The therapists at the Manhattan Center for Cognitive-Behavioral Therapy include psychologists, postdoctoral fellows, and clinical externs. Each of them has different areas of expertise and training backgrounds. Learn more about our CBT therapists by clicking on any of the links below.
- Austin Harrison, Ph.D., Postdoctoral Fellow
- Nicole Wildstein, Psy.D., Postdoctoral Fellow
- Anna Womack, Ph.D., Psychologist
- Kristen Piering, Psy.D., Psychologist
- Jenny Choi, Ph.D., Psychologist
- Amoha Bajaj-Mahajan, Ph.D., Psychologist
- Michelle Pavony, Ph.D., Psychologist
- Justin Arocho, Ph.D., Assistant Director
- Rachel Chang, Psy.D., Psychologist
- David Yap, M.A., Extern
- Danielle Kahn, Extern
- Julie Randolph, Extern
- Paul B. Greene, Ph.D., Director
Austin Harrison, Ph.D.
Postdoctoral Fellow
Dr. Harrison specializes in cognitive-behavioral therapy (CBT) for adults with mood and anxiety disorders — namely, depression, generalized anxiety, panic disorder and agoraphobia, social anxiety, health anxiety, and obsessive-compulsive disorder. He also has a particular interest in working with individuals pursuing creative endeavors who struggle with procrastination, productivity blocks, fear, and self-doubt. Dr. Harrison has training in a broad range of evidence-based interventions, including behavioral activation, exposure and response prevention (ERP), Acceptance and Commitment Therapy (ACT), Dialectical Behavioral Therapy (DBT), CBT for insomnia, and mindfulness-based approaches.
Dr. Harrison received his B.A. from The College of New Jersey in Clinical Psychology and Philosophy, and his Ph.D. in Clinical Psychology from Fordham University, where he conducted research on misophonia and collaborative care interventions for PTSD. He completed his predoctoral internship at Northwestern University Feinberg School of Medicine in outpatient and intensive outpatient clinics focused on individual and group-based treatment of mood, anxiety, personality, and trauma-related disorders. Prior to graduate school, Dr. Harrison gained extensive research experience in labs at Columbia University and Duke University Medical Centers investigating psychiatric and neuroscience applications of brain stimulation technology (e.g. transcranial magnetic stimulation) and neuroimaging.
Nicole Wildstein, Psy.D.
Postdoctoral Fellow
Dr. Wildstein values using cognitive behavioral therapy (CBT), exposure response prevention therapy (ERP), and dialectical behavior therapy (DBT) to teach patients specific, life-long skills that can improve their ability to cope with challenging emotions and resist unhelpful behaviors. She has extensive experience treating panic attacks, agoraphobia, social anxiety, obsessive-compulsive disorder (OCD), generalized anxiety, depression, trauma, ADHD, body-focused repetitive behaviors (hair-pulling and skin-picking), disordered eating, and insomnia. She specializes in helping college students and young adults, and has broad experience with individuals across the lifespan. Her patients often note her authentic style, insight, and helpful sense of humor.
Dr. Wildstein received her Psy.D. and M.A. from Ferkauf Graduate School of Psychology (Yeshiva University) and her B.A. in Philosophy-Neuroscience-
Anna Womack, Ph.D.
Psychologist
Dr. Womack specializes in the treatment of insomnia, anxiety disorders and related concerns (e.g., intrusive worry, generalized anxiety, social anxiety, OCD, panic attacks), and chronic pain. She also enjoys working with individuals as they navigate life transitions and is highly skilled in career counseling. She utilizes cognitive-behavioral and mindfulness-based approaches, emphasizing evidenced-based interventions such as mindfulness-based stress reduction (MBSR), and Acceptance and Commitment Therapy (ACT). Her approach to therapy is highly collaborative. Dr. Womack has extensive experience working with LGBT individuals, women, and early career professionals.
Dr. Womack completed her Ph.D. in the APA-accredited Counseling Psychology program at the University of Southern Mississippi. She completed postdoctoral training at the Gulf Coast Veterans Health Care System, where she received training in cognitive behavioral therapy for insomnia (CBT-I). She also works at Columbia University in the Office of Postdoctoral Affairs. There she provides guidance on career planning and professional development to postdoctoral researchers.
