This public use data file is the fourth point in time data file to be released from the Medical Expenditure Panel Survey Household Component (MEPS HC). The data are being released both as an ASCII file (with related SAS, SPSS, and STATA programming statements) and in SAS transport format. This public use file provides information on data collected on a nationally representative sample of the civilian non-institutionalized population of the United States during the early part of 1999. This file consists of 1999 data obtained in Round 1 of Panel 4 of the MEPS Household Component and contains variables pertaining to survey administration, demographics, employment, health status, and health insurance.