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Affordable Care Act

The ACA MarketplaceS

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

How Has ACA Marketplace Enrollment Changed Across States in 2026?

ACA Marketplace enrollment fell this year in every state except New Mexico, which was the only state to fully replace the enhanced premium tax credits that expired last year with a state-funded subsidy, according to a new KFF analysis of effectuated enrollment data. The Marketplace enrollment decline—the first in seven years—follows several years of rapid enrollment growth and coincides with the end of the enhanced federal subsidies.

How Much and Why ACA Marketplace Premiums Are Going Up in 2027

ACA Marketplaces insurers are proposing a median premium increase of 15% in 2027, according to KFF’s updated analysis of 276 insurers with publicly available filings across all 50 states and the District of Columbia. This is the second consecutive year of double-digit premium hikes. Last year’s median nationwide proposed rate change was 18%, and the median finalized rate change was 20%. While this proposed rate change is lower than last year, it represents the second-highest requested rate change since 2018, as premium growth had been relatively flat in this market for several years.

About the ACA

Promotional image for KFF video How Affordable is the Affordable Care Act

Did the Affordable Care Act Make Health Care More Affordable?

The expiration of the ACA’s enhanced premium tax credits at the start of 2026, combined with rising insurer premiums, put a spotlight on health care affordability that extends beyond Marketplace enrollees. KFF’s Cynthia Cox examines the ACA’s record and the broader underlying question it raises: what’s a fair price for Americans people to pay for health care?

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  • Coverage of Colonoscopies Under the Affordable Care Act’s Prevention Benefit

    Report

    The Affordable Care Act (ACA) requires private health insurers to cover recommended preventive services such as colonoscopies without any patient cost-sharing. This report finds that confusion over whether colon cancer screenings are preventive care or treatment means patients sometimes receive unexpected bills for the procedure. The report examines cost-sharing practices for colorectal screenings through interviews with experts and officials in the medical and insurance industries. This report was co-authored by The Kaiser Family Foundation, American…

  • Children and Oral Health: Assessing Needs, Coverage and Access

    Issue Brief

    This policy brief highlights the prevalence of dental problems among children and examines gaps in oral health coverage and access to dental care, as well as disparities by income and race/ethnicity. It also looks at out-of-pocket costs for dental care, explains the role of Medicaid and CHIP in dental care, coverage and access for children and describes the expansion of oral health coverage for children under the Affordable Care Act. Issue Brief (.pdf)

  • Toplines: Kaiser Health Tracking Poll — July 2009

    Poll Finding

    This document contains the toplines from the July Health Tracking Poll. The survey was designed and analyzed by public opinion researchers at the Kaiser Family Foundation and was conducted July 7 through July 14, 2009, among a nationally representative random sample of 1,205 adults ages 18 and older. Telephone interviews conducted by landline (800) and cell phone (405, including 126 who had no landline telephone) were carried out in English and Spanish. The margin of…

  • Rewarding Healthy Behaviors: Variation in Health Risk Across Industries Among American Workers

    Issue Brief

    Faced with an unsustainable growth in health care costs, both employers and policymakers have begun to consider the potential savings that might be achieved by investments in health promotion and better access to preventive care. There has also been public discussion about the potential of building financial incentives for healthy behaviors and the use of prevention services into health plans. Creating the right incentives is a challenge however, because experience is so limited and healthy…

  • Health Reform: Implications for Women’s Access to Coverage and Care

    Issue Brief

    This issue brief, Health Reform: Implications for Women's Access to Coverage and Care, reviews how the Affordable Care Act is expected to affect access to care and affordability of health coverage for women. It also explains the provisions in the health reform law related to preventive screening services, reproductive health, maternity care and women on Medicare. The brief includes national and state-level estimates of the percentage of uninsured women ages 18-64 who are likely to…

  • Medicaid Beneficiaries and Access to Care

    Fact Sheet

    The health reform law relies on a large expansion of Medicaid to reach many low-income uninsured people, many of them adults. This fact sheet summarizes Medicaid beneficiaries' experience in obtaining access to care, a subject that is of keen interest in view of the planned expansion of the program. Medicaid and the Children's Health Insurance Program have substantially increased coverage among low-income Americans, especially children. Research shows that Medicaid compares favorably with private coverage in…

  • Expanding Medicaid under Health Reform: A Look at Adults at or below 133% of Poverty

    Issue Brief

    This issue brief from the Kaiser Commission on Medicaid and the Uninsured examines the key characteristics of the 17.1 million low-income uninsured adults who currently have incomes that would qualify them for Medicaid under the expansion of the program in health reform. The planned expansion of Medicaid to all individuals with incomes at or below 133 percent of the federal poverty level will establish a national foundation of coverage based on income. Adults whose incomes…

  • Chronic Disease and Co-Morbidity Among Dual Eligibles: Implications for Patterns of Medicaid and Medicare Service Use and Spending

    Report

    The health reform law contains provisions that aim to improve the delivery and coordination of services for persons enrolled in both Medicaid and Medicare, known as the dual eligibles. This population includes individuals with some of the most severely disabling chronic conditions. While the higher costs associated with services to dual eligibles is well-known, information on how spending is distributed across these programs is less understood. This study uses linked Medicare and Medicaid data to…

  • Pulling it Together: Forget Math and Science, Teach Civics (Or Why We Need to Bring Back Schoolhouse Rock)

    Perspective

    I am seldom surprised by our poll findings, but this month’s tracking poll produced a doozy.  Twenty-two percent of the American people think the Affordable Care Act has been repealed, and another 26 percent aren't sure.  Those are surprisingly large numbers even with the 52 percent who still know it is the law of the land. How could a repeal "vote" in the House -- however dramatic but still, only symbolic -- be misunderstood as…

  • Medicaid Policy Options for Meeting the Needs of Adults with Mental Illness under the Affordable Care Act

    Issue Brief

    This paper examines the salient issues raised in a November 2010 roundtable discussion of national and state experts convened by the Kaiser Commission on Medicaid and the Uninsured, in partnership with the Bazelon Center for Mental Health Law, to discuss Medicaid policy options available under health reform to help meet the needs of adults with mental illness. The Patient Protection and Affordable Care Act will expand the Medicaid program, offering the opportunity to improve access…