Readings authored by Dr. Womack
Kristen Piering, Psy.D.
Psychologist
August 2023: Dr. Piering is not currently accepting new patients.
Dr. Piering works with children, teens, and adults with a wide range of emotional difficulties, including OCD, insomnia, anxiety, panic, emotion regulation, and depression. She completed her pre-doctoral internship at The School at Columbia University. She has provided therapy to adults at the McShane Center for Psychological Services and worked with children, teens, and young adults on psychiatric inpatient units at Kings County Hospital, as well as in school settings.
Dr. Piering received her B.S. in Psychology from Fordham University, her M.S.Ed. from Pace University, and her Psy.D. in Clinical Child and School Psychology from Pace University. She has conducted research examining the role of familial support and creativity on the identity development of young adults with cancer. Her other research has focused on the role of creativity and parenting in both academic achievement and delinquency. Dr. Piering has taught undergraduate and graduate courses on family psychology and assessment and has led workshops on social emotional learning and development, as well as on executive functioning skills and strategies.
Dr. Piering is also the Lower School Psychologist at The Chapin School where she works with students in Kindergarten through third grade, as well as their families, individually and in groups. She also teaches skill-based social emotional lessons, provides consultation to teachers and families, leads workshops, and collaborates with teachers and other educators.
Readings authored by Dr. Piering
Jenny Choi, Ph.D.
Psychologist
August 2023: Dr. Choi is not currently accepting new patients.
Dr. Choi specializes in the treatment of anxiety disorders (including generalized anxiety disorder, social anxiety, phobias, and panic attacks), depression, obsessive-compulsive disorder (OCD), posttraumatic stress disorder (PTSD) and trauma-related issues, and body-focused repetitive behaviors (including trichotillomania and skin picking). She also has expertise working with individuals who struggle with self-esteem, fear of failure, perfectionism, and procrastination. She works with teens and adults using a warm, collaborative approach. She provides culturally sensitive treatment. Dr. Choi has extensive experience providing integrative evidence-based interventions, including Exposure and Response Prevention (ERP), Acceptance and Commitment Therapy (ACT), Cognitive Processing Therapy (CPT), Dialectical Behavior Therapy (DBT), Habit Reversal Training (HRT), CBT for Insomnia (CBT-I), Motivational Interviewing (MI), and mindfulness-based approaches.
Dr. Choi received her B.A. in Psychology from Pennsylvania State University, and her M.S.Ed. and Ph.D. in Counseling Psychology from Fordham University. Her research has focused on the experience of acceptance and identity development of Korean American LGB adults. She completed her predoctoral internship in an APA-accredited program at the Baruch College Counseling Center. She has also provided treatment to adults and adolescents in psychiatric inpatient, medical, outpatient, and community mental health settings. Dr. Choi is fluent in Korean.
Amoha Bajaj-Mahajan, Ph.D. (“Dr. Bajaj”)
Psychologist
Dr. Bajaj is an expert in the area of stress and health in adults, especially as it relates to depression, anxiety, and adjustment to medical illness. She specializes in the treatment and management of insomnia, depression, anxiety, OCD, chronic pain, smoking cessation, women’s health and intimacy, and adjustment to medical illnesses. In addition to these areas, Dr. Bajaj has experience helping those who struggle with perfectionism, rumination or negative thinking, low self-esteem, and other emotional difficulties. Dr. Bajaj has training and experience with Interpersonal Therapy (IPT), Acceptance and Commitment Therapy (ACT), Motivational Interviewing (MI), and mindfulness-based interventions. Her clients have commented on her warm, genuine, and collaborative approach as she tailors treatment to each individual’s needs.
Dr. Bajaj received her B.A. from Rutgers University. She received her M.S. and Ph.D. from the University of Pittsburgh in Clinical and Biological Health Psychology. She completed her pre-doctoral residency in Behavioral Medicine at Yale University’s School of Medicine. She has published in high-impact, peer-reviewed medical journals in the areas of social relationships, stress management, and health outcomes. Her research has been recognized and supported by academic and medical institutions including Rutgers University, the University of Pittsburgh, and Yale University’s School of Medicine. Dr. Bajaj has taught undergraduate and graduate courses in the areas of biological psychology and stress and health.
