title: Use of community-based mental health programs by HMOs: evidence from a Medicaid demonstration.
abstract: BACKGROUND
  Proposals to enroll Medicaid beneficiaries in health maintenance organizations (HMOs) have raised concerns that community-based mental health treatment programs would be adversely affected.
  
  
  METHODS
  In Hennepin County (Minnesota) 35% of Medicaid beneficiaries were randomly assigned to prepaid plans. Random samples of individuals with severe mental illness with selected from the prepaid enrollees and from beneficiaries remaining with traditional Medicaid. The two groups were compared with respect to their use of community treatment programs and the write-off (the proportion of patient charges for which payment was not received) experienced by those programs for members of the study sample.
  
  
  RESULTS
  There was no strong evidence that Medicaid beneficiaries with severe mental illness who were randomly assigned to prepaid plans used community-based mental health treatment programs differently than did other Medicaid beneficiaries. However, write-offs were consistently higher for enrollees in prepaid plans.
  
  
  CONCLUSIONS
  In the short run, the use of community-based mental health treatment programs need not be affected by enrollment of Medicaid beneficiaries in prepaid plans, providing that Medicaid program administrators take steps to minimize the disruption of ongoing treatment, offer beneficiaries a choice among prepaid plans, and encourage community treatment programs to contract with plans to serve beneficiaries.
authors.affiliation: Division of Health Services Research and Policy, School of Public Health, University of Minnesota, Minneapolis 55455.
authors.forename: J B
authors.initials: JB
authors.lastname: Christianson
authors.forename: N
authors.initials: N
authors.lastname: Lurie
authors.forename: M
authors.initials: M
authors.lastname: Finch
authors.forename: I S
authors.initials: IS
authors.lastname: Moscovice
authors.forename: D
authors.initials: D
authors.lastname: Hartley
mesh_terms: D000328:Adult; D003156:Community Mental Health Services / Q000191:economics / Q000458:organization & administration / Q000706:statistics & numerical data*; D005240:Feasibility Studies; D005249:Fees and Charges / Q000706:statistics & numerical data; D005260:Female; D006279:Health Maintenance Organizations / Q000191:economics / Q000458:organization & administration / Q000706:statistics & numerical data*; D006302:Health Services Research; D006801:Humans; D007407:Interviews as Topic; D008297:Male; D008484:Medicaid; D001523:Mental Disorders / Q000628:therapy*; D008910:Minnesota; D010342:Patient Acceptance of Health Care; D012044:Regression Analysis; D012051:Reimbursement Mechanisms / Q000592:standards; D014481:United States