Meet the Team

Dr. Elliot B. Martin, Jr., Director of Medical Psychiatry
Elliott B. Martin, Jr. is the Director of Medical Psychiatry at Newton-Wellesley Hospital, and is the Interim Medical Director for the Substance Use Services. He is also an Assistant Clinical Professor of Psychiatry at Tufts University School of Medicine. He is triple board certified, in General Psychiatry, Child and Adolescent Psychiatry, and Addiction Medicine. He completed his residency at Yale, and his fellowship at Boston Children’s Hospital. He has been at Newton-Wellesley since 2012. Dr. Martin has published over 50 articles in academic and popular journals, including research on clinician emotions during crises, philosophical and moral issues in medicine, the history of medicine and psychiatry, translations of ancient medical texts, and critical commentaries on current issues in psychiatry and medicine. He is a regular contributor to the Psychiatric Times and Op-Med. He is the author of Reconceptualizing Mental Illness in the Digital Age (Cambridge Scholars Press 2021).

Dr. Antje Barreveld, Director of Education and Outreach
Antje Barreveld, MD is Director of the Newton-Wellesley Hospital Substance Use Services. She graduated from the University of California San Francisco Medical School and completed her residency in Anesthesiology and fellowship in Pain Medicine at Brigham and Women's Hospital in Boston. She is board certified in Anesthesiology and Pain Medicine and is Assistant Professor of Anesthesiology at Tufts University School of Medicine. Dr. Barreveld is also Medical Director of the Newton-Wellesley Hospital Pain Management Services and Anesthesiologist with Commonwealth Anesthesia Associates in Newton, MA. Dr. Barreveld is Research Scientist and Research Associate at Harvard Medical School in the Department of Anesthesiology, Perioperative and Pain Medicine at Brigham and Women's Hospital in Boston, MA and teaches pain and addiction courses at Harvard Medical School and Tufts University Medical School. She is Co-Principal Investigator of the Harvard School of Dental Medicine and Brigham and Women's Hospital Center of Excellence in Pain Education (CoEPE), designated by the National Institutes of Health Pain Consortium. Dr. Barreveld is Co-Editor of the Pain Education Section in Pain Medicine, the official journal of the American Academy of Pain Medicine. Her clinical and research interests are in safe practices in co-managing pain and addiction, addiction prevention in the community, pain management education, and multimodal pain management strategies.

Dr. Catharina Armstrong, Associate Director
Catharina Armstrong, MD MPH is Associate Director of the Newton-Wellesley Hospital Substance Use Services. Dr. Armstrong graduated from University College Dublin School of Medicine. She completed Internal Medicine residency training at Massachusetts General Hospital and a fellowship in Infectious Diseases at Beth Israel Deaconess Medical Center. Dr. Armstrong was awarded a Master’s in Public Health from Harvard Medical School in 2014. She is board certified in Internal Medicine, Infectious Diseases and Addiction Medicine and is an Assistant Professor at Tufts University School of Medicine. Dr. Armstrong was previously the Chief of Infectious Diseases and director of the Boston Medical Center and Shattuck site Addiction Fellowship program at the Lemuel Shattuck Hospital in Boston. Her clinical and research interests are in prevention and management strategies to support those struggling with addiction and the intersect of infectious diseases and substance use disorders. Dr. Armstrong is an Addiction Medicine and Infectious diseases/HIV consultant at Framingham Women’s prison. She serves on the Continuing Medical Education (CME) Committee for the Addiction Society of Addiction Medicine (ASAM) and on the Board of Directors for the Boston Bulldogs Running Club, a non-profit running club established to provide a safe community of support for all those adversely affected by addiction.

Angela Zaydon, LICSW
Angela Zaydon, LICSW is the clinical social worker at Newton-Wellesley Hospital Substance Use Services. She graduated from Northeastern University with a Bachelor’s of Science in Psychology and Simmons College with a Masters in Social Work. Angela has worked in the field of addiction treatment since 2010; she has held several positions at both McLean Hospital and Lemuel Shattuck Hospital. She has extensive skills in substance use disorder management and treatment, knowledge of medical management therapy for opioid and alcohol use disorder, harm reduction and crisis intervention. She also has experience in clinical supervision of licensed social workers and graduate-level student workers. She enjoys working with individuals and families by creating a safe and supportive space as they navigate the challenges of addiction. Her hope is to guide people along their journey to recovery and equip them with the tools to make sustainable change.

Hallie Delorey, Recovery Coach
Hallie joined the Newton-Wellesley Hospital Substance Use Services in December 2019. She is a certified recovery coach, certified drug and alcohol counselor as well as a certified interventionist. She currently sees patients individually in the SUS clinic, runs a recovery group, as well as completes consults for the Newton-Wellesley emergency department and inpatient units. Hallie has over 30 years of recovery and has worked in the field of substance use disorder treatment in various capacities, including holding positions at Mclean Hospital, Gosnold Treatment Center and a therapeutic boarding school. She has conducted interventions all over the world. Her experience as a person in long-term recovery brings a unique type of support and understanding for those seeking help with their addiction.