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.
In this May 2019 post for The JAMA forum, Larry Levitt examines how the early discussion and positioning among the presidential candidates offers a glimpse into how a debate about Medicare-for-all might play out.
This web briefing with senior policy analysts at KFF examine proposals to expand public coverage like Medicare-for-all and their implications for the nation’s health care system.
Coverage Among People with HIV and the General Public Download…
Insurance Coverage Among People with HIV Expansion and Non-Expansion States Download…
This infographic provides data on the current status of health and health care for Blacks, including measures of their health coverage, health access and use, and health outcomes.
Insurance Coverage Among People with HIV, 2014 Download…
This side-by-side interactive compares 10 bills to expand public health coverage through Medicare-for-All, a public option and other approaches, that have been introduced in the current Congress. The interactive allows users to compare these proposals across a number of dimensions, including eligibility, benefits, cost sharing, provider payments, and more.
State approaches to adopting the Affordable Care Act’s Medicaid expansion have varied greatly by state based on state law, the political context, or other factors. While it does not cover how every state has enacted the Medicaid expansion, this issue brief highlights some of the different approaches states have taken to adopt the Medicaid expansion. Each state’s circumstances are unique, and the actions taken by one state may not apply to another state’s circumstances.
If states were able to receive enhanced Affordable Care Act matching funds for “partial” expansions of Medicaid, fewer people would get health coverage and the federal government would spend more, compared to a traditional expansion under the law, KFF explains in a new brief.
The Affordable Care Act (ACA) provides enhanced federal matching funds to states that expand Medicaid to nonelderly adults up to 138% of the federal poverty level (FPL, $17,236/year for an individual in 2019). The ACA enhanced match (93% in 2019, and 90% in 2020 and thereafter) is substantially higher than states’ traditional Medicaid matching rate. A few states have sought Section 1115 demonstration waiver authority from the Centers for Medicare and Medicaid Services (CMS) to receive the substantially higher ACA enhanced match while limiting coverage to individuals at 100% FPL, instead of covering the full 138% FPL ACA group. To date, CMS has allowed states to receive the ACA enhanced Medicaid matching funds only if the entire expansion group is covered. CMS has not approved waiver requests seeking enhanced ACA matching funds for a partial coverage expansion in Arkansas or Massachusetts, while a request is pending in Utah. This brief explores the current rules for partial expansion and explains some of the potential implications for financing and coverage if CMS approves waivers to allow for partial expansion with enhanced matching funds.
© 2025 KFF