that they or a family member had difficulty paying medical bills
38%

Percent of uninsured adults who reported not having a usual source of care (vs. 8% of insured adults)
Peterson-KFF Health System Tracker

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  • How Many People Might Lose Medicaid When States Unwind Continuous Enrollment?

    Issue Brief

    Between 8 and 24 million people across the U.S. could be disenrolled from Medicaid during the unwinding of the program’s continuous enrollment provision. KFF's new analysis offers three illustrative scenarios for how state-level Medicaid enrollment could decline between March 2023 and May 2024, ranging from 8 percent to 28 percent of total enrollees. 

  • Eliminating the ACA: What Could It Mean for Medicaid Expansion?

    Policy Watch

    The debate over filling the Supreme Court seat previously held by Ruth Bader Ginsburg has brought renewed attention to the possibility of the Affordable Care Act (ACA) being overturned under the court challenge in California v. Texas, currently scheduled to be heard shortly after the election this November. The expansion of Medicaid was a central component of the ACA, and 39 states have now adopted the ACA expansion into their Medicaid programs. Because Medicaid is administered by states, under federal guidelines, there may be some confusion about how overturning the federal law would affect state Medicaid programs.

  • Analysis Examines the Affordable Care Act’s Impact on Nearly All Americans

    News Release

    A week after the 2020 elections, the Supreme Court is scheduled to hear arguments on a legal challenge, supported by the Trump administration, that seeks to overturn the Affordable Care Act, an outcome that would have major effects throughout the health care system as the law’s provisions have affected nearly all Americans in some way.

  • The Inequity Of The Medicaid Coverage Gap and Why It Is Hard To Fix It

    Perspective

    In this column for the JAMA Health Forum, Larry Levitt explores why the Medicaid "coverage gap" still exists in 12 states that have not expanded their Medicaid programs under the Affordable Care Act, why it matters, and why eliminating it could prove challenging.

  • Kaiser Health Policy Tracking Poll: December 2014

    Feature

    With many of the Affordable Care Act’s (ACA) major provisions taking effect this past year, the December Kaiser Health Tracking Poll finds that many Americans are aware of the main parts of the law and, with the exception of the individual mandate, at least 6 in 10 feel favorably towards them. The poll finds the vast majority of the uninsured don’t know the deadline to enroll, most expect to get health insurance in the next few months, and nearly two-thirds say they don’t think they’ll have to pay a fine, or don’t know if they will, for not having coverage this year.

  • JAMA Forum: Why Health Insurance Literacy Matters

    Perspective

    Larry Levitt's November 2014 post looks at the challenges with people not understanding basic health insurance concepts as millions of them evaluate and choose health plans during open enrollment season for insurance in 2015.