Readings authored by Dr. Bajaj-Mahajan
Justin Arocho, Ph.D.
Assistant Director
Dr. Arocho specializes in the cognitive-behavioral treatment of anxiety disorders (including panic attacks/disorder, agoraphobia, generalized anxiety disorder/worry, phobias, and social anxiety disorder), obsessive-compulsive disorder (OCD), depression, insomnia, illness/health anxiety and body-focused repetitive behaviors (including trichotillomania and skin picking). He also has expertise working with individuals with a history of vasovagal syncope. His approach to therapy is encouraging and collaborative, and he employs evidence-based treatments including Exposure and Response Prevention (ERP), CBT for Insomnia (CBT-I), and Habit Reversal Training (HRT), among others. He is fluent in Spanish and is highly experienced in working with LGBTQ and ethnic minority individuals.
Dr. Arocho received his B.A. in Psychology and Anthropology from The College of William and Mary, and his Ph.D. in Clinical Psychology at Fordham University, where he conducted research on the role of moral disgust in OCD and PTSD. He completed his predoctoral internship at Rutgers University Behavioral Health Care, where he trained in outpatient, partial hospital, and HIV-clinic mental health services, as well as psychological assessment. He has also worked in inpatient hospital, university counseling, forensic, and community mental health settings.
Dr. Arocho serves as an adjunct faculty contributor to the Predoctoral Psychology Internship Program at Rutgers University Behavioral Health Care in Newark, New Jersey. In this capacity, he interviews prospective interns, leads training for interns on diversity issues, and serves as an expert evaluator for intern case competency exams.
Readings authored by Dr. Arocho
Michelle Pavony, Ph.D.
Psychologist
August 2023: Dr. Pavony is not currently accepting new patients. 
Dr. Pavony specializes in cognitive-behavioral therapy for the treatment of depression, OCD and other anxiety disorders, and is certified in Cognitive Processing Therapy for PTSD. She utilizes Dialectical Behavior Therapy (DBT) skills to address eating disorders, social phobias, and interpersonal conflicts. She takes an individually-tailored and collaborative approach in her work with adolescents, adults, and couples, and has further clinical interests in life transitions and identity struggles.
Dr. Pavony completed her B.A., M.S., and Ph.D. at Binghamton University, where she conducted and published research on pain perception and borderline personality disorder. Her pre-doctoral internship included training in the VA Connecticut Healthcare System and The UConn Health Center’s School of Medicine. She then completed a two-year post-doctoral fellowship at New York-Presbyterian Hospital — Weill Cornell Medical Center, where she received training in Transference Focused Psychotherapy (TFP). TFP is an empirically-supported treatment for personality disorders. She also has experience in correctional health, having served as Clinical Supervisor and Associate Director of Mental Health in a specialty forensic program.
Rachel Chang, Psy.D.
Psychologist
Dr. Chang specializes in treating adults experiencing depression, insomnia, as well as anxiety problems including social anxiety, obsessive-compulsive disorder, intrusive thoughts, health anxiety, procrastination, posttraumatic stress disorder (PTSD). She also treats trichotillomania, skin picking, emotion regulation difficulties, relationship problems, and eating disorders. Dr. Chang has extensive experience in providing evidence-based CBT treatments such as Interpersonal Therapy (IPT) and Prolonged Exposure (PE) for PTSD. She regularly integrates Dialectical Behavioral Therapy (DBT) and mindfulness-based interventions into her work. Her clients note her warm and genuine manner and her emphasis on their individual goals, values, and needs.
Dr. Chang received her B.S. from Virginia Tech, her M.A. from Teachers College, Columbia University, and her Psy.D from La Salle University. She completed her pre-doctoral internship at Trinitas Regional Medical Center. She also received comprehensive training in providing DBT with adults, teens, and families. She has trained in community mental health and school settings. Dr. Chang is fluent in Mandarin and has a research interest in cultural influences on mental health-seeking attitudes amongst minority populations.
Readings authored by Dr. Chang
David Yap, M.A.
