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.
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.
Medicare Advantage plans gain beneficiaries from traditional Medicare who have lower average spending and use fewer health services than similar beneficiaries who choose to remain in traditional Medicare, according to a new KFF analysis. The analysis finds that people who switched from traditional Medicare to Medicare Advantage in 2016 had health spending in 2015 that was $1,253 less, on average, than the average spending for beneficiaries who remained in traditional Medicare (after adjusting for health…
The analysis finds that people who switched from traditional Medicare to Medicare Advantage in 2016 had health spending in 2015 that was $1,253 less, on average, than the average spending for beneficiaries who remained in traditional Medicare (after adjusting for health risk). The findings suggest that the current payment method may systematically overestimate expected costs of Medicare Advantage enrollees. Adjusting payments to reflect Medicare Advantage enrollees’ prior use of health services could potentially lower total…
Almost two-thirds of Medicare beneficiaries (65%), or nearly 37 million people, do not have dental coverage and many go without needed care, according to a new KFF brief on dental coverage and costs for Medicare beneficiaries. Rates are even higher among black and Hispanic beneficiaries, and those with low incomes. Medicare does not cover routine preventive dental care or more expensive dental services that are often needed by older adults. Lack of dental care can lead…
Medicare does not cover routine dental care and the majority of Medicare beneficiaries do not have dental coverage. Some beneficiaries have dental coverage through other sources, including Medicare Advantage, Medicaid, and private plans, but almost half of all beneficiaries have not been to the dentist in the past year and many older adults face high out-of-pocket costs for needed dental care. The brief reviews the state of oral health for people on Medicare, describing the…
This issue brief provides an overview of Medicare, the health insurance program for people ages 65 and over and younger people with long-term disabilities. The brief review the characteristics of people on Medicare, what Medicare covers, benefit gaps and supplemental coverage, beneficiaries' out-of-pocket health care spending, program spending and financing, payment and delivery system reform, and issues for the future of Medicare.
Our analysis of CMS data shows that in 135 counties – accounting for 6 million Medicare beneficiaries – more than half of all Medicare beneficiaries are enrolled in Medicare Advantage or cost plans.
In this November 2018 New England Journal of Medicine article, KFF's Tricia Neuman and Gretchen Jacobson examine the extent to which Medicare Advantage plans are achieving goals with respect to benefits, out-of-pocket costs, plan choice, federal spending and quality.
Medicare Advantage enrollees are encouraged to select their plan based on a number of factors, including premiums, cost-sharing, extra benefits, drug coverage, quality of care, and provider networks, but a potentially overlooked factor is access to covered services and the potential impact of prior authorization requirements. In this data note, we examine the share of Medicare Advantage enrollees that are in plans requiring prior authorization and approval before covering the costs of services.
© 2026 KFF