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.
In this JAMA Health Forum post, Executive Vice President Larry Levitt recalls the mid-1990s’ public backlash against Health Maintenance Organizations (commonly known as HMOs) – all of which preceded the recent outpouring of health insurance concerns – as well as how consumer protections against coverage restrictions have evolved and fallen short.
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.
Medicare Advantage plans denied 3.4 million prior authorization requests for health care services in whole or in part in 2022, or 7.4% of the 46.2 million requests submitted on behalf of enrollees that year, according to a new KFF analysis of federal data. That was a higher share of denials than in recent years. The share of all prior authorization requests denied by Medicare Advantage plans increased from 5.7% in 2019, 5.6% in 2020 and…
This Data Spotlight reviews national and state-level enrollment trends as of March 2017 and examines variation in enrollment by plan type and firm. It analyzes the most recent data on premiums, out-of-pocket limits, Part D cost-sharing for drugs, and plans’ quality ratings for Medicare Advantage enrollees.
For the first time, 1 in every 3 people with Medicare is enrolled in Medicare Advantage, the private Medicare plans that have played an increasingly large role in the Medicare program over the past decade, according to a new analysis from the Kaiser Family Foundation. Medicare Advantage enrollment has more than tripled since 2004, reaching 19 million, or 33 percent of enrollees, in 2017, the analysis shows. That milestone is up from 17.6 million beneficiaries…
Gretchen Jacobson, Associate Director of the Foundation's Program on Medicare Policy, testified on June 7, 2017 before the U.S. House Committee on Ways and Means, Subcommittee on Health. Her testimony focused on three approaches for integrating and coordinating care for Medicare beneficiaries, and the opportunities and challenges presented by these approaches.
A Kaiser Family Foundation analysis of private Medicare plan networks finds that Medicare Advantage plans include about half of area hospitals in their network, on average, while one in five plans have no Academic Medical Center in-network. Among plans in an area with a National Cancer Institute-designated cancer center, more than two in five did not include the cancer center in their network. The new study of the hospital networks of Medicare Advantage plans, which…
A new analysis from the Kaiser Family Foundation finds that 147 counties lack Medicare Advantage plans – many more than the 19 counties expected to lack an Affordable Care Act (ACA) marketplace insurer next year. Yet Medicare Advantage, the private plans that cover a third of all Medicare beneficiaries, is often described as an example of a robust insurance market, while some policymakers say the “bare” counties under the ACA are evidence that the law…
Medicare Advantage plan networks included 46 percent of all physicians in a county, on average, according to a new analysis from the Kaiser Family Foundation. The study, using 2015 data, is the first to examine the size and composition of physician networks among increasingly popular Medicare Advantage private plans, which now cover 19 million people, or one-third of the Medicare population. The study, which analyzed data from 391 plans offered by 55 insurers in a…
The 2010 Affordable Care Act (ACA) included many provisions affecting the Medicare program and the 57 million seniors and people with disabilities who rely on Medicare for their health insurance coverage. This brief explains the Medicare provisions in the ACA and explores the implications for Medicare and beneficiaries of repealing these provisions.
© 2026 KFF