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.
Published in the journal Health Affairs, this analysis compared measures of access to care, cost concerns, and satisfaction with care for beneficiaries younger than age sixty-five versus those ages sixty-five and older, using the 2019 Medicare Current Beneficiary Survey.
This analysis provides the latest data about Medicare Part D enrollment, premiums, and cost sharing in 2022 and trends over time, including information about stand-alone prescription drug plans (PDPs) and Medicare Advantage prescription drug plans.
Medicare Advantage plans denied two million prior authorization requests for health care services in whole or in part in 2021, or about six percent of the 35 million requests submitted on behalf of enrollees that year, a new KFF analysis finds. Prior authorization is intended to ensure that health care services are medically necessary by requiring providers to obtain approval before a service or other benefit is covered. While prior authorization has long been used…
With open enrollment underway, Medicare beneficiaries have until December 7th to review and select their coverage for 2024. They also have a lot of options to choose from, as two new KFF analyses show. For many beneficiaries, the first decision is whether to enroll in traditional Medicare (often with supplemental coverage and a stand-alone prescription drug plan) or Medicare Advantage, the private plans sponsored by insurance companies that now cover more than half of all…
This analysis looks at traditional Medicare spending among people who choose to disenroll from Medicare Advantage and obtain coverage under traditional Medicare during the annual Medicare open enrollment period. It compares their traditional Medicare spending (Parts A and B) in the year following disenrollment to similar people who were continuously covered by traditional Medicare, using data from the Medicare Beneficiary Summary File (MBSF) for 2021 and 2022.
A new KFF analysis finds higher Medicare spending among people who switched from Medicare Advantage to traditional Medicare than for similar beneficiaries who were in traditional Medicare all along. Medicare spent an average of 27% more on such beneficiaries, according to the analysis, which examined health costs in traditional Medicare for both groups in the year following the switch, after adjusting for differences in health status and other characteristics. This amounts to a difference of…
This brief considers how default enrollment into Medicare Advantage might work, potential challenges with this approach, and implications for beneficiaries, insurers, providers, agents and brokers, and the federal budget.
This Kaiser Family Foundation report analyzes the content and frequency of television, print and radio advertisement for private Medicare plans that ran nationally or in one of three local media markets (Miami/Fort Lauderdale, Fla.; Phoenix, Ariz.; and Greensboro, N.C.) during the marketing and enrollment period for 2008 plan offerings. All ads were identified by VMS, a media monitoring service. The study finds that insurers last year placed three times more advertisements to promote Medicare Advantage…
This Policy Insight explores possible explanations for the continued rise in Medicare Advantage enrollment between 2010 and 2013 in spite of a projected decrease following payment changes in the Affordable Care Act (ACA).
As the number of Medicare Advantage enrollees continues to climb, there is growing interest in understanding how the care provided to Medicare beneficiaries in Medicare Advantage plans differs from the care received by beneficiaries in traditional Medicare. This literature review of more than 40 studies synthesizes the evidence to date comparing access and quality for beneficiaries in Medicare Advantage plans and traditional Medicare.
© 2026 KFF
