Omar S. Darwish
Biography
Omar S. Darwish, D.O., M.Sc., is Health Science Associate Clinical Professor Step 4 in the Department of Medicine and Director of ED Hospitalist in the Hospitalist Program at the University of California, Irvine. An accomplished physician-researcher in the field of internal medicine, Darwish has focused his clinical and research efforts on cardiovascular medicine, point-of-care ultrasound, sepsis management, and anticoagulation therapy throughout his career at UCI.
Darwish earned his Doctor of Osteopathic Medicine degree from Touro University of Osteopathic Medicine in 2007 and completed his Master of Science in Organic Chemistry from The Ohio State University in 2003. He completed his internal medicine residency at St. Mary Medical Center, affiliated with the David Geffen School of Medicine at UCLA, where he served as Chief Resident from 2010-2011. Darwish has published 13 peer-reviewed articles in journals including the Journal of Hospital Medicine, Journal of Ultrasound Medicine, and Chest, with particular recognition for his systematic reviews and meta-analyses on cardiac troponins in pulmonary embolism and inferior vena cava ultrasound in acute heart failure diagnosis.
Darwish serves as Director of the Morbidity & Mortality Conference for the Department of Medicine and Coordinator of the Hospitalist Grand Rounds at UCI. He has received multiple grants totaling $45,000 for sepsis simulation training and point-of-care ultrasound curriculum development. Darwish holds a U.S. patent for a magnetic stethoscope holder and serves as CEO of steth 'n go, LLC. He is board-certified by the American Board of Internal Medicine and maintains active membership in the American College of Physicians.
Return to topEducation
- B.S. in Chemistry, The Ohio State University, 2001
- M.Sc. in Organic Chemistry, The Ohio State University, 2003
- D.O., Touro University of Osteopathic Medicine, 2007
Distinctions
- 2nd Place Venture Competition in Consumer Products, 2019
- Outstanding Resident in Ambulatory Medicine, 2010
- Teaching Recognition Award, 2010
Areas of Expertise
- Internal Medicine
- Anticoagulation Therapy
- Point-of-Care Ultrasound
- Sepsis Management
- ECG-Based AI Screening
- Thrombotic Microangiopathy
- Hyperkalemia Treatment
Recent Publications
- Meyer A, Uchida K, Nguyen M, Vongbunyong K, Ren D, Hanna R, Tran M, Darwish O, “Cholecystectomy-induced thrombotic microangiopathy (TMA) in a postpartum patient successfully treated with eculizumab: a case report”, J Med Case Rep, vol. 18, no. 1, pp. 610, 2024.
- Canas AE, Troutt HR, Jiang L, Tonthat S, Darwish O, Ferrey A, Lotfipour S, Kalantar-Zadeh K, Hanna R, Ling Lau W, “A randomized study to compare oral potassium binders in the treatment of acute hyperkalemia”, BMC Nephrology, vol. 24, pp. 89, 2023.
- Darwish OS, Mahayni A, Kataria S, Zuniga E, Zhang L, Amin A, “Diagnosis of Acute Heart Failure Using Inferior Vena Cava Ultrasound. Systematic Review and Meta Analysis”, J Ultrasound Med, vol. 9999, pp. 1-12, 2020.
- Jung Y, Darwish OS, “Acquired Fanconi Syndrome from Ifosfamide”, Int J Case Rep Ther Stud, vol. 2, pp. 013, 2020.
- Darwish OS, Mahayni A, Patel M, Amin A, “Cardiac Troponins in Low-Risk Pulmonary Embolism Patients. A Systematic Review and Meta-Analysis”, J Hosp Med, vol. 13, no. 7, pp. 509, 2018.
- Darwish OS, “Tamponade of a True Heart”, Clin Med Img Lib, vol. 2, pp. 030, 2016.
- Darwish OS, “Perspective: Present people, not disease”, ACP Hospitalist, 2016.
- Singson S, Kim R, Darwish OS, “A Rare Cause of Ascites: Putting the Pieces of the Puzzle Together”, Gastroenterol, vol. 151, no. 3, pp. e10-2, 2016.
Contact Information
Email: odarwish@uci.edu
Phone: (714) 456-1923
Address: Department of Medicine, Hospitalist Program, University of California, Irvine, 333 City Blvd. Suite 500, Orange, CA 92868
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Last updated on 3/31/2026.