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How Much and Why ACA Marketplace Premiums Are Going Up in 2026

This analysis of initial rate filings from all 50 states and DC shows ACA Marketplace insurers are proposing a median premium increase of 18% for 2026, more than double last year’s 7% median proposed increase. The analysis includes proposed rate changes by state and insurer.

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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  • Kaiser Health Security Watch

    Feature

    The Kaiser Health Security Watch uses Kaiser Health Tracking Poll data to measure the public's health care-related problems and worries, including problems paying medical bills, skipping or delaying health care due to cost, and worrying about their future ability to pay for care and keep insurance.

  • How Will Health Reform Impact Young Adults?

    Issue Brief

    Adults ages 19 to 29 have the highest uninsured rate of any age group in the United States. The 13.7 million uninsured people in this age group comprise nearly a third of the overall uninsured population.

  • Uninsured Quiz

    Feature

    The number of uninsured people in the United States has received increased attention since the enactment of the Affordable Care Act in 2010. How much do you know about the uninsured population and the consequences of not having coverage? Take our quiz.

  • The New Health Reform Law and Young Adults

    Event Date:
    Event

    Young adults have some of the highest uninsurance rates in America. In 2008, three in 10 uninsured Americans – almost 14 million people – were between 19 and 29 years of age. The new health reform law requires insurers to allow dependent children to remain on their parents’ plans until age 26.

  • Health Affairs Article: Health Care in New Orleans Before and After Hurricane Katrina

    Issue Brief

    On the first anniversary of Hurricane Katrina’s landfall, a paper authored by Foundation staff, released as a web exclusive by the journal Health Affairs, examines the impact of the storm on New Orleans, the current state of health care in the city, and lessons learned about the city’s health care delivery system.

  • Kaiser Health Tracking Poll: March 2013

    Feature

    Three years after the passage of the Affordable Care Act, the March 2013 Kaiser Health Tracking Poll finds that a majority of Americans are unsure how the law will impact them, and few are paying attention to the details of state-level decisions about implementation.

  • The Affordable Care Act and Insurance Coverage in Rural Areas

    Issue Brief

    Rural populations face disparities compared to metropolitan populations in health care. While rural individuals were not more likely to be uninsured than metropolitan counterparts pre-Affordable Care Act, they were poorer and less likely to have private insurance. With coverage changes in the ACA involving an expansion of Medicaid for poor and near-poor populations, decisions by states with large rural populations may cause rural residents to have disparate access to coverage, which may exacerbate cost and access barriers to health care.

  • Uncompensated Care for the Uninsured in 2013: A Detailed Examination

    Report

    This report provides estimates of spending for uncompensated care, in 2013, just before implementation of health reform’s major coverage provisions. The report estimates the amount of uncompensated care provided, analyzes the site of care for uncompensated services, and details sources of funding for uncompensated care. These estimates provide an important baseline against which to measure major changes that are occurring under the ACA.