The independent source for health policy research, polling, and news.
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.
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.
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.
In his latest column, President and CEO Drew Altman discusses how, with nearly half, or about 10 million MAGA supporters and Republicans receiving coverage through the ACA Marketplaces, the policy changes and cuts being considered by Republicans to the Marketplaces will directly affect their own voters. Altman writes: "Republicans are no longer interested in repealing the ACA but seem comfortable shrinking it significantly if they can, so long as they don’t touch protections for pre-existing conditions, which is now a political third rail."
As Congress weighs spending cuts and other changes to Medicaid, more than half (54%) of the public say they are worried significant reductions in federal Medicaid spending would negatively affect their family’s ability to obtain and afford health care, a new KFF Health Tracking Poll finds.
Noncitizen immigrants, particularly those who are undocumented, face significant barriers to accessing health coverage and care and are significantly more likely than citizens to be uninsured. Some states have taken up options in Medicaid and the Children’s Health Insurance Program (CHIP) to expand coverage for lawfully present immigrants and/or established fully state-funded programs to fill gaps in coverage for immigrants. This brief provides an overview of state health coverage programs for immigrants regardless of status and examines how health coverage for immigrants vary by state coverage policies using data from the 2023 KFF/LA Times Survey of Immigrants.
This analysis examines the potential impacts of a provision in the House reconciliation bill that proposes reducing the federal matching rate for the Affordable Care Act (ACA) Medicaid expansion population from 90% to 80% for states that either provide health coverage or financial assistance to purchase health coverage to individuals who are not “a qualified alien.”
What percentage of people are covered by Medicaid in your state? Our State Medicaid fact sheets provide a snapshot with key data for Medicaid in every state related to current coverage, access, and financing, as well as a politics section for each state.
The Biden administration finalized several major Medicaid regulations with the intent of improving access to Medicaid services. Collectively, the rules span hundreds of pages of text, are extremely complex, and were set to be implemented over several years, with measurable increases in federal Medicaid spending. Overturning the rules would reduce regulation of managed care companies, nursing facilities, and other providers; increase barriers to enrolling in and renewing Medicaid coverage, and roll back enrollee protections, payment transparency, and requirements for improved access.
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.
This issue brief presents KFF WHS data on access to mental health services among women and men ages 18 to 64, and it also takes a closer look at mental health coverage among women.
© 2025 KFF