Board Certification: Radiation Oncology

Residency: Harvard Radiation Oncology Program, Radiation Oncology

Medical School: Stanford University School of Medicine

I consider myself lucky to do something that I love. Children and teens are great at reminding adults about the little joys of life while also presenting us with various medical and behavioral challenges. I enjoy navigating these challenges with each family to find the right approach for their child. Outside of work, I love spending time with my husband and three (lovable and challenging) children. I enjoy running with my dog, biking, swimming, skiing, and occasionally a good day of yard work. 

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.

I have had the pleasure of practicing in surgical specialties in community-based hospitals over the last several years. I love working in community hospitals because it is small enough to give patients personalized care but also large enough to provide the best specialized care. Outside of work, I enjoy baking, taking care of my chickens and hiking.

My philosophy is to always take the time to listen to the patient's concerns and do my best to address them.

I provide comprehensive care to vascular patients. This ranges from the treatment of peripheral arterial disease, venous insufficiency and aneurysms, as well as hemo dialysis access.

I also have advanced wound care certification, as well as a board certification in Hyperbaric Oxygen Therapy.

It is a privilege to help people and establish long-term relationships with my patients. 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. 

I enjoy traveling to difference parts of the country and sampling unique cultures and cuisine. Having grown up in the Boston area, I enjoy watching sports with the local teams, and playing golf.

I developed an interest in pediatrics early in my medical career and continue to love working with children. I have the privilege of getting to know patients well by following them through infancy, childhood, and adolescence. Outside of work, I enjoy spending time with my family and friends, traveling and exploring Boston.