Medical Expert Experience
Dr. Stephen J. Sebastian is a board-certified Emergency Medicine physician with over 30 years of clinical experience. He currently serves as a Staff Physician in the Department of Emergency Medicine at Health Alliance Leominster Hospital in Massachusetts, a position he has held since 2006.
Dr. Sebastian has held a range of leadership and academic roles, including Assistant Chair of Emergency Medicine at Saint Vincent Hospital and Assistant Residency Director at the University of Massachusetts Medical Center. He also served as a Life Flight Physician, demonstrating his depth of expertise in high-acuity emergency care.
His background includes extensive work in both urban hospitals and community settings, as well as telemedicine collaboration with CVS. Dr. Sebastian brings a strong foundation in clinical leadership and a long-standing commitment to emergency care delivery and innovation.
Education
University of Vermont, Burlington, VT B.A. Zoology, Chemistry Concentration, 05/83 Honors: Dean’s List, National Honor Society
Boston University School of Medicine / School of Public Health, Boston, MA M.D./M.P.H., 05/89 Focus: Health Services, Policy, Ambulatory Care, Epidemiology
University of Massachusetts Medical Center, Worcester, MA Residency, Emergency Medicine, 07/89 – 06/92
Honors and Awards
Teacher of the Year, Emergency Medicine Residency Program (1994), UMass Medical Center
America’s Best Doctors – Emergency Medicine Specialist (2020)
Board Certifications
American Board of Emergency Medicine
