About CABT

The Center for Anxiety & Behavior Therapy offers empirically-supported treatment for anxiety disorders including obsessive-compulsive disorder (OCD), post-traumatic stress disorder (PTSD), social anxiety disorder, panic disorder, specific phobias, and generalized anxiety disorder. We also specialize in the dissemination of these treatments through workshops and expert consultation to other mental health professionals and agencies.


Steven D. Tsao, Ph.D.


Dr. Tsao is an expert in exposure and response prevention (EXRP) for obsessive compulsive disorder (OCD), having trained under several internationally-recognized leaders in the field including Dr. Edna Foa, Dr. Michael Jenike, and Dr. Dean McKay. Dr. Tsao has treated hundreds of clients with OCD, given regional and national presentations on OCD, and been featured on several popular media outlets including ABC’s 20/20, WBUR, WGBH, Prevention Magazine, and Health.com. Dr. Tsao also has extensive experience with prolonged exposure (PE) therapy for posttraumtaic stress disorder (PTSD) and is a certified therapist and supervisor by Dr. Edna Foa, the developer of PE. He has helped train PE therapists both nationally and internationally and provided expert consultation on PE for grants funded by the Department of Defense. Dr. Tsao received his Ph.D. in clinical psychology from Fordham University where he was the recipient of Senior Teaching Fellowship and the Alumni Dissertation Fellowship. Dr. Tsao completed his predoctoral internship at Boston University School of Medicine/Boston VA Medical Center and his postdoctoral fellowship at Harvard Medical School/McLean Hospital. He worked at a residential eating disorders program where he developed and implemented a specialized track for patients with OCD and later, focused exclusively on severe and treatment-resistant OCD and OC-spectrum disorders during his years at the OCD Institute at McLean Hospital. From 2012 to 2017, Dr. Tsao was a Staff Psychologist at the Center for the Treatment and Study of Anxiety at the University of Pennsylvania and most recently served as the Clinic Director. In addition to his role at CABT, Dr. Tsao currently serves as the Assistant Clinical Director at Rogers Behavioral Health-Philadelphia, where he oversees the delivery of evidence-based treatment for anxiety and mood disorders in an intensive day treatment setting.


David Yusko, Psy.D.


Dr. Yusko is nationally recognized as an expert in prolonged exposure (PE) therapy for posttraumatic stress disorder (PTSD) and is a certified PE therapist and supervisor by Dr. Edna Foa. Dr. Yusko is also an expert in anxiety disorders with particular expertise in obsessive compulsive disorder (OCD), panic disorder, social phobia, generalized anxiety disorder, and specific phobias. He is also certified as an exposure and response prevention (EXRP) therapist and supervisor for OCD by Dr. Edna Foa. He received his Psy.D. in clinical psychology from the Graduate School of Applied and Professional Psychology at Rutgers, The State University of New Jersey. As a graduate student, Dr. Yusko was supported by a National Institute on Alcohol Abuse and Alcoholism training grant under the expert mentorship of Dr. Barbara McCrady, a national leader in the field of alcohol use disorders. Dr. Yusko completed his predoctoral internship training at Montefiore Medical Center, a part of Albert Einstein School of Medicine. Upon completing his doctoral studies, Dr. Yusko joined The Center for the Treatment and Study of Anxiety (CTSA) in the Perelman School of Medicine at the University of Pennsylvania. Dr. Yusko joined CTSA in order to coordinate a National Institute on Alcohol Abuse and Alcoholism funded clinical trial examining the sequential versus concurrent treatment of PTSD and alcohol dependence. Dr. Yusko is one of a handful of experts in the world on the concurrent treatment of PTSD and substance use disorders. Dr. Yusko is also a treating clinician for the National Football League for players that violate the league’s substances of abuse rules. He was trained in sports psychology by Dr. Charlie Maher, sports psychologist for the Cleveland Indians baseball organization, and continues to work with athletes of all levels. Dr. Yusko has presented on issues associated with OCD and PTSD at local and national professional organizations, he has appeared on television and been interviewed by multiple media outlets.  


Christina DiChiara, Psy.D.

Senior Psychologist

Dr. DiChiara is a licensed clinical psychologist and Senior Psychologist at the Center for Anxiety & Behavior Therapy.  Dr. DiChiara received her bachelor’s degree from Villanova University. She received a master’s degree in Counseling and Clinical Health Psychology, as well as her master’s and doctoral degrees in Clinical Psychology, from the Philadelphia College of Osteopathic Medicine. In addition to providing services at CABT, Dr. DiChiara also practices at the VA Medical Center in Philadelphia, where she is a psychologist on the PTSD Clinical Team, the Military Sexual Trauma Coordinator, and a supervisor of evidenced-based therapies. Dr. DiChiara joined the Philadelphia VA in November 2014, after serving as a clinical faculty member at the Center for the Treatment and Study of Anxiety (CTSA) in the Perelman School of Medicine at the University of Pennsylvania. She completed her postdoctoral fellowship at the CTSA, under the mentorship of Dr. Edna Foa. Dr. DiChiara specializes in evidence-based therapy for PTSD, including Prolonged Exposure Therapy (PE) and Cognitive Processing Therapy (CPT). She is a certified PE supervisor. Dr. DiChiara also specializes in cognitive-behavioral treatment for anxiety disorders, including Exposure and Response Prevention (EX/RP) for OCD, as well as evidence-based treatment for social anxiety, panic disorder, specific phobias, generalized anxiety, and depression.


940 Haverford Road
Suite 301
Bryn Mawr, PA 19010

(610) 455-5757