How effective are copayments in reducing expenditures for low-income adult medicaid beneficiaries? Experience from the Oregon Health Plan

Neal T. Wallace, Kenneth (John) McConnell, Charles A. Gallia, Jeanene A. Smith

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Objectives. To determine the impact of introducing copayments on medical care use and expenditures for low-income, adult Medicaid beneficiaries. Data Sources/Study Setting. The Oregon Health Plan (OHP) implemented copayments and other benefit changes for some adult beneficiaries in February 2003. Study Design. Copayment effects were measured as the "difference-in- difference" in average monthly service use and expenditures among cohorts of OHP Standard (intervention) and Plus (comparison) beneficiaries. Data Collection/Extraction Methods. There were 10,176 OHP Standard and 10,319 Plus propensity score-matched subjects enrolled during November 2001-October 2002 and May 2003-April 2004 that were selected and assigned to 59 primary care-based service areas with aggregate outcomes calculated in six month intervals yielding 472 observations. Results. Total expenditures per person remained unchanged (+2.2 percent, p=.47) despite reductions in use (-2.7 percent, p

Original languageEnglish (US)
Pages (from-to)515-530
Number of pages16
JournalHealth Services Research
Volume43
Issue number2
DOIs
StatePublished - Apr 2008

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Medicaid
Health Expenditures
expenditures
low income
Health
health
Propensity Score
experience
Information Storage and Retrieval
medical care
Primary Health Care
human being

Keywords

  • Cost-sharing
  • Medicaid
  • Medical expenditures

ASJC Scopus subject areas

  • Nursing(all)
  • Health(social science)
  • Health Professions(all)
  • Health Policy

Cite this

How effective are copayments in reducing expenditures for low-income adult medicaid beneficiaries? Experience from the Oregon Health Plan. / Wallace, Neal T.; McConnell, Kenneth (John); Gallia, Charles A.; Smith, Jeanene A.

In: Health Services Research, Vol. 43, No. 2, 04.2008, p. 515-530.

Research output: Contribution to journalArticle

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