I strive to help patients attain the best health possible; have full understanding of their health issues; and equip them to take partnership in managing their health.

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. 

I am the Medical Director of Population Health for South Shore Health and divide my time between administration and patient care. My administrative interests include integration of care, professional development, and community centered program development. I value long-term relationships with my patients and find it a privilege to care for patients over their lifespan.

My philosophy is to have each patient feel safe and comfortable during their visits as we work together to obtain optimal women's health. 

I enjoy seeing patients on an ongoing basis and strive to develop long-term relationships that will allow me and my nurse practitioners to tailor our medical care for each individual patient's needs. We see patients in a setting that tries to foster a relaxed and friendly approach to patient care.

I am certified in menopause management as well as robotic surgery. I value being able to offer women information to assist them with transition through menopause. In addition, I have worked hard to make sure that women in the South Shore area have access to minimally invasive surgery and all it's benefits by offering robotic surgery to my patients. My nurse practitioners are especially adept at handling the needs of youth with their contraceptive needs, etc. 

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.

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.

As the nurse practitioner navigator of the Lower Limb Preservation Team, it is my privilege to help patients with complex wounds navigate our healthcare system. We are dedicated to promoting prevention, maintenance, and treatment of acute or chronic wounds. Along with other dedicated providers, I strive to ensure that each patient is educated in the healing and disease process and understands prevention of wound re-occurrence. In my role, it is vital that each individual is connected with the right care at the right time to promote wound healing. With almost 20 years of experience it is my privilege to bring my skills, knowledge and hardworking ethics delivered with empathy to the South Shore Community.

It is a privilege to help people in need get back to being healthy. Individualized care plans and communication are paramount to practicing medicine, I strive to provide the care patients need. Outside of work, I like to try new sports and spend time with family; diligently working to excel in golf.