Objective. To examine whether known Medicaid enrollees misreport their health insurance coverage in surveys and the extent to which misreports of lack of coverage bias estimates of uninsurance.
Data Source. Primary survey data from the Medicaid Undercount Experiment.
Study Design. Analyze new data from surveys of Medicaid enrollees in California, Florida, and Pennsylvania and summarize existing research examining bias in coverage estimates due to misreports among Medicaid enrollees.
Data Collection Method. Subjects were randomly drawn from Medicaid administrative records and were surveyed by telephone.
Principal Findings and Conclusions. Cumulative evidence shows that a small ...