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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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  • Summary of Key Changes to Medicare in 2010 Health Reform Law   

    Issue Brief

    Summary of Key Changes to Medicare in 2010 Health Reform Law . This brief provides a detailed look at the improvements in Medicare benefits, changes to payments for providers and Medicare Advantage plans, various demonstration projects and other Medicare provisions in the law. It includes a timeline of key dates for implementing the Medicare-related provisions in the law.

  • How Will Uninsured Parents Be Affected By Health Reform?

    Issue Brief

    This brief examines uninsured parents and how they could be affected by health reform, including estimates of how many might qualify for coverage under a Medicaid expansion, how many would be eligible for subsidies and how many would not be eligible for such help. Issue Brief (.pdf)

  • Explaining Health Care Reform: What is Comparative Effectiveness Research?

    Issue Brief

    The brief examines current funding for comparative effectiveness research, the provisions included in the current health reform legislation, and issues related to which treatments that might be studied, whether and how to weigh costs of care, and how such findings will be used and shared with health-care practitioners and the public. It is part of the Foundation's series of Explaining Health Reform briefs on key concepts in health reform. Brief (.pdf)

  • Pulling it Together: An Actuarial Rorschach Test

    Perspective

    Drew Altman, Larry Levitt, Gary Claxton My colleagues have worked on this column with me and I invited them to join me as authors. As with pretty much every other discussion of health care going back to the days of Roosevelt, the great reform debate of 2009 (and now 2010) has been distilled into an ideological battle over the role of government. A government-sponsored "public option" has been off the table for a while now,…

  • Massachusetts’ Demonstration to Integrate Care and Align Financing for Dual Eligible Beneficiaries

    Issue Brief

    Massachusetts is the first state to finalize a memorandum of understanding (MOU) with the Centers for Medicare and Medicaid Services (CMS) to test CMS's capitated financial alignment model for beneficiaries who are dually eligible for Medicare and Medicaid, with enrollment beginning on April 1, 2013. Starting in 2013, CMS will implement a three-year multi-state demonstration to test new service delivery and payment models for people who are eligible for both federal health programs. Massachusetts' demonstration…

  • 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…