The mission of the Office of the Chief Medical Officer (OCMO) is to lead and support our expert faculty and staff in order to deliver the highest quality of care aligned with Brigham and Women’s Hospital ongoing efforts towards a culture of inclusion and belonging.
The Office of the Chief Medical Officer at Brigham and Women’s Hospital provides leadership and integration, linking all aspects of care delivery areas in ambulatory, in/outpatient services, and care continuum.
The OCMO consists of the following departments:
Dr. Paul Chen is the Associate Chief Medical Officer and Vice President of Medical Affairs at Brigham and Women’s Hospital and is an Assistant Professor of Emergency Medicine at Harvard Medical School.
Dr. Chen joined the Brigham Emergency Medicine faculty in 2015 and continues to practice in the Brigham family of Emergency Departments (EDs). He has held numerous leadership roles in Emergency Medicine, most recently the vice chair of Clinical Affairs in 2023. In addition, he has served as medical director for the BWH ED and associate chief of the BWFH ED. His leadership expertise has extended to every area of Emergency Medicine clinical activities, including quality and process initiatives, IT structures, staffing and scheduling, and cross-departmental and hospital programs. Dr. Chen has served as director of the MGB Fellowship in Emergency Medicine Administration and teaches in the International Emergency Department Leadership Institute.
A native of Chattanooga, TN, Dr. Chen is a graduate of Amherst College and Tufts University School of Medicine, where he obtained his MD and MBA. He completed his residency in Emergency Medicine and served as chief resident at New York-Presbyterian Queens. In 2016, 2021 and 2023, Paul was recognized by his peers with the Ron M. Walls Faculty Leadership Award, which acknowledges a faculty member who is fundamental to the success of the department and serves as a role model to the hospital community.
Marissa Cauley, PA-C, serves as the Chief Advanced Practice Provider Officer at Brigham and Women’s and Brigham and Women’s Faulkner Hospitals and is a practicing hospitalist physician assistant.
Marissa began her career in advanced practice at Massachusetts General Hospital (MGH) in Cardiac Surgery in 2006, transitioning to BWH in 2011 as part of the Hospital Medicine service. For over a decade, she was Co-Chief of the PACE Hospital Medicine team, where she led exponential growth of the service, played a key role in advancing quality improvement and operational initiatives, and served as the PA Co-Dyad Leader for BWH inpatient services during the COVID-19 pandemic. In 2020, she was honored with the BWH Distinguished Physician Assistant Award and became the first PA at BWH to serve as a Unit Medical Director within the Hospital Medicine Unit.
Marissa has also contributed to the Massachusetts Association of Physician Assistants (MAPA), serving two terms as Director-at-Large. Since 2022, Marissa has served as Senior Director of BWH PA Services, overseeing and advancing a community of nearly 600 physician assistants—the largest group of PAs in the MGB system and in New England.
A Massachusetts native, Marissa is a graduate of Boston University and the Quinnipiac University Physician Assistant Program. At BWH, she completed the CPIP and Brigham Leadership Programs.
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