Extern
Mr. Yap is a doctoral candidate in the Health Psychology and Clinical Science program at City University of New York. He works with individuals with anxiety and mood disorders and has extensive experience treating OCD with exposure and response prevention. Prior to MCCBT, Mr. Yap trained for a year at Weill Cornell Medicine Department of Neurological Surgery where he provided cognitive remediation for patients who struggled with attention, memory, and executive functioning. He has also completed clinical training at the New York Psychiatric Institute.
Mr. Yap has published research on attentional and cognitive biases, and currently investigates mechanisms of psychopathology that are common across disorders. Through his research, he hopes to develop more effective treatments that target multiple disorders at the same time. He holds a BA in anthropology from McGill University, and a MA in psychology from Hunter College, CUNY.
Danielle Kahn
Extern
Ms. Kahn is a doctoral student in Clinical Psychology at the Ferkauf Graduate School (Yeshiva University). She works with people who have difficulty managing and regulating intense emotions, and also treats depression, anxiety, OCD, body-focused repetitive behaviors, and other problems. She also treats people with eating and weight disorders, body image disturbances, and disordered eating.
Prior to joining MCCBT, Ms. Kahn completed clinical training at New York-Presbyterian Westchester Behavioral Health Center on the inpatient Eating Disorder Unit where she provided both individual and group therapy to adolescents and adults with complex and diverse eating disorders. There, she practiced cognitive behavioral therapy, dialectical behavioral therapy, acceptance and commitment therapy, mindfulness-based interventions, and motivational interviewing. Previously, Ms. Kahn was a Clinical Research Coordinator at the Eating and Weight Disorders Program at Massachusetts General Hospital, Harvard Medical School. There, she supported studies that investigated homeostatic and hedonic food motivation pathways that underlie eating disorder trajectories.
Ms. Kahn holds a B.A. in Psychology and Brain Sciences and Educational Studies from Washington University in St. Louis. Her current research focuses on mindfulness-based interventions for eating disorders.
Julie Randolph
Extern
Ms. Randolph is a doctoral student at the Ferkauf Graduate School of Psychology (Yeshiva University). She works with individuals suffering from anxiety, mood disorders, addiction, OCD, and chronic stress. Prior to MCCBT, Ms. Randolph completed training at New York-Presbyterian (NYP) Hospital on both the Addiction Recovery and General Psychiatry units where she provided both individual and group therapy, as well as administered psychological assessments. At NYP, she received extensive training in cognitive behavioral therapy, dialectical behavioral therapy and motivational interviewing. Before graduate school, Ms. Randolph worked for two years as a Clinical Research Coordinator at the Children’s Hospital of Philadelphia, implementing social emotional learning programs to reduce aggression within the School District of Philadelphia.
Ms. Randolph holds a B.A. in Psychology from Bowdoin College. Her research at Ferkauf focuses on intergenerational trauma and resiliency factors, with the goal to advance psychological interventions for individuals and families who have experienced trauma.
Paul B. Greene, Ph.D.
Director
Dr. Greene is an expert in the treatment of posttraumatic stress disorder (PTSD), OCD, depression, overeating, panic attacks, health anxiety, and the applications of mindfulness and meditation in the treatment of anxiety. He specializes in helping survivors of rape, assault, and accidents who develop posttraumatic anxiety. He has training in the use of exposure and response prevention, cognitive processing therapy (CPT), prolonged exposure therapy, and cognitive-behavioral therapy for insomnia. He is also certified in dialectical behavior therapy (DBT).
He received his doctorate in clinical psychology from Boston University and completed postdoctoral training at Memorial Sloan-Kettering Cancer Center and the Mount Sinai School of Medicine. Dr. Greene served as an assistant professor at the Mount Sinai School of Medicine for six years. At Mount Sinai, he conducted research and supervised medical residents. He served as principal investigator of an NIH-funded research project that trained over 300 social workers, psychologists, psychiatrists, and other clinicians in cognitive-behavioral therapy.
Dr. Greene has been invited to speak about his research in the United States, Europe, and Asia. He is a certified meditation instructor and a teacher of Mindfulness-Based Stress Reduction (MBSR). Dr. Greene has been quoted and his work described in popular media, including Cosmopolitan, Salon, WABC-TV, the New York Times Magazine, and Forbes. Follow him on Twitter at @anxietyocd.
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Readings authored by Dr. Greene
