David J. Hellerstein, M.D., is a research psychiatrist at the New York State Psychiatric Institute, New York, NY, and Professor of Clinical Psychiatry at the Columbia University Irving Medical Center. He specializes in research and treatment of mood and anxiety disorders, particularly the medication treatment of chronic depression. His current studies include psilocybin in treatment-resistant depression, ganaloxone for postpartum depression, and lumateperone for bipolar depression.

Dr. Hellerstein is Director of the Depression Evaluation Service, which conducts studies on the medication and psychotherapy treatment of conditions including major depression, chronic depression, and bipolar disord