Dr. Raymond H. Chen, MD, DPhil, is a distinguished senior cardiac surgeon with the Southern California Permanente Medical Group (SCPMG), where he has been serving since 2004. Currently, he holds the position of Assistant Chief of the Regional Department of Cardiac Surgery. Dr. Chen earned his BA in Biochemical Sciences from Harvard University, followed by his MD from Stanford University, and a DPhil in Immunology from Oxford University.

His extensive training includes a residency in General Surgery and a Residency in Cardiothoracic Surgery at Brigham & Women’s Hospital, affiliated with Harvard Medical School where he served as chief resident in both specialties. Dr. Chen's clinical practice focuses on adult cardiac surgery, and he is certified by the Thoracic Surgery Board. He has performed over 3000 heart operations in the last 20 years.

Throughout his career, Dr. Chen has been actively involved in clinical teaching, training medical students, physician assistants, and new cardiac surgeons. His scholarly contributions include over 40 peer-reviewed research articles and presentations at national and international conferences, with a significant focus on xenotransplantation and cardiac surgery innovations. He also holds two patents related to cardiac valvular xenografts

Dr. Chen has received many honors and awards, including the John Harvard Scholarship for Academic Achievement and the Winston Churchill Scholar award at Oxford University. In addition to his professional achievements, Dr. Chen has engaged in community activities, including volunteer healthcare provision and mentorship roles with the Boy Scouts of America. He is also currently a coach with the U.S. Archery Association.