William Tollefsen, MD is the EMS and MIH Medical Director for South Shore Health. Dual-boarded in Emergency Medicine and EMS Medicine, Dr. Tollefsen works clinically as an Emergency Physician at South Shore Health in addition to his role as EMS Medical Director.

One of few physicians in the country to receive the prestigious "FAEMS" recognition, Dr. Tollefsen is also the Medical Director for OEMS Region IV, serving 61 cities and towns of the Metro-Boston EMS Council. As the current EMS Medical Director for eight municipal and three private ambulance services on the South Shore, Dr. Tollefsen interacts and provides oversight for over 400 Paramedics.

Dr. Tollefsen graduated from New York Medical College and completed residency training in Emergency Medicine at Harvard University, Brigham and Women's, and Massachusetts General Hospital. He completed a fellowship in Emergency Medical Services and Critical Care Transport at the University of Massachusetts, where he worked as an Emergency Physician and Flight Physician for UMASS LifeFlight. He completed an MBA at the Isenberg School of Management at UMASS Amherst, and holds a Master of Medical Science degree from the Boston University School of Medicine.

A former pre-hospital provider, he is actively involved in EMS system design, paramedic education and Critical Care Transport Systems. He works closely with multiple EMS, Fire and Law Enforcement agencies throughout Massachusetts.

His research interests include systems of care, resuscitation, airway management, and paramedic education.

My philosophy is to have each patient feel safe and comfortable during their visits as we work together to obtain optimal women's health. 

I enjoy seeing patients on an ongoing basis and strive to develop long-term relationships that will allow me and my nurse practitioners to tailor our medical care for each individual patient's needs. We see patients in a setting that tries to foster a relaxed and friendly approach to patient care.

I am certified in menopause management as well as robotic surgery. I value being able to offer women information to assist them with transition through menopause. In addition, I have worked hard to make sure that women in the South Shore area have access to minimally invasive surgery and all it's benefits by offering robotic surgery to my patients. My nurse practitioners are especially adept at handling the needs of youth with their contraceptive needs, etc.