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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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  • Visualizing Health Policy: Health Care in the 2012 Election

    Other Post

    The October 2012 Visualizing Health Policy infographic provides a snapshot of how health care–related issues are shaping the 2012 presidential election, including the percentage of Democrats, Republicans, and independents who named health care or the economy as the issue that is most important in determining their vote for President; which health care issues are considered most important by Americans; how health care has compared with the economy and other issues as the most important issue…

  • Health Insurance Market Reforms: Pre-Existing Condition Exclusions

    Fact Sheet

    Insurers pursue multiple strategies to reduce the cost of covering enrollees with pre-existing conditions, or medical conditions and health problems that existed before the individual enrolled in a health plan. One strategy, the pre-existing condition exclusion, allows insurers to refuse to cover any costs associated with care for a pre-existing condition permanently or over a period of time. Beginning January 1, 2014, insurers in the individual and group markets will be prohibited from imposing pre-existing…

  • Kaiser Health Tracking Poll: October 2012

    Feature

    The October Health Tracking Poll finds, one week before the presidential election, the economy remains the primary concern on voters' minds, but health policy issues remain in the mix. The new survey finds that roughly a third of likely voters name the Affordable Care Act (37%), Medicare (36%), and Medicaid (30%) as "extremely important" to their vote, compared to half (52%) who say the same about the economy and jobs. But separate health care issues…

  • National and State-By-State Impact of the 2012 House Republican Budget Plan for Medicaid

    Report

    This analysis of the House Budget Plan that was passed in 2012 finds that repealing the Affordable Care Act (ACA) and converting Medicaid to a block grant would trigger significant decreases in federal Medicaid spending and could result in substantial reductions in enrollment and payments to providers compared to current projections. The analysis, conducted by the Urban Institute for the Kaiser Family Foundation’s Commission on Medicaid and the Uninsured, updates a similar study from May…

  • Quantifying the Effects of Health Insurance Rate Review

    Report

    This report from the Kaiser Family Foundation analyzes the effect of government efforts to ensure that insurance premium increases are justifiable and provide value to consumers and small businesses. Rate review programs require insurers in the small group and individual markets to submit proposed rate increase requests to state or federal regulators, who determine if the requests are reasonable. The report finds that one out of every five requests submitted to states in 2011 resulted…

  • 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…

  • Medicaid Financing: An Overview of the Federal Medicaid Matching Rate (FMAP)

    Issue Brief

    Since its enactment in 1965, the Medicaid program has used the Federal Medical Assistance Percentage (FMAP) to determine the federal government's share of the cost of covered services in state Medicaid programs. On average, the federal share has been 57 percent. Beginning in 2014, the Affordable Care Act (ACA) establishes highly enhanced FMAPs for the cost of services to low-income adults with incomes up to 138% of the Federal Poverty Level (FPL) who are not…

  • Explaining the State Integrated Care and Financial Alignment Demonstrations for Dual Eligible Beneficiaries

    Issue Brief

    This paper provides an overview of the joint efforts of states and the Centers for Medicare and Medicaid Services (CMS) to develop more integrated ways of paying for and delivering health care to the 9 million people who are eligible for both the Medicare and Medicaid programs. Dual eligible beneficiaries comprise many of the poorest and sickest people covered by either program, and they account for a disproportionately large share of Medicare and Medicaid spending.…

  • State Demonstrations to Integrate Care and Align Financing for Dual Eligible Beneficiaries: A Review of the 26 Proposals Submitted to CMS

    Report

    The Centers for Medicare and Medicaid Services (CMS) has proposed two models to align Medicare and Medicaid benefits and financing for dual eligible beneficiaries, one capitated model and one managed fee-for-service model. In the spring of 2012, 26 states submitted proposals to CMS seeking to test one or both of these models. CMS is presently reviewing the states' proposals to determine which will be implemented. This background paper examines the contents of the 26 states'…