The Medicaid Undercount: Real or Perceived Bias in Estimates of Coverage in General Population Surveys

Vol. XI, No. 6
September 2008

Does the undercount of individuals with Medicaid coverage bias the estimates of the number of uninsured? Kathleen Thiede Call, Ph.D., examined whether limitations in population surveys and the collection of administrative data lead to an undercount in the number of individuals with Medicaid coverage and found that the small amount of bias created by an undercount among Medicaid enrollees does not greatly undermine the validity of estimates of the uninsured or the policies resulting from that information. Learn more in the HCFO Findings Brief.