title: Medicaid chemical dependency patients in a commercial health plan: do high medical costs come down over time?
abstract: A cohort of 197 Medicaid-insured patients presenting for treatment in Kaiser Permanente's outpatient chemical dependency treatment program were observed the year prior to their program intake visit and followed for 3 years afterwards, to compare their medical costs and utilization to demographically matched commercially insured patients entering the same programs. The Medicaid-insured patients on average incurred medical costs 60% higher than non-Medicaid patients during the 12-month preintake period ($5402 vs $3377). [corrected] During the 3 years subsequently, however, both groups of chemical dependency patients displayed significant declines in medical costs, averaging 30% from the baseline period to the third year of follow-up. Cost trends reflected declines in use of hospital days, emergency department visits, and nonemergent outpatient visits. These results may help address concerns among Medicaid managed care providers and payers by giving a more realistic account of the long-term costs of this group of high-utilizing enrollees.
authors: Division of Research, Oakland, CA 94602, USA. larry.walter@kp.org
authors: Lawrence J
authors: LJ
authors: Walter
authors: Lynn
authors: L
authors: Ackerson
authors: Steven
authors: S
authors: Allen
mesh_terms: D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D002140:California; D002204:Capitation Fee; D016022:Case-Control Studies; D015331:Cohort Studies; D005260:Female; D017048:Health Care Costs / Q000706:statistics & numerical data / Q000639:trends*; D006279:Health Maintenance Organizations / Q000191:economics* / Q000706:statistics & numerical data; D006302:Health Services Research; D006801:Humans; D015273:Insurance Selection Bias; D008297:Male; D008484:Medicaid / Q000191:economics* / Q000706:statistics & numerical data; D009939:Organizations, Nonprofit / Q000191:economics / Q000706:statistics & numerical data; D015397:Program Evaluation; D012189:Retrospective Studies; D016320:Substance Abuse Treatment Centers / Q000191:economics* / Q000706:statistics & numerical data; D019966:Substance-Related Disorders / Q000191:economics* / Q000628:therapy