My treatment approach is centered around empowering individuals to take control of their own well-being. My focus is on providing a safe and supportive environment for my patients, enhance their self-awareness. My goal is to work collaboratively with patients to develop personalized treatment plans that address their unique  needs and goals.

I graduated from medical school in Eastern Europe. My OBGYN residency training took place in NYC at Maimonides medical Center. Outside of work, I love swimming and biking ; however, most importantly I love spending time with my family.

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. 

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 grew up on the South Shore and attended Holy Cross for college where my concentration was pre-medical sciences and sleep research. During summers in college I worked as an EMT and following college I worked in a collaborative Brigham and Women’s Hospital/Harvard Medical School lab studying allergy and asthma. While at the University of Massachusetts Medical School and Lahey Clinic my focus was on primary care internal medicine. In 2006 I was the recipient of the “Patient Care Award” which is Lahey Clinic’s highest physician honor. I joined South Shore Medical Center in 2006.

As the Medical Director of Addiction Medicine at South Shore Health, I work to tackle the defining medical challenge of our time: Substance use and alcohol use disorder.

In addition to seeing adult patients at South Shore Hospital, I work with colleagues across South Shore Health to develop and implement a comprehensive addiction medicine treatment program. This program will connect patients with the resources they need to manage substance use disorder, no matter if they come to us through the Emergency Department, primary care, or another setting. Additionally, I serve as Medical Director for Spectrum Health System's opioid treatment program, ATS/detox, CSS, and therapeutic community in Weymouth.

Prior to my work at South Shore Health, I helped launch the Bridge Clinic at Boston Medical Center, which connected patients with treatment options for substance use disorder. I also served as Medical Director for Spectrum Health Systems’ Opioid Treatment Program in Weymouth.

In my spare time, I enjoy baseball, reading fiction, snowboarding, and cooking.

My treatment philosophy is to provide high quality, compassionate, and patient centered care.

Throughout my career at BU Medical Center and South Shore Health, I have divided my time between healthcare administration and direct patient care. Administratively, I have focused on medical education, patient safety and quality improvement. However, my true passion for medicine is driven by the bonds I build with my patients and caring for them throughout life. 

I am a Cum Laude graduate of Tufts University, and I earned my medical degree at the Tufts University School of Medicine. I completed my surgical residency at New York Medical College, and my urological residency at Westchester Medical Center in Valhalla, NY. I came to South Shore Urology on completion of his residency. I am certified with the American Board of Urology and I am passionate about providing high quality patient care in a compassionate environment.