Photo of Kohei  Hasegawa, MD

Kohei Hasegawa, MD

  • Faculty, Emergency Medicine Network (EMNet)




Kohei Hasegawa MD, MPH is an attending physician at the MGH Department of Emergency Medicine.  He is also an Associate Professor of Emergency Medicine at Harvard Medical School.


Emergency Medicine

Clinical Interests
  • Respiratory emergencies
  • Airway emergencies
Medical Education
  • MD, Tokai University School of Medicine
  • Residency, Brigham and Women's Hospital|Residency, Tokai University Hospital|Residency, U.S. Naval Hospital
  • Fellowship, Chigasaki Tokushukai General Hospital
Board Certifications
  • Emergency Medicine
Foreign Languages
  • Japanese
  • Boston: Massachusetts General Hospital
Insurances Accepted
  • Aetna Health Inc.
  • Beech Street
  • Blue Cross Blue Shield - Blue Care 65
  • Blue Cross Blue Shield - Indemnity
  • Blue Cross Blue Shield - Managed Care
  • Blue Cross Blue Shield - Partners Plus
  • Cigna (PAL #'s)
  • Fallon Community HealthCare
  • Great-West Healthcare (formally One Health Plan)
  • Harvard Pilgrim Health Plan - ACD
  • Harvard Pilgrim Health Plan - PBO
  • Health Care Value Management (HCVM)
  • Humana/Choice Care PPO
  • MassHealth
  • Medicare
  • Medicare - ACD
  • Neighborhood Health Plan - ACD
  • Neighborhood Health Plan - PBO
  • OSW - Connecticut
  • OSW - Maine
  • OSW - New Hampshire
  • OSW - Rhode Island
  • OSW - Vermont
  • Private Health Care Systems (PHCS)
  • Railroad Medicare
  • Senior Whole Health
  • TriCare
  • Tufts Health Plan
  • Unicare
  • United Healthcare (non-HMO) - ACD
  • United Healthcare (non-HMO) - PBO

Note: This provider may accept more insurance plans than shown; please call the practice to find out if your plan is accepted.

Patient Age Group
Adult and Pediatric


Dr. Kohei Hasegawa is an attending physician at the MGH Department of Emergency Medicine. He received his medical degree from Tokai University (Japan) and Master of Public Health degree from Harvard University.  Dr. Hasegawa completed his emergency medicine residency and research fellowship at Massachusetts General Hospital. Dr. Hasegawa is additionally an Associate Professor of Emergency Medicine at Harvard Medical School.

Dr. Hasegawa is an active clinician-scientist. He is the founder/director of the Japanese Emergency Medicine Network (JEMNet) and a faculty member of Emergency Medicine Network (EMNet), multi-center collaborations that aim to improve public health through projects in emergency care, particularly multicenter clinical research.

Research & Publications

Research Summary

Dr. Hasegawa has made significant contributions to the field of airway and respiratory emergency research. He has assembled a team of researchers from more than 50 centers to conduct several large-scale studies of emergency airway management and acute asthma management in the US and Japan.

He has published >100 peer-reviewed articles since 2012. His published manuscripts include first-author publications in the journals, such as JAMA, JACI, JACC, AJRCCM, Annals of Emergency Medicine, and Pediatrics.  In addition to these original research papers, he has published more than 40 reviews, textbook chapters, and editorials.


View my most recent publications at PubMed

News & Events


Emergency Medicine**
55 Fruit Street
Boston, MA 02114-2696
Phone: 617-724-4100

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