Ellen MacKenzie

Ellen J. MacKenzie is a Health Science professor at Johns Hopkins University Bloomberg School of Public Health, where she earned her ScM in 1975 and PhD in biostatistics in 1979, following a BA from Rutgers University in 1972. Joining the faculty in 1980, she rose to full professor in 1991, chaired the Department of Health Policy and Management from 2005 to 2016, and served as the 11th dean of the Bloomberg School from 2017 to 2025. Named a Bloomberg Distinguished Professor in 2017, she holds the Fred and Julie Soper Professorship and joint appointments in the School of Medicine's departments of Orthopaedic Surgery, Emergency Medicine, and Physical Medicine and Rehabilitation. Previously, she directed the Johns Hopkins Center for Injury Research and Policy from 1995 to 2005 and served as president of the American Trauma Society.

MacKenzie's research in Health Policy and Management centers on improving trauma care systems and policy, the impact of health services on traumatic injury outcomes, development of injury severity and outcome measurement tools, trauma system organization and performance, economic and social impacts of injuries, and factors influencing recovery and return to work. Landmark studies include the National Study on Costs and Outcomes of Trauma Care (NSCOT), demonstrating 25% reduced mortality risk in trauma centers (MacKenzie et al., New England Journal of Medicine, 2006); the Lower Extremity Assessment Project (LEAP), comparing limb salvage and amputation outcomes (Bosse et al., New England Journal of Medicine, 2002); and The Cost of Injury, estimating injury's economic burden. She established the Major Extremity Trauma Research Consortium (METRC), conducting 20 multicenter trials for extremity trauma guidelines, and developed self-management programs like Promoting Amputee Life Skills (PALS) and NextSteps for trauma survivors. Her contributions earned election to the National Academy of Medicine, recognition by the CDC as one of 20 visionary leaders in injury prevention, the American Public Health Association's Distinguished Career Award, the American Academy of Orthopaedic Surgeons' Ann Doner Vaughan Kappa Delta Award, and honorary fellowship in the American Association for the Surgery of Trauma, among others. Key publications also encompass "Estimating the prevalence of limb loss in the United States: 2005 to 2050" (Archives of Physical Medicine and Rehabilitation, 2008) and "A national inventory of hospital trauma centers" (JAMA, 2003).

Professional Email: ellen.mackenzie@jhsph.edu