This tracker shows enrollment data for Medicaid and the Children’s Health Insurance Program (CHIP) in all 50 states and DC, from January 2025 to the most recent month available. Data include total Medicaid/CHIP enrollment, as well as enrollment for children, adults, and Medicaid expansion. Historical data are also included to provide additional context for state enrollment trends back to December 2019. This tracker is updated continuously.
Methodology
This analysis of Medicaid/CHIP enrollment data from the Georgetown University Center for Children and Families (CCF) uses state administrative enrollment data and data from the Centers for Medicare & Medicaid Services (CMS) to track total, child, adult, and expansion (where applicable) enrollment in Medicaid and the Children’s Health Insurance Program (CHIP) in each state. This tracker is updated as new data becomes available.
CCF uses administrative enrollment data posted to state websites where available. If state administrative data are not available or are not up-to-date, CCF uses enrollment data from CMS. All states and the District of Columbia are required to report monthly Medicaid and CHIP enrollment data to CMS as part of the Performance Indicator Project (PI). CCF uses updated rather than preliminary CMS enrollment data for all but the most recent month, for which only preliminary data is available; CCF updates this tracker with updated CMS data as it becomes available to adjust for minor changes compared to preliminary data. PI data do not separately identify the Affordable Care Act (ACA) Medicaid expansion new adult group; CCF uses enrollment data submitted to CMS through the Medicaid Budget and Expenditure System (MBES) on Form CMS-64. Please see the sources document for more information on data sources in each state. Child, Adult, and Expansion groups will not sum to Total Medicaid/CHIP because of differences in data sources.
Medicaid/CHIP enrollment in both CMS data and state administrative sources tends to be higher than coverage estimates in survey data, such as the U.S. Census Bureau’s American Community Survey (ACS). Survey data often reflect a “Medicaid undercount” due to factors such as sampling and reporting error and demographic characteristics. Medicaid/CHIP enrollment reflected in this tracker may differ from other coverage estimates using different data sources.