Jeffrey J. Weiss, PhD, MS, is an Associate Professor of Medicine at the Icahn School of Medicine at Mount Sinai.

He is the Director of the Respectful & Equitable Access to Comprehensive Healthcare (REACH) Program in the Division of General Internal Medicine. REACH is a community outreach and primary care-based harm reduction program providing stigma-free primary care, including HCV treatment, to persons who use drugs. The focus of his research has been on the intersection of psychiatric and substance use disorders with the prevention and treatment of infectious diseases. He has worked for over 30 years in the United States and Europe as a licensed clinical psychologist developing innovative models of integrating behavioral health care into the medical care of persons with infectious diseases, psychiatric, and substance use disorders; conducting research on behavioral interventions to improve their quality and length of life including strategies to improve medication and treatment adherence; and providing education and mentorship to medical providers and public health professionals.

His NIH-funded research studies led to the development of the open-access, web-based Psychosocial Readiness Evaluation and Preparation for hepatitis C treatment (PREP-C) assessment tool which has been accessed by over 2000 health care professionals from around the world and shown to improve rates of HCV treatment initiation in studies in urban and rural settings. His current research focuses on the intersection of HIV, HCV, and the opioid crisis. He is the Associate Director of the Hepatitis C and Drug User Health Center of Excellence of the New York State Department of Health AIDS Institute’s Clinical Education Initiative and is a member of the New York State Hepatitis C Elimination Task Force.