Report for Phase VI of the SNACC Medicaid Undercount project:  Comparing MSIS and MEPS.  This phase replicates the Phase II process but uses the calendar year 2003 Medical Expenditure Panel Survey (MEPS) data. The intent of Phase VI is to determine how the MEPS estimate of the number of Medicaid enrollees compare to the count from National MSIS as well as to determine factors associated with false-negative response about Medicaid in MEPS.  January 2010.