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KFF’s policy research provides facts and analysis on a wide range of policy issues and public programs.
KFF designs, conducts and analyzes original public opinion and survey research on Americans’ attitudes, knowledge, and experiences with the health care system to help amplify the public’s voice in major national debates.
KFF Health News is a national newsroom that produces in-depth journalism about health issues and is one of the organization’s core operating programs.
State Health Facts is a KFF project that provides free, up-to-date, and easy-to-use health data for all 50 states, the District of Columbia, and the United States. It offers data on specific types of health insurance coverage, including employer-sponsored, Medicaid, Medicare, as well as people who are uninsured by demographic characteristics, including age, race/ethnicity, work status, gender, and income. There are also data on health insurance status for a state's population overall and broken down by age, gender, and income.
In his latest column, KFF President and CEO Drew Altman discusses the history of the battles over the ACA’s provisions that were designed to expand coverage for the uninsured, which helps explain the effort to cut federal funding for the Medicaid expansion today. The real underlying issues, he says, are the same divisions that have always plagued the debate about covering the uninsured.
Through regulations and the House budget reconciliation bill, significant changes are being considered by Congress and the Trump Administration for how the Affordable Care Act’s health insurance Marketplaces would work. To examine how these changes could reshape the ACA’s Marketplaces, KFF held a virtual briefing on June 11 featuring leaders from two state-based Marketplaces to get perspectives from the field.
This chart examines individual market enrollment data from 2011 through 2025, when enrollment reached a record high of 25.2 million people. Affordable Care Act (ACA) Marketplace enrollment increased following the enactment of enhanced premium tax credits in 2021, as more individuals became eligible for subsidies.
In a new column, Dr. Drew Altman, KFF's President and CEO, examines the different counts of the number of people on Medicaid that are currently in use, which range from 69 to 83 million, and why it might matter. He also discusses other ways to assess the reach of the program: “possibly it’s useful to explain why there are different numbers out there about what seemingly is an all-time simple question: how many people are on Medicaid,” Altman says.
The Medicare drug price negotiation program could improve coverage of drugs selected for negotiation for Medicare beneficiaries because the law requires all Medicare Part D plans to cover each of the selected drugs, including all dosages and forms, when negotiated prices take effect.
This analysis examines 2026 Medicare Part D formulary coverage of drugs selected for negotiation to measure the effect of the IRA's coverage requirement.
Just over 35 million people are enrolled in Medicare Advantage in February 2026, an increase of 1.1 million since a year ago. The increase was largely driven by increased enrollment in special needs plans.
Most adult Medicaid enrollees who will be subject to new work requirements are already working but rely on Medicaid because their employers do not offer health coverage or they are not eligible for the coverage offered at their job. This analysis examines the availability of job-based insurance in 2024 for adult Medicaid workers ages 19 to 64.
Virtually all (98.9%) of the 2.6 million Medicare beneficiaries enrolled in a Medicare Advantage plan that terminated coverage at the end of 2025 have at least one MA-PD available in 2026, including more than two-thirds (68.7%) who have the option of enrolling in a plan sponsored by the same insurer.
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 ten who specifically say their premiums are “a lot higher.”
A new column on the uninsured from President and CEO Dr. Drew Altman explains: “The uninsured is not the most politically salient problem in health care now, that’s affordability, nor is it the non-problem some say it is. But it’s coming back. And the problem of the chronically ill uninsured is glaring.” Read more.
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