Photo of Timothy K. Liem, M.D., M.B.A., F.A.C.S.

Timothy K. Liem M.D., M.B.A., F.A.C.S.


Dr. Timothy Liem is a professor of surgery at OHSU where he is a vice-chair for quality in the OHSU Knight Cardiovascular Institute. He received an undergraduate degree in biomechanical engineering from the University of California at San Diego, and he received his medical degree from the University of Southern California. He completed his general surgery training at Kaiser Foundation Hospitals, and his vascular surgery residency at the University of Missouri-Columbia. In 2015, he received his MBA in healthcare management from OHSU. Dr. Liem is board-certified in general surgery and vascular surgery. He is a member of the Society for Vascular Surgery, the Midwestern Vascular Surgical Society, the Western Vascular Society, the International Society for Thrombosis and Haemostasis, and Alpha Omega Alpha. He is on the editorial board and a reviewer for numerous medical journals, and has authored or co-authored over 80 book chapters and peer-reviewed articles. He lectures across the country on topics including venous thromboembolism, anticoagulation and venous duplex imaging. Dr. Liem sees patients in the OHSU Vascular Surgery Clinic at the Physician’s Pavilion, and in the Vein Clinic at South Waterfront.

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Areas of interest

  • Venous disease, thromboembolic disorders, cerebrovascular disorders, peripheral artery disease, aneurysm diseases


  • B.A., University of California, San Diego, Jacobs School of Engineering, Bioengineering, La Jolla California 1986
  • M.D., University of Southern California, Los Angeles California 1990
  • M.B.A., Oregon Health & Science University, Portland Oregon 2015
  • Residency:

    • General surgery, Kaiser Foundation Hospitals, Los Angeles, Calif., 1990-1995
    • Vascular surgery, University of Missouri, Columbia, Mo., 1995-1997
  • Certifications:

    • General Surgery, Vascular Surgery, American Board of Surgery

Honors and awards

  • Alpha Omega Alpha
  • Distinguished Fellow, Society for Vascular Surgery
  • Distinguished Service Award, Department of Surgery, OHSU
  • Award for Outstanding Contribution in Clinical Care Quality, Professional Staff, OHSU

Memberships and associations

  • Fellow, American College of Surgeons


  • "Heparin-bonded grafts induce platelet aggregation in the presence of heparin-associated antiplatelet antibodies" Journal of Vascular Surgery  1998
  • "Discussion" Journal of Vascular Surgery July 2011
  • "Randomised controlled trial" Evidence-Based Medicine  2014
  • "Management of venous disease in patients with thrombophilia" Vascular Disease Management November 2011
  • "Aortic aneurysm sac pressure measurements after endovascular repair using an implantable remote sensor" European Radiology May 2008
  • "Small bowel motility and transit after aortic surgery" Journal of Vascular Surgery July 2002
  • "Duplex imaging of residual venous obstruction to guide duration of therapy for lower extremity deep venous thrombosis" Journal of Vascular Surgery: Venous and Lymphatic Disorders July 1 2015
  • "Peripherally inserted central catheter usage patterns and associated symptomatic upper extremity venous thrombosis" Journal of Vascular Surgery March 2012
  • "Isolated calf muscular vein thrombosis is associated with pulmonary embolism and a high incidence of additional ipsilateral and contralateral deep venous thrombosis" Journal of Vascular Surgery: Venous and Lymphatic Disorders January 2013
  • "Paroxysmal nocturnal hemoglobinuria" Annals of Vascular Surgery January 2014
  • "Commentary on "carotid artery stenting in the SPACE and EVA-3S trials" Perspectives in Vascular Surgery and Endovascular Therapy  2008
  • "Adjunctive renal artery revascularization during juxtarenal and suprarenal abdominal aortic aneurysm repairs" American Journal of Surgery May 2010
  • "The sartorius muscle flap" American Journal of Surgery May 2009
  • "Nasal methicillin-resistant Staphylococcus aureus colonization is associated with increased wound occurrence after major lower extremity amputation" Journal of Vascular Surgery August 1 2015
  • "SBAR M&M" American Journal of Surgery January 2012
  • "Predictors of healing and functional outcome following transmetatarsal amputations" JAMA Surgery September 2011
  • "Medical comorbidities but not interventions adversely affect survival in patients with intermittent claudication" Journal of Vascular Surgery December 2013
  • "A comparison of the hemodynamic and ventilatory effects of abdominal insufflation with helium and carbon dioxide in young swine" Journal of Pediatric Surgery February 1996
  • "Management of catheter-associated upper extremity deep venous thrombosis" Journal of Vascular Surgery: Venous and Lymphatic Disorders April 8 2015
  • "Favorable early outcomes for patients with extended indications for thoracic endografting" Heart Surgery Forum August 2009
  • "Incidence and outcomes of intraoperative vascular surgery consultations" Journal of Vascular Surgery July 1 2015
  • "Evaluation of distributed practice schedules on retention of a newly acquired surgical skill" American Journal of Surgery January 2011
  • "The role of heparin-associated antiplatelet antibodies in the outcome of arterial reconstruction" Journal of Vascular Surgery  1999
  • "Outcomes of open operation for aortoiliac occlusive disease after failed endovascular therapy" JAMA Surgery September 2012
  • "Lepirudin is a safe and effective anticoagulant for patients with heparin-associated antiplatelet antibodies" Journal of Vascular Surgery July 2001
  • "Characterizing resolution of catheter-associated upper extremity deep venous thrombosis" Journal of Vascular Surgery January 2010
  • "A fresh cadaver laboratory to conceptualize troublesome anatomic relationships in vascular surgery" Journal of Vascular Surgery April 2012
  • "Endovascular management of Paget-Schroetter syndrome" Vascular September 2007
  • "Duplex criteria for native superior mesenteric artery stenosis overestimate stenosis in stented superior mesenteric arteries" Journal of Vascular Surgery August 2009
  • "Lower extremity autologous vein bypass for critical limb ischemia is not adversely affected by prior endovascular procedure" Journal of Vascular Surgery  2014

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