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The ACA MarketplaceS

Tracking Insurer Changes in the ACA Marketplaces in 2027

As of June 22, six carriers have announced that they will exit the Marketplaces in plan year 2027, either in some or all states that they are currently offering plans; four carriers have announced they will enter new Marketplaces.

An image of text is an excerpt from Cynthia Cox's quick take which reads, "While the Trump administration attributes this drop in enrollment to their attempts to address fraud, this coverage loss happened at the same time millions of people faced steep increases in their premium payments — often in the double or even triple digits — with the expiration of enhanced tax credits."

ACA Marketplace Enrollment Is Down By 3 Million After Big Jump in Premium Payments

Enrollment dropped 13% following the expiration of enhanced premium tax credits at the beginning of this year. Enrollment fell from a high of 22.1 million people in 2025 to 19.2 million people in February 2026. While the Trump administration attributes this drop in enrollment to their attempts to address fraud, this coverage loss happened at the same time millions of people faced steep increases in their premium payments – often in the double or even triple digits – with the expiration of enhanced tax credits.

POLLING on the ACA

Tracking the Public’s Views on the ACA

While overall opinion of the Affordable Care Act has been more favorable than unfavorable since 2017, there remain deep partisan divides. See how public opinion on the ACA has changed from the inception of the law to the present. This interactive tool highlights key moments when views shifted and trends based on party identification, income, age, gender, and race/ethnicity.

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  • Harvard and Growth in Health Care Cost Sharing

    From Drew Altman

    In this column for The Wall Street Journal's Think Tank, Drew Altman explains why recent discussion of Harvard University’s introduction of new health insurance cost sharing measures amounted to “making a mountain out of a mole hill”.

  • Medicare Advantage Hospital Networks: How Much Do They Vary?

    Report

    This report takes an in-depth look at Medicare Advantage plans’ hospital networks. The analysis draws upon data from 409 Medicare Advantage plans serving beneficiaries in 20 diverse counties that together accounted for about one in seven (14%) Medicare Advantage enrollees nationwide in 2015. The report examines the size and composition of plans’ hospital networks, the variation across counties, the inclusion of Academic Medical Centers and NCI-Designated Cancer Centers, and the relationship between network size and…

  • Takeaways From Alaska’s Medicaid Expansion

    News Release

    In his latest column for The Wall Street Journal’s Think Tank, Drew Altman discusses the implications of the governor of Alaska’s decision to move ahead unilaterally with Medicaid expansion. All previous columns by Drew Altman are available.

  • Findings from the Field: Enrollment and Consumer Assistance in Four States in Year Three of the ACA

    Issue Brief

    Based on case studies and focus groups, this brief reviews experiences with Medicaid and Marketplace enrollment, renewal, and consumer assistance in Colorado, Connecticut, Kentucky, and Washington as of Spring 2016. These states implemented the Medicaid expansion and established a state-based Marketplace (SBM) in 2014. This brief builds on previous reports that examined states’ preparation for implementation prior to the initial ACA open enrollment period and their experiences after completion of the first and second open…

  • Findings from the Field: Medicaid Delivery Systems and Access to Care in Four States in Year Three of the ACA

    Issue Brief

    Based on case studies and focus groups, this brief reviews delivery systems and access to care for Medicaid enrollees in Colorado, Connecticut, Kentucky, and Washington as of Spring 2016. The findings provide an on-the-ground view of Medicaid delivery systems and enrollees’ experiences accessing care three years after implementation of the Medicaid expansion. This brief builds on previous reports that examined states’ preparation for implementation prior to the initial ACA open enrollment period and their experiences…

  • Partisanship’s Grip On The Affordable Care Act

    From Drew Altman

    In this Wall Street Journal's Think Tank column Drew Altman analyzes data from an upcoming Kaiser poll and discusses how partisanship is the dominant factor shaping views of the Affordable Care Act for Republicans and Democrats enrolled in marketplace plans.