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.

I chose to become a primary care physician because I cherish the long-term relationships I establish with my patients. I enjoy taking care of patients of all ages and families at all stages of their lives. I believe listening is as important as speaking. I see my role as an educator, sharing my knowledge and helping patients translate that into healthy habits for the prevention and management of chronic illness. 

Outside of work, I enjoy traveling near and far with my husband and three children.

Establishing a good patient-physician relationship is crucial to help provide the best care. I believe in allowing ample time in a visit to listen to my patients' needs and thoroughly explain their diagnosis and treatment plan. Most podiatric issues can be treated with aggressive conservative therapy, although when surgical intervention is necessary, I will communicate that to the patient in a direct and concise manner. 

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.