I started practicing primary care at Boston Medical Center in 2001 and was part of the Faculty of Boston University's School of Medicine. In 2010, I transitioned to the Quincy and Braintree area to continue serving as a primary care physician and urgent care provider. I graduated from the University of Puerto Rico School of Medicine and completed my residency in Internal Medicine at the Hospital of Saint Raphael/Yale-New Haven Hospital.

Dr. O'Brien is Medical Director of Maternal-Fetal Medicine at South Shore Health. 

As a Maternal-Fetal Medicine physician, I am dedicated to caring for women and families navigating high-risk and medically complex pregnancies with expertise, compassion, and individualized attention. 

I strive to integrate evidence-based medicine with a holistic approach that recognizes the physical, emotional, and social factors that shape each patient’s experience. 

I am also committed to advocating for equitable healthcare and improving access and outcomes for marginalized and underserved communities.

My mission is to make my patients feel more at ease and provide excellent care throughout the perioperative process. 

After college I worked on an ambulance and quickly learned that I enjoyed caring for my patients in acute settings.  Similarly as an anesthesiologist, I like the immediate good I can do for people.  What I enjoy most though, is hopefully making people feel less anxious and more emotionally supported through stressful situations.

My mission is to provide culturally competent, evidence-based, and compassionate care to improve the quality of life of all of my patients. 

Medical care that not only tends to patients’ physiological ailments but imparts a sense of emotional comfort is the preeminent force in my practice. I completed my training at Tufts University School of Medicine, where I received a Masters Degree in Medical Science and another Masters Degree in Public Health.

I am a Magna Cum Laude graduate of Boston University, and I received my medical degree from Boston University School of Medicine. I completed his surgical and urological residencies at the Albert Einstein/Montefiore Medical Center in Bronx, NY. Upon my graduation, I joined South Shore Urology. I am certified by the American Board of Urology and I strive to provide the highest quality patient care in a compassionate environment.

Board Certification: Radiation Oncology

Residency: Harvard Radiation Oncology Program, Radiation Oncology

Medical School: University of Chicago Pritzker School of Medicine

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.