CRS Report – Medicaid: Selected Resources for National, State, and Local Enrollment Data – “Medicaid is a means-tested entitlement program that finances the delivery of primary and acute medical services, as well as long-term services and supports (LTSS). Each state designs and administers its own Medicaid program within federal parameters. Medicaid is jointly financed by states and the federal government. This report identifies selected resources for national, state, and local-level (i.e., congressional district or county level) data on Medicaid enrollment and enrollee characteristics that are frequently evaluated when examining Medicaid policy options. This report is not intended to be fully comprehensive. The descriptions and websites below include information on statistics, methodology, sources, definitions, caveats, and currency. CRS did not independently evaluate the accuracy of any of these data. Most of the data resources presented are from federal entities. Some are produced by think tanks and advocacy organizations. CRS does not take positions on policy options or any policy recommendations advocated by these organizations. References to think tank and advocacy organizations data sources are included solely for informational purposes. Table A-1 in the Appendix of this report provides key sources of data, organized based on the types of information they include, to guide readers in selecting appropriate data sources for different inquiries. Congressional offices may request assistance from CRS regarding data questions or additional search assistance. Data from different sources might not be comparable. For example, sources may use data from different periods of time (e.g., fiscal year vs. calendar year). Sources may also use different measures for enrollment; for example, an “average monthly” enrollment number would be lower than a total of all individuals who were “ever enrolled” at any point during an entire year…”

• Some sources included provide historical enrollment data. For context about trends in Medicaid enrollment over time, see “Medicaid Enrollment” in CRS Report R43357, Medicaid: An Overview.
• Some federal websites referenced in this report may be undergoing changes or be inaccessible as agencies comply with recent executive orders, guidance from the Office of Management and Budget (OMB), and Secretarial orders. Additionally, it is unclear at the time of writing what the impact of proposed Department of Health and Human Services restructuring⁴ may be on certain federal agency data sources.
• KFF – “The current budget bill proposes significant cuts to Medicaid, potentially reducing federal spending by $625 billion over ten years and affecting millions of enrollees. These cuts could lead to a decrease in Medicaid enrollment by approximately 10.3 million people by 2034, raising concerns about access to healthcare for vulnerable populations.”