title: Colonoscopy practice patterns since introduction of medicare coverage for average-risk screening.
abstract: OBJECTIVE
  Recent legislation passed in July 2001 provides coverage for all Medicare beneficiaries for average-risk screening colonoscopy.
  
  
  METHODS
  We analyzed the Clinical Outcomes Research Initiative national endoscopic database to characterize colonoscopy practice patterns before and after the introduction of this coverage.
  
  
  RESULTS
  Between January 1998 and May 2002, 205,638 patients underwent colonoscopy, of whom 8.3% underwent average-risk colon cancer screening. The proportion of procedures performed for average-risk screening has increased dramatically from 4.6% (before July 2001) to 14.2% (after July 2001). With the increased volume of average-risk screening examinations, colonic lesion detection (masses and polyps greater than 9 mm) has declined (4.9% before July 2001 to 3.8% after July 2001).
  
  
  CONCLUSIONS
  There has been a dramatic increase in the rates of screening colonoscopy during the past 4 years. If rates continue to increase, optimal resource utilization will assume increasing importance.
authors.affiliation: Division of Gastroenterology and Hepatology, Charlton 8, Mayo Clinic, Rochester, Minnesota 55905, USA. harewood.gavin@mayo.edu
authors.forename: Gavin C
authors.initials: GC
authors.lastname: Harewood
authors.forename: David A
authors.initials: DA
authors.lastname: Lieberman
mesh_terms: D003110:Colonic Neoplasms / Q000175:diagnosis / Q000191:economics; D003113:Colonoscopy / Q000191:economics* / Q000639:trends; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000191:economics / Q000639:trends; D019458:Insurance Coverage / Q000191:economics* / Q000639:trends; D008297:Male; D008403:Mass Screening / Q000191:economics* / Q000639:trends; D006278:Medicare / Q000191:economics* / Q000639:trends; D008875:Middle Aged; D015999:Multivariate Analysis; D010342:Patient Acceptance of Health Care; D010818:Practice Patterns, Physicians' / Q000191:economics* / Q000639:trends; D012051:Reimbursement Mechanisms / Q000191:economics / Q000639:trends; D018570:Risk Assessment / Q000191:economics / Q000639:trends; D013997:Time Factors; D014481:United States / Q000453:epidemiology