[영문]OBJECTIVE: The objective of this study was to assess changes in individual beneficiaries' utilization and expenditures that occur when individuals with depression, who often require maintenance treatment, return to Medicaid after a period of interrupted Medicaid coverage. METHODS: Data from 1999 to 2002 Florida Medicaid claims from and eligibility files for beneficiaries with depression whose coverage was interrupted (N=1,946) were used to assess individual changes in the number of inpatient episodes, length of inpatient stay, emergency department visits, and total Medicaid expenditures between the three-month period immediately before and the three-month period immediately after an interruption in coverage. Multivariate analyses were used to assess how beneficiary characteristics are associated with changes in utilization and expenditures. RESULTS: The number of inpatient episodes increased by .054 episode (pqqqlt;.001), the length of inpatient stay increased by .32 day (pqqqlt;.001), the number of emergency department visits increased by .57 visit (pqqqlt;.001), and total Medicaid expenditures increased by