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 a few short weeks, Medicare will undergo big changes that will have a major impact on more than 3 million Hispanic seniors and younger people with permanent disabilities who rely on Medicare for their health coverage. More than one in three Hispanics with Medicare lack coverage for their prescription drugs for at least part of the year. Many others will need to make decisions about their existing coverage and the new Medicare benefit. Starting…
Special Needs Plans are a form of Medicare Advantage plan authorized to provide a managed care option for beneficiaries with significant or relatively specialized care needs, including Medicare beneficiaries who are dually eligible for Medicare and Medicaid, beneficiaries living in nursing homes or other institutions, and beneficiaries with severe chronic or disabling conditions. This data spotlight examines availability and enrollment trends for Special Needs Plans, which account for a small share of enrollment today but…
This fact sheet provides an overview of the Medicare drug benefit and the additional subsidies available to certain eligible low-income beneficiaries. Fact Sheet - December 2009 (.pdf)
In August 2004, the Centers for Medicare and Medicaid Services published a proposed rule to implement the Medicare Prescription Drug Benefit (Title I of the Medicare Modernization Act). Given the high level of interest in the proposed rules for implementing the Medicare drug benefit, the Kaiser Family Foundation commissioned Health Policy Alternatives, Inc. to prepare this summary of the proposed regulations. Issue Brief (.pdf)
Medicare Health and Prescription Drug Plans Monthly Tracking Reports These briefs present monthly data on Medicare Advantage participation, enrollment and penetration. They also summarize recent activities by the Centers for Medicare and Medicaid Services (CMS), participating health plans, and the research community pertaining to the Medicare Advantage program and prescription drug plans that began serving the Medicare population in January 2006. The reports were prepared by researchers at Mathematica Policy Research Inc. April 2010 Report…
This issue brief merged beneficiary-level Medicare and Medicaid data from 2021 to document sources of coverage for dual-eligible individuals nationwide and by state.
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…
Higher market concentration in Medicare Advantage insurance markets may lower the incentive for insurers to compete for potential enrollees by making plans more appealing through more comprehensive benefits or lower costs.
This brief focuses on the stand-alone Medicare Part D prescription drug plan marketplace and its somewhat uncertain future, in light of recent trends in plan availability and the potential for another year of premium increases in 2026, in part depending on what the Trump administration decides to do with the temporary Part D premium stabilization demonstration. The brief explains why the stability of the PDP market matters, both for people in traditional Medicare who want…
The Medicare Part D program provides an outpatient prescription drug benefit to more than 50 million older adults and people with long-term disabilities in Medicare who enroll in private plans, including stand-alone prescription drug plans (PDPs) to supplement traditional Medicare and Medicare Advantage prescription drug plans (MA-PDs) that include drug coverage and other Medicare-covered benefits. This brief analyzes Medicare Part D enrollment and costs in 2025 and trends over time, based on data from the…
© 2026 KFF