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.

I joined the South Shore Hospital medical staff in 2014.  With lifelong ties to the South Shore community, I know the community well and highly value informed and timely communication among medical specialists and primary care to promote and expedite the care of my patients.

In addition to treating patients, I also teach resident doctors in training and volunteer my time with the Podiatry profession's state society.  Ensuring the growth and future of Podiatry, in a complex world of health care, are critical to meet the needs of our population.

My philosophy is to develop an ongoing patient-physician relationship focused on comprehensive health care incorporating preventative care, chronic disease management, and treatment of acute illnesses and injuries.

As a family doctor, I am dedicated to treating the whole person. I aim to develop long-term relationships to understand each patient, and to provide continuing health care for the individual and family. I integrate care for patients of all genders and every age from newborns to seniors, and I advocate for the patient in our complex health care system. I have had the fortune to work as a general practitioner in New Zealand which allowed me to gain insight into alternative health care systems and approaches to preventative care and disease management. Outside of work, I enjoy traveling, cooking, and reading.

Liana MacDonald is a Women’s Health Nurse Practitioner. She graduated from Regis College with a Master of Science in Nursing in 2020. She obtained her Bachelor of Science in Nursing from the University of Massachusetts Boston in 2016 and began her nursing career in the Emergency Department. She has been working as a Labor and Delivery nurse since 2019.

Liana is passionate about health equity and eliminating the gap in care amongst different races and ethnicities. She is proud of her focus on adolescent health, substance use disorders in pregnancy, and trauma-informed care.  

When not at work, Liana can be found spending her time with family, friends, and her rescue dog. She loves to travel to new cities and countries and learn about different cultures. She also loves to give back to her community.

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.

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 believe that the relationship between patient and doctor should always be collaborative; it is the providers role to imbue knowledge and guidance, but concomitantly, give the patient agency in a combined decision-making process.

I believe wholly in health equity and the belief that we all deserve a fair and equal chance at leading a healthy life - a chance that should be unfettered by socioeconomic status, culture or creed. I believe that the treatment of an individual should be holistic in approach and because of this, I tend to build deep and lasting relationships with my patients. Even the highest medical acumen is deemed useless without rapport and essential communication with the patient. Having the opportunity to live in many different areas of the world has exposed me to different demographics, cultural settings and clinical maladies. Because of this, I think I am able to provide a unique scope of medicine that can better serve my patients. I have worked in both urban and suburban settings - providing health care to some of our communities most underserved - and I have also provided medical support in the international setting. Prior to medicine, I worked in academic research as a virologist studying Ebola virus. My time doing science research helped further cultivate my love and understanding for disease processes from a fundamental and physiological standpoint, allowing me to better understand and identify treatment modalities in the clinical setting. I originally hail from New York but I have been many places since. I have a vast sneaker collection that only out preforms my record collection, I love riding my bike and I am almost a blue belt In Brazilian Jiu Jitsu. I travel as much as possible, cook whenever I can, and I love staying active with surfing, snowboarding, and running. Occasionally, I even read book here and there, and I love my two cats Roger and Tio.