I enjoy helping people stay healthy through preventative medicine, as well as treating both developing and ongoing health issues. I especially value getting to know my patients over time.

Communication is the single most important tool in medicine which I try to achieve every day.

In my free time I enjoy cooking, spending time outdoors, and being with friends and family.

I aim to improve patient’s lung health and help patients and families through critical illnesses.

I work to provide excellent care in the acute and outpatient settings, in close collaboration with other specialists and staff. I am passionate about helping everyone reach their individual health goals.

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 started practicing primary care at Boston Medical Center in 2001 and was part of the Faculty of Boston University's School of Medicine. In 2010, I transitioned to the Quincy and Braintree area to continue serving as a primary care physician and urgent care provider. I graduated from the University of Puerto Rico School of Medicine and completed my residency in Internal Medicine at the Hospital of Saint Raphael/Yale-New Haven Hospital.

My goal is to communicate effectively with patients so they have the understanding to make informed decisions for their own health. It is very humbling to work in a field that involves caring for others. I am continually inspired by my patients and the ability grow a patient-provider relationship over time.  As health care professionals, patients are the focal point of all that we do. Outside of work I enjoy being active outdoors, playing piano, and spending time with loved ones. 

My focus is to provide patients with knowledge and insight into their specific health conditions.

I pride myself on taking a patient-centered approach to building effective care plans that go beyond the diagnosis of my patients. I am a certified Physician's Assistant who graduated from MCPHS University, Boston with a Master's of Physician Assistant Studies (MPAS.) My previous experience is in primary care and outpatient cardiology. 

Originally from Western Massachusetts, I moved to the South Shore after graduation. I enjoy spending time with my friends, family, and puppy, Oakes. I am also an avid reader and beach-goer. 

Growing up, my mother was a registered nurse and both of my parents were very service-minded. They taught me to give back to the community.

I fell in love with Family Medicine in my first year at Tufts. I became inspired to treat patients on a psychological, cultural, and emotional level, rather than just as a series of physical medical conditions.  

I enjoy traveling. I lived in Scotland for a year during my residency, and I have traveled to Nicaragua several times to work on a variety of global health projects. While there, I learned to speak Spanish and love the opportunity to speak Spanish with patients here at home.

I enjoy cooking and trying foods from all over the world. I like tapping into my creative side as well, enjoying studio art, particularly oil painting and watercolors.