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.
While Medicare Advantage enrollment is highly concentrated among a small number of firms, UnitedHealthcare has seen the largest and fastest growing share of enrollees over the past decade. Learn more in this Chart of the Week.
This brief describes how the Medicare Part D benefit will change in 2020 under current law and proposed changes that would affect what beneficiaries, plans, manufacturers, and Medicare pay for drug costs under Part D in the future.
Medicare does not cover routine dental care and about half of Medicare beneficiaries do not have dental coverage. This brief examines five potential ways to make oral health care more available and affordable for the Medicare population. This brief reviews the limits of dental coverage permitted under current Medicare law, then describes each of the policy options, with an analysis of likely implications for key stakeholders, including Medicare beneficiaries, taxpayers, insurers, and dental professionals
Who pays for Medicare? Learn how Medicare financing breaks down in this Chart of the Week.
Take this quiz to find out how much you know about Medicare, the people it serves, the benefits it covers, and its financial status.
This data note explores the attitudes and experiences of older adults, ages 65 and up, when it comes to prescription drugs and related policy proposals being discussed. Experiences across different demographic groups are explored, such as household income and health status.
This brief examines the role private insurers play in providing health coverage for Americans today in employer plans and the individual market, as well as in Medicare and Medicaid, and how that would likely change under Medicare-for-all and other proposals.
The Medicare Part D prescription drug benefit has helped improve the affordability of medications for people with Medicare. Yet Part D enrollees can face relatively high out-of-pocket costs because the Part D benefit does not have a hard cap on out-of-pocket spending. This analysis presents the latest data on out-of-pocket drug spending among Medicare Part D enrollees without low-income subsidies who have costs above the catastrophic coverage threshold.
KFF's Tricia Neuman's testimony before the U.S. House Committee on Ways and Means on June 12, 2019 describes a range of proposals to broaden health insurance coverage and make health care more affordable, the similarities and differences among them, and the policy choices and trade-offs that could have significant implications for coverage and costs.
The analysis examines enrollment in Medicare Advantage plans during beneficiaries’ first year on Medicare and finds that less than one-third or 29% enrolled in these private health plans, including HMOs or PPOs. The majority of people new to Medicare are choosing traditional Medicare in the year they first go on Medicare. The study looks at how these findings vary across age, Medicaid status, states, and counties.
© 2026 KFF