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Affordable Care Act

The ACA Marketplace

2025 KFF Marketplace Enrollees Survey

In 2025, about one in three ACA enrollees said they would be “very likely” to look for a lower-premium Marketplace plan If their premium payments doubled.

Cost Concerns and Coverage Changes: A Follow-Up Survey of ACA Marketplace Enrollees

Following the expiration of the enhanced premium tax credits for people with Affordable Care Act (ACA) Marketplace plans, a new KFF follow-up survey of the same Marketplace enrollees KFF surveyed in 2025 finds half (51%) of returning enrollees say their health care costs are “a lot higher” this year compared to last year, including four in 10 who specifically say their premiums are “a lot higher.”

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POLLING

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.
DATA

Marketplace Enrollment is Down in 2026—But All of the Data Isn’t in Yet

ANALYSIS

Higher Premium Payments or Higher Deductibles: The ACA's Tradeoffs

QUIZ

Test Your Knowledge of the Affordable Care Act

ANALYSIS

Competition Increased in Individual Market But Fell in Fully Insured Group Markets

Timely insights and analysis from KFF staff

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  • The Uninsured And The Difference Health Insurance Makes

    Fact Sheet

    This fact sheet describes the characteristics of the uninsured and explains the recent increase in this population. It also examines the difference that health insurance can make and how health reform is expected to cover millions more people.

  • Medicaid Coverage and Care for the Homeless Population: Key Lessons to Consider for the 2014 Medicaid Expansion

    Report

    Beginning in 2014, the Affordable Care Act ACA provides for a significant Medicaid expansion uninsured, low-income adults. Given their low incomes and high uninsured rate, individuals experiencing homelessness could significantly benefit from this expansion. However, it will be important to address the barriers they face to enrolling in coverage and accessing needed care.

  • Coverage of Preventive Services for Adults in Medicaid

    Issue Brief

    This brief highlights data from a survey of coverage of 42 recommended preventive services for adults in Medicaid fee-for-service programs as of October 2010. Medicaid programs must cover preventive services for children as part of the Early Periodic Screening, Diagnosis and Treatment (EPSDT) benefit, but generally are not required to cover such services for adults.

  • Kaiser Health Tracking Poll: August 2012

    Feature

    This poll, conducted as the GOP prepares for its national convention, finds that the Affordable Care Act is not the top health care priority among Republicans.

  • 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 Cancer Society, and National Colorectal Cancer Roundtable.

  • Oral Health: Putting Teeth into the Health Care System

    Event Date:
    Event

    The Alliance for Health Reform and the Robert Wood Johnson Foundation sponsored an August 17 briefing to discuss oral health coverage under the Patient Protection and Affordable Care Act (PPACA). While PPACA ensures dental coverage for children, challenges remain to improve dental health access and coverage for adults.

  • Transparency and Complexity

    Perspective

    This fall a new rule takes effect requiring all private health plans to offer a uniform, simple to read, summary of benefits and coverage (SBC).  The SBC will provide consumers with standardized information about how plans cover essential health benefits and what coverage limits and cost sharing applies.