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 mission is to engage patients to participate in their medical management.

I enjoy establishing long-term relationships with my patients to enhance their participation in their plan of care.

My mission is to care for all patients wisely, fairly, and with respect.  

I work hard to provide the best emergency care to the greatest number of patients, and to treat every patient with the respect and importance that they deserve.

My philosophy is to engage patient is their own care.

I completed my residency at Cambridge Health Alliance in Cambridge, MA, often caring for underserved populations and immigrants.  I believe in engaging the patient in their own care and understanding any difficulty they may have in caring for themselves.

It is a privilege to help people,and manage and coordinate exceptional patient care in the hospital. I believe that everyone's medical care should be individually tailored. We all have unique characteristics that need to be considered when deciding a treatment plan. Communication is paramount. Outside of work, I love reading and spending time with my family.

My focus is to provide high quality health care and excellent communication with my patients. 

I have worked clinically as a PA since 2014 in a variety of health care settings including hospitals, clinics, and subacute rehabs. This has provided me a deeper understanding of the healthcare system and the trajectory of the patient experience across multiple healthcare settings. Outside of work, I love music, traveling, and food.

My mission is to educate patients on their health conditions and provide personalized care to patients and their families.

I am passionate about providing the best possible care to patients. Entering the hospital can be a scary and stressful time for patients and their families. As a provider, I hope to ease this transition and cater to patient’s physical and emotional needs. Outside of work, I enjoy spending time outdoors, hiking, exercising, and spending time with my family.

It is a privilege to help people in need get back to being healthy. Individualized care plans and communication are paramount to practicing medicine, I strive to provide the care patients need. Outside of work, I like to try new sports and spend time with family; diligently working to excel in golf.

I went into family medicine in order to have long-term relationships with my patients, and I find this to be one of the most rewarding aspects of my career.  I enjoy working with patients of all ages and working together with multigenerational families.  Outside of medicine, my interests include running, biking, skiing, and travel.  Most importantly, I love spending time with my family.

My mission is to provide culturally competent, evidence-based, and compassionate care to improve the quality of life of all of my patients. 

Medical care that not only tends to patients’ physiological ailments but imparts a sense of emotional comfort is the preeminent force in my practice. I completed my training at Tufts University School of Medicine, where I received a Masters Degree in Medical Science and another Masters Degree in Public Health.