My mission is to teach patients about health prevention and the importance of being proactive and taking active measures to mitigate the risk of future health related problems. 

It is a privilege to be able to be in a career that focuses on health prevention, maintenance, and the treatment of acute and chronic disease processes. I believe that as a nurse anesthetist we should provide our patients with the highest level of care. This care must be individualized and needs to involve the patient as an integral member of the health team. 

When I am not at work, I enjoy spending time with my wife, Ashley, and two boys: Beckham and Preston. We enjoy traveling together and being outside. Besides my family, I enjoy reading, exercising, and playing golf/tennis. 

My mission is to help women get to the root cause of their symptoms and lead an optimal and healthy life.

I am passionate about working with patients to help them live their optimal life. I have gone back to further my education in integrative and functional medicine so that I may have more tools in my toolbox to do so. Outside of work I spend time enhancing my own health journey and being with my family.

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.