As a family medicine trained hospitalist, I aim to maintain a coordinative approach to the care I give. I prioritize patient education in my treatment philosophy. 

Board Certification: Radiation Oncology

Fellowship: Harvard Radiation Oncology Program, Radiation Oncology

Medical School: Harvard Medical School

An admission to the hospital can be a very stressful time, no matter what the diagnosis is. While treating a patient's condition, I believe education and communication is very important. I enjoy spending time with my patients and their family, discussing their condition, and developing a treatment plan. Outside of work, my biggest joy is my family. 

My mission is to educate and support patients to become knowledgeable and interactive in their medical management.

It is a privilege to encourage open communication and establish a trusting relationship with my patients.  I aim to empower active participation, fostering a more favorable outcome throughout their medical journey.

I believe that its a great privilege to help patients and their families and build long term relationships with them. As we all are unique, I believe that everyone's medical care should be tailored individually. communication is very important. Outside of work, I love hiking, reading and spending time with friends and family.

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.

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.