Associate Physician Emergency Medicine, Massachusetts General Hospital

Clinicn Investigator, Full Prf Emergency Medicine, Mass General Research Institute

Professor of Emergency Medicine Harvard Medical School

PhD Tokai University School of Medicine 2022

MS (Computational Biology) Harvard School of Public Health 2021

MD Tokai University School of Medicine 2004

MPH Harvard School of Public Health 2012

MBA Massachusetts Institute of Technology (MIT) 2024

asthma; bronchiolitis; cellular immunology; genomic epidemiology; metabolomics; microbiome; proteomics; systems biology; vaccinology; virology

Kohei Hasegawa, MD, MPH, PhD is an attending physician at the MGH Department of Emergency Medicine and a Full Professor at Harvard Medical School. He received his MD/PhD from Tokai University (Japan) and MS (Computational Biology) and MPH degrees from Harvard University. Dr. Hasegawa completed his emergency medicine residency and research fellowship at Massachusetts General Hospital.


Dr. Hasegawa is an active clinician-scientist with 250+ original research publications and multiple NIH R01 grants, related to respiratory virus infection, immunology, and computational biology.  In addition to these original research papers, he has published more than 50 reviews, textbook chapters, and editorials. He is the founder/director of the Japanese Emergency Medicine Network (JEMNet) and the founder/director of the Translational Research Unit of Emergency Medicine Network (EMNet), multi-center collaborations that aim to improve public health through projects in emergency care, particularly multicenter clinical research.