MAXEM: Development of the Medicaid Analytic Extract Enrollee Master (MAXEM) Data, 2005 to 2007

Issue Briefs

• “Migration Patterns for Medicaid Enrollees, 2005-2007 (ZIP).” This issue brief presents an analysis of the migration patterns of Medicaid enrollees by eligibility group and state over the period January 2005 through December 2007. The analysis focuses on two major topic areas. The first one is a national analysis of migration that examines the number of enrollees by the number of moves, the number of states to which enrollees moved and the number of moves associated with enrollment gaps of varying lengths. The second one is a state analysis presented in two parts. The first part includes in-migration, out-migration, net migration, along with a comparison to overall U.S. population migration. The second part examines the number of enrollees who moved, the number of moves, and enrollment gaps for moves between pairs of states..“Medicaid Enrollment Gaps, 2005-2007.” The Medicaid program provides health insurance coverage every year to more than 60 million Americans spanning all ages. Eligibility is based on both categorical factors and income. Each can change, resulting in a potential loss of eligibility for an enrollee. Prior research has established that the loss of Medicaid coverage, whether temporary or permanent, has consequences for both the individual and the community. In this issue brief, which is based on a larger report, we use data from a source—Medicaid administrative records that have been unduplicated and linked over time—to investigate discontinuities in Medicaid enrollment by eligibility group over the period January 2005 through December 2007. We focus on two areas: (1) continuity of coverage and (2) the duration of enrollment gaps. 
•  “Movement of Children between Medicaid and CHIP, 2005 to 2007 (ZIP)”. The Children’s Health Insurance Program (CHIP) provides health insurance coverage to millions of children whose families are unable to obtain employer-sponsored insurance or purchase private non-group coverage but whose Incomes are above the limits that would qualify their children for Medicaid. Family incomes are fluid, however, and many children who receive coverage through CHIP were covered by Medicaid earlier or will shift their coverage to Medicaid later. This issue brief uses data from a source—Medicaid administrative records that have been unduplicated and linked over time—to examine the movement of children between Medicaid and CHIP from 2005 through 2007.