My treatment philosophy is to establish good rapport with patients during their difficult moments, and to focus on shared decision-making while working on treatment plans and management of acute issues.

I have been practicing medicine for more than 20 years now. I like communicating with patients while focusing on their medical issues and helping formulate plans to meet the treatment needs. Apart from medicine, I enjoy spending time with my two boys, cooking and baking. I am an avid nature lover and enjoy hiking. Exploring new places brings me true happiness. Yoga and meditation helps me unwind after hectic days. 

My treatment focus is to ensure that each and every patient receives the best care and that their care plan is tailored to meet their individual needs and diagnosis. 

I believe that working with hematology and oncology patients is a calling and it is truly an honor to be a part of each patient’s care. It is extremely important that every patient have a treatment plan that fits their diagnosis and needs, and that this plan is communicated clearly with all members of the treatment team.

Outside of work, I enjoy reading, hiking, and walking the beach.

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 strive to provide high quality, safe, comprehensive anesthesia services and care to all my patients in the perioperative period. 

In the 8 years that I have been practicing anesthesia, I am resolute in my belief that creating and fostering a team environment with effective communication is crucial to developing an atmosphere of trust and the key to providing high quality care inside and outside of the OR with patients and colleagues alike.  As a collegiate athlete and previous marketing manager in my first career, I try to bring these skills and values into the OR and Anesthesia department. Outside of work, I love recreating in the outdoors. From snowboarding, hiking, biking, to waterskiing, beach lounging and lake time with my family, I love it all. Most importantly I love spending time with my husband and two daughters.