Program Directors

Alyssa Peterkin, MD is an Assistant Professor of Medicine. She is an alumna and Director of the Grayken Fellowship in Addiction Medicine at Boston Medical Center. Her clinical roles include working as a hospitalist, rounding on the inpatient addiction consult service with fellows and working in Faster Paths, Boston Medical Center’s low barrier substance use disorder clinic.

Sarah Bagley, MD is an Associate Professor of Medicine and Pediatrics at Boston University School of Medicine and is board certified in Pediatrics, Internal Medicine, and Addiction Medicine. She is the founder of the CATALYST at Boston Medical Center providing integrated substance use care and primary care for youth where she sees patients. Her passion is to ensure that all youth who use substances have access to high quality, equitable care to promote their health. Her research focus is on the engagement of young adults who use drugs and their families in care to minimize risk for overdose and the complications of drug use. She has funding from the National Institute on Drug Abuse, the Centers for Disease Control and Prevention, and PCORI to conduct research about engagement in treatment and overdose prevention of young adults after nonfatal opioid overdose and reducing stimulant related overdose.

Jessie Gaeta, MD has practiced Internal Medicine at Boston Health Care for the Homeless Program since 2002 and served as Chief Medical Officer from 2015-2022. Dr. Gaeta has dedicated herself to advocacy for and with people living with substance use disorders, particularly when they are disconnected from traditional pathways to care. She is always learning more from people with lived experience about homelessness, opioid use disorder, and harm reduction. Over the past two decades, she has spearheaded numerous innovative initiatives to rethink how we approach care for individuals with substance use disorder and complex health conditions, particularly when these conditions are exacerbated by severe poverty and social stigma.