Current Fellows
Matthew Bui, MD
2026-2028 Fellow
Residency: Boston Medical Center Emergency Medicine
Medical School: Boston University School of Medicine
Alumni
Johnothan Smileye Jr., MD, MHCM
2024-2026 Fellow
Associate Clinical Director of Emergency Medicine
Director of ED Observation
Brigham and Women’s Hospital
Charlotte Croteau, MD, MHCM
2023-2025 Fellow
Clinical Director of Emergency Medicine
Massachusetts General Hospital
Yonatan Keschner, MD
2020-2022 Fellow
Department of Emergency Medicine
Brigham and Women’s Hospital
Joshua Baugh, MD, MPP, MHCM
2019-2021 Fellow
Vice Chair of Clinical Affairs
Department of Emergency Medicine
Mass General Brigham
Kelley Wittbold, MD
2019-2021 Fellow
Operations Management and Digital Health
Massachusetts General Hospital
Zheng Ben Ma, MD, MHCM
2018-2020 Fellow
Assistant Medical Director of Emergency Services
Department of Emergency Medicine
Texas Medical Center
Jonathan Sonis, MD, MHCM
2017-2019 Fellow
Associate Chief Medical Officer
Vice President of Medical Affairs
Newton-Wellesley Hospital
Brian Yun, MD, MBA, MPH
2016-2018 Fellow
Vice Chair of Clinical Affairs
Department of Emergency Medicine
Boston Medical Center