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Dr. O John Ma

Dr. O John Ma served as Professor and Chair of Emergency Medicine at Oregon Health & Science University from 2007 and 2019. Dr. O John Ma was the President of the OHSU Healthcare Professional Staff from 2011 to 2013. Dr. O John Ma was the Chief Executive Officer and Co-Founder of Innovative, Disruptive, and Emerging Applications in Emergency Medicine (IDEA-EM). Dr. O John Ma has edited more than a dozen reference textbooks, including Ma and Mateer's Emergency Ultrasound and Tinitnalli's Emergency Medicine, which have been translated into more than ten languages. Dr. O John Ma's research focuses mostly on the use of ultrasonography to diagnose injuries in trauma patients. He has previously served on the boards of directors of both the American Board of Emergency Medicine and the Society for Academic Emergency Medicine. He has been named Teacher of the Year four times and earned the SAEM's Excellence in Ultrasound Education Award in 2005.



  • Dr. O John Ma

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