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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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  • 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…

  • Explaining Health Reform: Uses of Express Lane Strategies to Promote Participation in Coverage

    Issue Brief

    Under the Patient Protection and Affordable Care Act (ACA), millions of uninsured adults and children will gain eligibility for Medicaid or health coverage through new health insurance Exchanges beginning in 2014. The law calls upon states to develop simple and streamlined processes for establishing, verifying, and updating eligibility for Medicaid, the Children's Health Insurance Program and federal subsidies for Exchange coverage. This issue brief examines how states can employ "express lane" principles in designing systems…

  • Health Care Use and Chronic Conditions Among Childless Adult Medicaid Enrollees in Arizona

    Issue Brief

    Under the Affordable Care Act (ACA), beginning in 2014, Medicaid eligibility will expand to 133% of the federal poverty level for nearly all individuals. Arizona is one of the few states that already cover adults without dependent children in Medicaid through a longstanding Section 1115 waiver. This report, based on 2007 Medicaid claims data for adult Medicaid enrollees in Arizona, provides an analysis of health care utilization and health conditions for childless adults and compares…

  • How is the Affordable Care Act Leading to Changes in Medicaid Today? State Responses to Five New Options

    Issue Brief

    This policy brief examines how states in every region have responded to five key opportunities available under the health reform law to help them prepare for the significant expansion of Medicaid in 2014. The options covered in the brief include incentives for states to get an early start on the Medicaid coverage expansion; increased federal funding to upgrade Medicaid eligibility systems; money to improve care for beneficiaries with chronic conditions by providing "health home" services;…

  • Kaiser Health Tracking Poll: Election 2008: October 2008

    Poll Finding

    The final Kaiser Health Tracking Poll: Election 2008 finds more people are reporting problems with health care bills, and paying for health care retains a solid hold on the public’s list of their top economic concerns. About one in three Americans now report their family has had problems paying medical bills in the past year, up from about a quarter saying the same two years ago.  Almost one in five (18%) of Americans report household…

  • Pulling It Together: Keeping the Health Reform Coalition Together

    Perspective

    We could be headed for a new schism in the debate about health reform. Not the familiar gulf between advocates of the market and government, or the predictable one between deficit hawks and spenders, but a new one that crosses traditional partisan and ideological lines between advocates of long-term reform of the health care delivery system, and immediate help for the uninsured and insured struggling with health care costs.  This new rift is most likely to develop if tight money and a crowded agenda…