Dr. O'Connor is the Dan Adams and Amanda Adams Professor and Chief of General Internal Medicine at Yale University School of Medicine and Yale-New Haven Hospital in New Haven, Connecticut. Dr. O'Connor's research and scholarly work have focused on the interface between primary care and substance abuse. He has written well over 200 papers on these topics that have been published in leading medical journals including The New England Journal of Medicine and JAMA. Dr. O'Connor's work in the area of opiate detoxification led to research examining the efficacy of opioid maintenance therapy for treating opioid use disorder in primary care and other general medical settings. He and his colleagues at Yale completed a series of studies that look at the effectiveness of methadone and of buprenorphine as the pharmacological agent for this treatment in primary care and emergency medicine settings. Among his accomplishments as Chief of General Internal Medicine at Yale is the recruitment of several academic "generalist" faculty to join efforts to perform research on a broad range of topics related to addiction medicine. The overall goal of this research is to improve access to treatment for patients with substance use disorders to high quality care for their substance use disorders in the context of their general medical care. Dr. O'Connor is also Past President of both the American Board of Addiction Medicine and AMERSA.