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Substance Use Disorders Division

Alcohol and Drug Abuse Partial Hospital Program

Program Leadership

Ruth Reibstein, EdDRuth Reibstein, EdD, Program Director

Dr. Reibstein is an instructor in psychology in the Department of Psychiatry at Harvard Medical School and has been a licensed psychologist for 25 years. Her clinical interests include integrated treatment for addiction, mood and anxiety disorders, women’s recovery issues, and mindfulness group therapy skills.

Olivera J. Bogunovic, MD


Olivera J. Bogunovic, MD, Medical Director

Dr. Bogunovic is also the medical director of Ambulatory Services for the Division of Alcohol and Drug Abuse. Her primary areas of clinical innovation are in developing effective treatments for benzodiazepine use disorders and developing novel treatments for elderly patients with substance use disorders. In addition to clinical and administrative roles, Dr. Bogunovic also teaches medical students and residents and addiction and geriatric fellows.

Hilary S. Connery, MD, PhD


Hilary S. Connery, MD, PhD, Clinical Director, Substance Use Disorders Division

Dr. Connery’s expertise includes the treatment of opioid use disorders and co-occurring psychiatric and substance use disorders. She was a contributor to the APA Practice Guidelines for the treatment of substance abuse and is an investigator in the New England Consortium of the NIDA Clinical Trials Network. Dr. Connery is also the addiction psychiatry rotation director for the MGH/McLean Adult Psychiatry Residency Training Program.

Roger D. Weiss, MDRoger D. Weiss, MD, Senior Consultant

Currently chief of the Substance Use Disorders Division, Dr. Weiss’ career has focused on treatment and clinical research with substance-dependent patients. He has authored over 300 publications, including several books, and is the recipient of numerous National Institutes of Health grants for developing integrated group therapy, as well as leading a multisite treatment study of prescription opioid dependence.

Shelly F. Greenfield, MD, MPHShelly F. Greenfield, MD, MPH, Senior Consultant

Dr. Greenfield is an addiction psychiatrist, clinician and researcher. Her research focuses on treatment, gender differences, and health services as relates to substance use. She is a recipient of National Institute on Drug Abuse (NIDA) funding for mentoring in substance use disorder patient-oriented research as well as for developing and testing a new manual-based group therapy for women with substance use disorders.

Nancy Merrill, PMHCNS, BC


Nancy Merrill, PMHCNS, BC, Senior Consultant

A board certified advanced practice psychiatric nurse for more than 30 years, Ms. Merrill has been working in McLean’s Substance Use Disorders Division for the past 20 years. During her time at McLean she has been involved in several national research projects including the COMBINE study, the Topamax medication study and the integrated group therapy study. She is currently the program director of the Alcohol and Drug Abuse Inpatient Program.

Staff and Associates

Our multidisciplinary clinical staff have extensive background in the treatment of substance use disorders and co-occurring mental health conditions. Our team of clinicians and support staff includes board-certified addiction psychiatrists, licensed psychologists and family therapists, registered nurses, and mental health specialists.

Working in close partnership with patients and families, we create and provide high-quality care tailored to each individual’s needs. Staff have experience working with patients from diverse cultural and socioeconomic backgrounds from across the country and around the world.

The Substance Use Disorders Division is led by Roger D. Weiss, MD.