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Explore KFF’s policy research, polling and news on the population who are uninsured and their access to health care services.

There were gains in coverage across most racial and ethnic groups between 2019 and 2023 after several years of rising uninsured rates during the first Trump administration. The coverage gains between 2019 and 2023 were largely driven by increases in Medicaid coverage, reflecting policies to stabilize and expand access to affordable coverage that were implemented during the COVID-19 pandemic.

Cynthia Cox is a vice president and director of the Program on the ACA, where she conducts economic and policy research on the Affordable Care Act and its effects on private insurers and enrollees. Her work focuses on enrollment, pricing and competition in the ACA’s exchange markets. Cox also directs…

Samantha Young, deputy California editor, directs coverage of health care politics and policy in California. Before that, she was a senior correspondent focused on government accountability and industry influence. Previously, as a reporter for The Associated Press, she covered the California Legislature and the Schwarzenegger administration, statewide political campaigns, and…

Our updated explainer provides an overview of comprehensive managed care, the most common way states deliver Medicaid services to enrollees.