I earned my Bachelor of Science degree from Boston College and my medical degree from Loyola University in Chicago. Upon graduation from Loyola, I returned to my native Long Island to complete my residency in pediatrics at SUNY Stony Brook. Following an additional year as Chief Resident, I returned to Massachusetts to settle. Professionally, I cherish the privilege of establishing long-term relationships with my patients' families and playing a small role in assisting a child to blossom into a happy, healthy, well-adjusted adult. In my spare time, I enjoy kayaking, practicing yoga, going to the beach, and spending time with my husband and five children.
 

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.

Christopher Cannell DMSc, MPAS, PA-C practiced in acute care medicine including emergency medicine, orthopedic trauma, orthopedics, and hospitalist medicine.  He focuses holistically on the whole patient with an eye on wellness.

Dr. Cannell is a Doctoral Trained Physician Associate who as over 21 years of rich experience across the spectrum of healthcare including Emergency Medicine (CAQ advanced certification), Orthopedics (Sports, Hand, Trauma, Spine, and Joints), Critical Care, Urgent Care, and both Inpatient and Outpatient Internal Medicine. Dr. Cannell has played a pivotal role in program development and management, value-based care, and population health initiatives.  His leadership experience extends to roles such as ED department Lead APC, APC Director of large ambulatory practice, Hospital System Committee Member, program innovation, and PA/NP career ladder development. His healthcare dedication transcends beyond clinical practice, encompassing PA education, advocacy, leadership, and innovation.  

Dr. Cannell received his Doctor of Medical Science from the University of Lynchburg, his Master in Physician Assistant Studies from Massachusetts College of Pharmacy and Health Sciences-Boston, and his Bachelor of Arts in Psychology/Pre-Medical from Muhlenberg College.

As a doctor at Brigham and Women's Harbor Medical Associates, I work to maintain our commitment to delivering prompt, expert and compassionate care.

I came to medicine from the business world, and it has been incredibly rewarding to focus my energy and abilities on helping people who are acutely ill. I believe that really listening to patients and their families is the key to providing exceptional care. Outside of work, I enjoy spending time with my wife and two young children.

My job is ultimately about the trust that comes from a long-term relationship.  I am honored that people choose me to care for them and their extended families, and I do my best to give thoughtful and evidenced based advice.  Each of us has unique goals for our long term health, and I really enjoy giving people guidance in this realm.  I also enjoy the challenge of my work.  Each day is extremely diverse and forces me to stay continually current.  When I am not at work, I love competing in triathlon and cycling events, skiing, travel, and being outside.  I also adore being a father to my three daughters.