Current Fellows

Charlotte Croteau, MD
2023-2025 MGH Fellow
Residency: NYU/Bellevue Emergency Medicine Residency
Medical School: Tufts University School of Medicine

Jonothan Smileye Jr., MD
2024-2026 BWH Fellow
Residency: Hospital of the University of Pennsylvania, Chief Resident PGY-4, Emergency Medicine Residency
Medical School: Howard University College of Medicine


Yonatan Keschner, MD
2020-2022 Fellow
Department of Emergency Medicine
Brigham and Women’s Hospital

Joshua Baugh, MD, MPP, MHCM
2019-2021 Fellow
Director of Clinical Operations for Emergency Medicine
Medical Director for Hospital Emergency Preparedness
Massachusetts General Hospital

Kelly 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 and Vice President of Medical Affairs
Newton-Wellesley Hospital

Brian Yun, MD, MBA MPH
2016-2017 MGH Fellow
Vice Chair of Clinical Affairs
Department of Emergency Medicine
Boston Medical Center