CHIP Enrollment in the U.S., by Congressional District
To estimate health care enrollment by Congressional district, this white paper first gathered statewide data for Medicaid, Medicaid Expansion (Group VIII) and CHIP enrollees. This white paper analyzed data from the Centers for Medicare & Medicaid Services (CMS) from September 2021. Specifically, this white paper cites statistics from FFY 2020 Number of Children Ever-Enrolled in Medicaid and CHIP (which contains state-reported enrollment data from the Statistical Enrollment Data System (SEDS) as of June 23, 2021) and Medicaid Enrollment – New Adult Group, Centers for Medicare & Medicaid Services, September 2021. CMS data were then cross-referenced against U.S. Census data from the 2018 American Community Survey that estimated Medicaid enrollees by Congressional District. Statewide enrollment numbers for CHIP and Medicaid expansion were then apportioned across Congressional Districts in the same proportion as overall Medicaid enrollment. Similar methodology has been used by other health care research organizations, such as the Georgetown University Center for Children and Families, to develop Congressional district estimates of Medicaid enrollees.