As an admitting hospitalist, my focus is to facilitate a smooth transition between the emergency department and the inpatient  admission. 

Waiting to be admitted to the hospital can be nerve wracking, emotional, and even scary. My goal is to ease  your transition from waiting in the ER to being admitted, explain your condition, and answer all questions you may have. Raised and educated locally, it is my pleasure to serve this wonderful community of people who call the South Shore home. In my free time, I enjoy traveling, spending time with family and friends, and exploring/discovering all that the area has to offer.   

I graduated from Colegio Nacional de San Isidro in Buenos Aires, Argentina and completed my medical degree at Buenos Aires University School of Medicine. My surgical and urological residency were spent at the Hospital Italiano in Buenos Aires. I was an attending Urologist at Hospital Roffo in Buenos Aires until I came to the United States. At that point I was a Urology Fellow working on a research project at the Children’s Hospital and Harvard Medical School in Boston. I completed his American residencies in urology and surgery at the University of Massachusetts.

I enjoy spending time with my wife and three children.

In my career as an emergency physician, I have gotten to take care of patients in both the usual emergency department setting as well as some other unusual environment. Regardless of the location, one thing remains the same - it is about the patient and the care they need at a time of medical crisis. I spend most of my time outside of work, still engaged in medicine with a variety of emergency response organizations as well as the military.

I take great pride in the opportunity to improve patients' lives. Everyone has their own story and I do not view patients as defined by their age or conditions. I seek to work with the individual in order to help them be better. Outside of work, I enjoy golf and spending time with my family. 

I provide comprehensive care to vascular patients. This ranges from the treatment of peripheral arterial disease, venous insufficiency and aneurysms, as well as hemo dialysis access.

I also have advanced wound care certification, as well as a board certification in Hyperbaric Oxygen Therapy.

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. We all have unique characteristics that need to be considered when deciding a treatment plan. Communication is paramount. 

I enjoy traveling to difference parts of the country and sampling unique cultures and cuisine. Having grown up in the Boston area, I enjoy watching sports with the local teams, and playing golf.

My goal is to provide patients with a deep understanding of their problem and work together to get the best results possible. 

What I love about orthopedic surgery is the ability to make a profound impact on the quality of life of my patients. No two shoulders are the same, so I think it is crucial to spend time talking with patients to understand their presentation and come up with a treatment plan. Technology is ever evolving and I think it is important to integrate that into my practice to ensure great outcomes. Outside of work I enjoy spending time with my family and going to the beach.

I strive to build a space where patients feel safe to discuss their health concerns and engage in shared decision-making.

Prior to joining South Shore Health, I had the privilege to train at UMass Family Medicine Residency and complete an additional year of fellowship to also care for patients living with HIV/viral hepatitis at the Family Health Center of Worcester.

Outside of work, I love spending time with my family, running, gardening, and camping/hiking.

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.