Meet our Surgeons

The Oregon Bariatric Center is served by Colin MacColl, MD and Joshua Pfeiffer, MD. Dr. MacColl is highly experienced and well trained in the field of bariatric surgery, including gastric bypass, sleeve gastrectomy, and Lap-Band procedures. Dr. Pfeiffer's clinical interests include minimally invasive surgery, as well as foregut, antireflux and hernia repair surgery.​

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Colin MacColl, MD

  • Board-certified, General Surgery
  • Fellowship: Laparoscopic Bariatric Surgery, Tufts New England Medical Center, Boston
  • Residency: University of Calgary, Alberta, Canada
  • Medical School: Medicine University of Saskatchewan, Canada
  • Fellow, American College of Surgery (ACS)
  • Member, American Society for Metabolic and Bariatric Surgery (ASMBS) 
  • Member, Society of American Gastrointestinal and Endoscopic Surgeons (SAGES)
  

Joshua Pfeiffer, MD

  • Board-certified, General Surgery
  • Fellowship: Advanced GI Minimally Invasive/Bariatric Surgery, Gundersen Health System, La Crosse, WI
  • Residency: University of Illinois, Metropolitan Group Hospitals
  • Medical School: University of Washington School of Medicine
  • Resident Member, American College of Surgery (ACS)
  • Member, American Society for Metabolic and Bariatric Surgery (ASMBS)
  • Member, Society of American Gastrointestinal and Endoscopic Surgeons (SAGES)

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