Dr. Roger D. Weiss, M.D. has focused his career on treatment and research with substance dependent patients; he is Professor of Psychiatry at Harvard Medical School and Chief of the Division of Alcohol and Drug Abuse at McLean Hospital in Belmont, Massachusetts. Through his research, international teaching, clinical work, and writings, Dr. Weiss has made significant contributions to the field of substance use disorders, with a particular focus on those individuals with co-occurring psychiatric illness. He has been Principal Investigator on numerous National Institute on Drug Abuse or National Institute on Alcohol Abuse and Alcoholism grants, and has developed Integrated Group Therapy, an evidence-based treatment for patients with co-occurring bipolar disorder and substance use disorders. Dr. Weiss recently led a multi-site national study of the treatment of prescription opiate dependence, as part of the National Institute on Drug Abuse Clinical Trials Network. He has authored over 300 articles and book chapters, and has participated in a number of prominent national committees, including serving as Vice Chair of the American Psychiatric Association Task Force on Practice Guidelines for Patients with Substance Use Disorders. In 2007, The Centre for Addiction and Mental Health in Toronto selected Dr. Weiss to receive the H. David Archibald Award for Outstanding Research and/or Practice in the Addictions.

Dr. Roger D. Weiss's research interests include: Alcohol and Drug abuse, dual diagnosis.