Dr. Lewin is a tenured Professor of Pediatrics and Psychiatry and Division Chief of Pediatric Neuropsychiatry. He is the Maurice A. and Thelma P. Rothman Endowed Chair in Developmental Pediatrics. He is the program director for the USF Rothman Center and the OCD, Anxiety and Related Disorders Program. His primary appointment is with the Department of Pediatrics at the University of South Florida with a joint appointment in psychiatry and behavioral neurosciences. He holds courtesy appointments as a Professor in Psychology at USF Tampa and USF St. Petersburg. Dr. Lewin is the director of the Tourette Association of America Center of Excellence.

Dr. Lewin is board certified in child and adolescent psychology by the American Board of Professional Psychology. Dr. Lewin specializes in OCD, anxiety, misophonia, Tourette/tic, trichotillomania and developmental disorders. Dr. Lewin evaluates both pediatric and select adult patients for assessment/evaluation for cognitive-behavioral treatment of OCD, anxiety and habit reversal therapy for tic spectrum disorders, skin picking, and hair pulling/trichotillomania. Dr. Lewin has previously worked with youth with poor adherence and anxiety related to type 1 diabetes and has volunteered with the Florida Diabetes Camp since 1992.

Dr. Lewin joined the USF Faculty in 2009. He received his Ph.D. in clinical and health psychology from the University of Florida in 2007. Subsequently, Dr. Lewin completed his clinical residency and a postdoctoral National Institutes of Mental Health (NIMH) research fellowship (in child psychology and behavioral neuroscience) at the Semel Institute for Neuropsychiatry and Human Behavior at the University of California, Los Angeles (UCLA). Dr. Lewin's research activities focus on obsessive-compulsive spectrum (including Tourette syndrome/tic disorders, misophonia) and anxiety disorders. Dr. Lewin has received research funding from the Centers for Disease Control and Prevention (CDC), the Tourette Syndrome Association, the Ream Foundation, NARSAD (now the Brain and Behavior Research Foundation), Joseph Drown Foundation and Friends of the Semel Institute, International OCD Foundation (IOCDF) and the University of South Florida Research Foundation. He was a 2012-13 NIMH Child Intervention, Prevention and Services (CHIPS) fellow and was the 2007-2008 Friends of the Semel Institute fellow. Dr. Lewin has over 200 peer-reviewed publications and is on the editorial board for four scientific journals. He is an associate editor for Child Psychiatry and Human Development, the Journal of Obsessive Compulsive and Related Disorders and the Journal of Child and Family Studies. Dr. Lewin’s former trainees hold faculty and leadership positions across the country including at All Children’s Hospital and USF. He is a trainer for health professionals in advanced psychotherapy techniques for both OCD and Tourette/Tics via Behavioral Training Institutes (BTIs) at the International OCD Foundation and the Tourette Association of America.

Dr. Lewin is the 2023 President of the American Board of Clinical Child and Adolescent Psychology. He is a Fellow of the American Psychological Association. He served as the elected member-at-large for Education and Standards for the Society of Clinical Child and Adolescent Psychology – American Psychological Association Division 53. He serves on the American Psychological Association (APA) Commission on Accreditation (CoA) and on the Taskforce for Training Guideline Development of Clinical Child and Pediatric Psychology. 

Dr. Horng is a clinical associate professor with the University of South Florida and licensed clinical psychologist. She specializes in the use of cognitive-behavioral therapy to treat obsessive-compulsive disorder, as well as other primary anxiety disorders such as social phobia, panic disorder, and generalized anxiety disorder. She earned her Ph.D. in clinical Psychology from Binghamton University (a State University of New York). Dr. Horng completed her internship at the Geisinger Medical Center in Danville, Pennsylvania, followed by a two-year, post-doctoral fellowship at the St. Louis Behavioral Medicine Institute in which she acquired specialized training in the treatment of anxiety disorders in an intensive outpatient setting. She joined the USF Faculty in 2009.

Dr. Rahman is a clinical associate professor specializing in habit reversal training for trichotillomania (hair pulling) as well as cognitive behavioral therapy to treat obsessive-compulsive disorder. He joined the USF Faculty in 2011 after completing his fellowship training at the USF Rothman Center. He received his Ph.D. in clinical psychology from Purdue University and Rahman completed his internship at the University of Florida. Dr. Rahman also has worked extensively with children with OCD, tics, hair pulling, disruptive behavior disorders and anxiety disorders.

Dr. Murphy is a Professor Emertius of pediatrics at USF Health and former Maurice A. and Thelma P. Rothman Endowed Chair in Developmental Pediatrics with a joint appointment in the University of South Florida Department of Psychiatry since 2008.

After graduating from the College of Medicine at the University of Florida, Dr. Murphy stayed at UF to complete her residency in general psychiatry and fellowship in child and adolescent psychiatry. As a member of the Department of Psychiatry faculty, she served as director of the UF Child & Adolescent Psychiatry Outpatient Program, director of the UF Child Anxiety & Tic Disorder Clinic, and medical director for the UF Autism Unit. From 2005-2008 she was chief of the Division of Child and Adolescent Psychiatry at UF.

Dr. Murphy is board-certified in psychiatry and child psychiatry. She also holds a Master of Science in clinical investigation. She has received several major grants from the National Institute of Mental Health and has more than 275 publications. Her current research focuses on understanding the role of infections and the immune system in the onset of childhood psychiatric disorders and pharmacological and psychological treatments for Tourette's syndrome and obsessive-compulsive disorder.

Dr. Murphy is a member of the National Tourette Syndrome Association Medical Advisory Board and the International Obsessive Compulsive Foundation Scientific Advisory Board. She is a member of numerous professional organizations including the American Academy of Child & Adolescent Psychiatry, the Movement Disorders Society, the American College of Psychiatrists, the American Neuropsychiatric Association and Biological Psychiatry. She has been named as a top doctor in pediatric psychiatry by U.S. News & World Report.

Retired from clinical responsibilities, Dr. Murphy continues to consult on educational, mentoring and scholarly activities at the USF Rothman Center.

Dr. Hudson is an assistant professor of Pediatrics at USF Health and a Child and Adolescent Psychiatrist. He is the medical director at the Rothman Center and is focused on evidence-based treatment of neuropsychiatric disorders including obsessive-compulsive, tic, Tourette’s and related disorders, while also advancing the evidence base through clinical research trials.