Dr. Henry is a general internist and primary care physician who does clinical and health services research in two main areas. First, he does research analyzing patient-clinician communication developing interventions that improve patient outcomes and quality of care through improving patient-clinician communication. Most of his research projects in this area have focused on communication about opioids and chronic pain. Second, he does research on opioid epidemiology and policy. He has led several research projects analyzing California’s prescription drug monitoring program data and evaluating opioid overdose prevention efforts in California. Other research interests include methods for analyzing patent-clinician interaction, pain management in primary care, treatment of opioid use disorder, and medical epistemology.