View the Latest: Enrollment
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Total Number of Medicare Beneficiaries by Type of Coverage
State Health Facts Indicator -
Medicare Advantage in 2025: Enrollment Update and Key Trends
Issue BriefIn 2025, more than half (54%) of eligible Medicare beneficiaries are enrolled in Medicare Advantage plans. This brief provides current information about Medicare Advantage enrollment, by plan type and firm, and shows how enrollment varies by state and county.
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Medicare Beneficiaries as a Percent of Total Population
State Health Facts Indicator -
Fraud in Marketplace Enrollment and Eligibility: Five Things to Know
Issue BriefThis brief evaluates what is currently known about fraud and abuse in the Affordable Care Act (ACA) Marketplace, including how the final Marketplace Integrity and Affordability Rule and the recently enacted budget reconciliation law change existing Marketplace enrollment and eligibility standards.
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The Mystery of How Many People Are on Medicaid
From Drew AltmanIn a new column, Dr. Drew Altman, KFF's President and CEO, examines the different counts of the number of people on Medicaid that are currently in use, which range from 69 to 83 million, and why it might matter. He also discusses other ways to assess the reach of the program: “possibly it’s useful to explain why there are different numbers out there about what seemingly is an all-time simple question: how many people are…
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Senate Finance Language Would Further Cut Federal Spending for Medicaid Expansion States
Policy WatchPrior KFF analysis allocated CBO’s federal Medicaid spending reductions and enrollment losses across the states, and this policy watch builds on that analysis to examine the potential impacts in expansion states compared with non-expansion states.
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How the Reconciliation Bill Limits States’ Authority Over ACA Insurance Markets
Quick InsightsTaken together, the reconciliation bill's provisions impose additional administrative burdens on state-based marketplaces and could limit state flexibility in choosing marketplace policies and procedures.
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Allocating CBO’s Estimates of Federal Medicaid Spending Reductions and Enrollment Loss Across the States: House Reconciliation Bill
Issue BriefThe Congressional Budget Office’s (CBO) latest estimate shows that the One Big Beautiful Bill would reduce federal Medicaid spending by $793 and that the Medicaid provisions would increase the number of uninsured people by 7.8 million. Previous CBO estimates show that 10.3 million fewer people would be enrolled in Medicaid in 2034. Building on prior KFF analysis, this analysis allocates these estimated federal spending reductions and enrollment losses across the states.
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The Spotlight Is on Medicaid Cuts, But the ACA Marketplaces Could See a One-Third Cut in Enrollment
From Drew AltmanIn his latest column, President and CEO Drew Altman shows how proposals contained in the House reconciliation bill could result in a one-third reduction in ACA Marketplace enrollment. “While all eyes are on the big Medicaid cuts being proposed in the House,” he writes, “significant changes are also being proposed that together would dramatically reduce enrollment in the ACA Marketplaces.”