title: The impact of Medicare coverage policies on health care utilization.
abstract: OBJECTIVE
  To determine whether Medicare coverage policies affect utilization of services in Medicare.
  
  
  METHODS
  We constructed an analysis data set for eight different procedures using secondary data obtained from Medicare claims (1999-2002) and Medicare coverage policies posted on Center for Medicare and Medicaid Services website.
  
  
  METHODS
  We analyzed the impact of coverage policies using difference-in-difference approach in a regression framework.
  
  
  RESULTS
  We found that in only one case (transesophageal echocardiography) out of eight did utilization change (reduced by 13.6 percent) after the effective date of the local policies. There is no systematic pattern that policies affect utilization, and the type of coverage policy does not seem to play an important role in its impact.
  
  
  CONCLUSIONS
  Coverage policies have the potential but do not consistently impact utilization as policy makers intend and expect them to do. These findings raise significant policy questions about the effectiveness of Medicare coverage policies, which deserve further study.
authors.affiliation: Division of Health Policy and Management, School of Public Health, University of Minnesota, 420 Delaware Street, S.E., MMC 729, Minneapolis, MN 55455, USA. foote003@umn.edu
authors.forename: Susan Bartlett
authors.initials: SB
authors.lastname: Foote
authors.forename: Beth A
authors.initials: BA
authors.lastname: Virnig
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Town
authors.forename: Lacey
authors.initials: L
authors.lastname: Hartman
mesh_terms: D006291:Health Policy / Q000191:economics; D006296:Health Services / Q000706:statistics & numerical data*; D006801:Humans; D007344:Insurance Claim Reporting / Q000191:economics / Q000706:statistics & numerical data*; D007345:Insurance Claim Review / Q000706:statistics & numerical data*; D019458:Insurance Coverage / Q000706:statistics & numerical data; D006278:Medicare / Q000191:economics*; D016134:Organizational Policy; D011785:Quality Assurance, Health Care / Q000706:statistics & numerical data; D014481:United States