Dr. O John Ma's passion for medicine did not fade with him, and he is currently actively updating many of the journals he contributed to. The fourth edition of Ma and Mateer's Emergency Ultrasound, published in 2020, contained significant advancements in using ultrasound to detect COVID-19.

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John Ma's commitment to patient safety and high-quality clinical treatment helped him win the position of chair on the OHSU Professional Board. He also served as president of the executive medical committee.

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In the 12 years between 2007 and 2019, Oregon expanded emergency treatment from one staffed emergency department to five. During this time, the budget climbed from $10 million to $28 million, allowing for more significant investment in technology and patient care enhancements.

Ma has funded emergency medicine residency programs for other physicians and developed novel entrepreneurial and humanitarian endeavors.

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On numerous occasions, Dr. John Ma has been designated a top doctor by Portland Monthly Magazine. He was awarded the OHSU Golden Rose in 2009 for his work in the emergency department and the Pillar of Excellence award for people development that same year. He was consistently acknowledged as an outstanding physician at Truman Medical Center and received honors from several emergency medicine instructors of the year.

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Dr. O John Ma has a variety of stimulating hobbies and interests. He appreciates the golf field's difficulties and new eating experiences in New York City. In his spare time, he enjoys visiting museums in and around New York City and international travel.

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He also previously worked as a sportswriter and has professional-level expertise in golf courses.