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.
Each year, the Centers for Medicare & Medicaid Services (CMS) updates Medicare payments for physician services and other Part B services through rulemaking. This issue brief answers key questions about how physicians are paid under the Medicare program, and reviews policy options under discussion for payment reform.
This analysis for the Peterson-KFF Health System Tracker uses claims data from private, large employer-based plan to examine trends in complexity coding across outpatient practice settings from 2004 to 2021. It finds a trend toward higher complexity codes that contributes to higher outpatient spending.
A new analysis of data from KFF’s Survey on Racism, Discrimination, and Health shows Black women are more likely than other groups to report being treated unfairly by a health care provider in recent years because of their race and ethnicity and that these experiences have health consequences.
This brief examines Black women's experiences in health care, including unfair treatment by providers due to race and their health outcomes as a result of this treatment. The brief also explores the association between racially concordant providers and positive health care experiences among Black women.
This analysis highlights key findings about the health care experiences of older adults (ages 65 and older) based on KFF’s 2023 Survey on Racism, Discrimination, and Health, including variations by race and ethnicity.
Mergers and acquisitions involving hospitals and other health care providers are drawing attention from federal and state regulators, including the Federal Trade Commission, and policymakers amid concerns that such consolidations can reduce competition and contribute to the high costs of health care.
As policymakers and regulators pay more attention to consolidation in health care provider markets, this brief examines and summarizes the evidence about consolidation, including recent trends, the impact on prices and quality, and proposals to address consolidation and increase competition.
Despite occasional anecdotal reports of people having trouble finding a doctor who takes their insurance, KFF researchers find in a new analysis that the vast majority of non-pediatric office-based physicians accept new Medicare patients, as well as new private insurance patients.
This brief examines the share of non-pediatric office-based physicians accepting new patients with Medicare or private insurance and how these rates have changed over time and vary by physician specialties, geographic areas, and physician and practice characteristics across Medicare and private insurance. This analysis further examines the extent to which non-pediatric physicians are opting out of Medicare, by specialty and state.
Compared to most similarly large and wealthy countries, the U.S. has fewer practicing physicians per capita but has a similar number of licensed nurses per capita. Looking specifically at the hospital setting, the U.S. has more hospital-based employees per capita than most other comparable countries, but nearly half of these hospital workers are non-clinical staff.
© 2026 KFF