Kathleen M. Rupertus, PsyD

Clinical Director

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Dr. Kathy Rupertus is a licensed clinical psychologist and estabished The Anxiety and OCD Treatment Center, LLC in 2005. She received her doctorate in clinical psychology from the Philadelphia College of Osteopathic Medicine, a program recognized for its training in cognitive-behavioral therapy (CBT). She has specialized in CBT for treatment of anxiety disorders, body dysmorphic disorder, excoriation disorder, and trichotillomania in children, adolescents, and adults since 1994. Dr. Rupertus is a professional member of the International Obsessive-Compulsive Disorder Foundation (IOCDF), The Anxiety and Depression Association of America (ADAA), The Trichotillomania Learning Center (TLC), and The Delaware Psychological Association (DPA). She is co-author of the book Loving Someone with OCD, which was named as one of the 10 Best OCD Books for 2021 by Choosing Therapy ), an online mental health start-up.

Dr. Rupertus is dedicated to helping individuals who are living with an anxiety disorder, not only through the provision of therapy, but also through community education and service. She presents regularly to professionals at several national scientific conferences. Within the community, she delivers educational presentations to area physicians and pediatricians' offices, and public and private school settings. She has also appeared on several television and radio programs discussing topics related to anxiety and its treatment.

In the following video, Medical Anchor Kearni Warren talks to Kathleen M. Rupertus, Psy.D. of The Anxiety and OCD Treatment Center, LLC. Dr. Rupertus explains the symptoms and treatment of OCD.

In the following podcast, Dr. Rupertus sits down with colleague and long-time cherished friend, Chris Leins, to discuss a range of topics from the difference between OCD thoughts and real-world concerns, the so-called "disconfirmation of beliefs" in the treatment of OCD versus the concept of accepting uncertainty; and how family members can love and support their symptomatic loved ones without participating in their compulsive patterns.

Brian Ashenfelter, PsyD

Director of Adult Treatment Services

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Dr. Brian Ashenfelter is a licensed clinical psychologist, and is licensed to practice in Delaware and Pennsylvania. He received both his masters and doctorate from the Philadelphia College of Osteopathic Medicine. He has extensive experience in treating anxiety and depressive disorders with evidence-based treatments, including cognitive behavioral therapy (CBT), exposure and response prevention (ERP), prolonged exposure, and motivational interviewing.

Dr. Ashenfelter is a genuinely compassionate psychologist, who is committed to assisting individuals with maximizing personal growth through a strength-based treatment approach. Treatment plans are collaboratively developed and tailored to meet with the unique needs of each individual.

Dr. Ashenfelter is an enthusiast of all Philadelphia professional sports teams. Outside of work, he enjoys spending time with his wife and children. He is most passionate about cooking, gardening, and listening to music.

Amelia D. Serine, PsyD

Director of Child & Adolescent Services

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Dr. Amelia Serine is a licensed clinical psychologist who specializes in the evidence-based treatment of children, adolescents, and adults affected by anxiety disorde​rs, obsessive-compulsive disorder, ADHD, O-C spectrum disorders, and related conditions. She is trained in cognitive-behavioral approaches, including exposure with response prevention (ERP), comprehensive behavioral treatments for body-focused repetitive behaviors (ComB) and tics (CBIT), mindfulness-based interventions, and acceptance and commitment therapy (ACT). Dr. Serine received specialty training through the Penn Anxiety Program at the University of Pennsylvania in family-focused therapy for anxiety disorders, as well as adjunctive couples and family intervention for individuals with anxiety.

Dr. Serine received her doctorate in clinical psychology from the Philadelphia College of Osteopathic Medicine. She is a professional member of the International Obsessive-Compulsive Disorder Foundation (IOCDF) and the Philadelphia Behavior Therapy Association (PBTA). 

Dr. Serine is passionate about helping individuals with anxiety confront and overcome their biggest challenges to live life on their terms.


Serine, A. D., Rosenfield, B. M., DiTomasso, R. A., Collins, J. M., Rostain, A. L., & Ramsay, J. R. (2020). The relationship between cognitive distortions and adult Attention-Deficit/Hyperactivity Disorder after accounting for comorbidities and personality traits. Cognitive Therapy and Research, 44(5), 967-976.

Kendrick Peer Mugnier, PsyD, LPC

Director of Clinical Training

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Dr. Kendrick Peer Mugnier, better known as “Dr. Peer,” completed his Doctorate in Clinical Psychology from the APA accredited Philadelphia College of Osteopathic Medicine (PCOM). He is a licensed psychologist in Pennsylvania and in Delaware and he is also a Licensed Professional Counselor (LPC) in PA. He completed his post-doctoral fellowship at Belmont Behavioral Health Hospital in Philadelphia, PA. He has more than ten years of experience working with clients who have a wide range of mental health and substance use disorders and he has held leadership positions at multiple organizations. 

Dr. Peer uses evidence-based practices including Cognitive Behavioral Therapy (CBT), Dialectical Behavior Therapy (DBT), and Acceptance and Commitment Therapy (ACT) to address the needs of clients. He adheres to Exposure and Response Prevention (ERP) principles for treating Obsessive Compulsive Disorder (OCD.) Dr. Peer has advanced training in family therapy and believes that that family inclusion is essential to growth for most of his clients. His therapeutic style is direct, collaborative, and grounded in mindfulness and mutual respect. On a personal note, Dr. Peer was once a competitive student athlete and now enjoys spending free time mountain biking, camping, working on home renovation projects, and spending time with family and pets. 

Maureen Gordon, PsyD

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Dr. Maureen Gordon is a Licensed Clinical Psychologist and 2005 graduate of Widener University. Her approach to therapy is collaborative in nature, promoting an atmosphere for clients that is warm and welcoming. Dr. Gordon specializes in individualized treatment for depression and anxiety disorders, as well as distress related to trauma experiences. She focuses on strengths of the client to promote wellness and healing.

Katie Manganello, PsyD

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Dr. Katie Manganello is a graduate of Philadelphia College of Osteopathic Medicine who completed her fourth-year practicum requirement at AOTC throughout 2020-2021. Her training experience had such a meaningful impact, she decided to return for her postdoctoral fellowship, where she is currently fulfilling post-doctoral requirements for licensure as a psychologist.

Dr. Manganello has also trained at the University of Pennsylvania’s Center for Cognitive Therapy, the Lebanon VA Medical Center, and completed her internship at the Coatesville VA Medical Center. Aside from her training in Exposure and Response Prevention Therapy (ERP/EXRP). She has trained in various evidence-based practices including Cognitive Behavior Therapy (CBT) for depression and anxiety disorders, Acceptance Commitment Therapy (ACT), Cognitive Processing Therapy (CPT) and Prolonged Exposure (PE) for PTSD.

Dr. Manganello is an enthusiastic clinician who values collaboration within the therapeutic relationship, is passionate about working with OCD and anxiety-related disorders and enjoys seeing others thrive. In her personal life she enjoys the outdoors, gardening, decorating, and spending time with her pets.

Joining us in January 2023

Patricia Perrin Hull, PhD

Dr. Patricia Perrin Hull is a licensed psychologist specializing in treating OCD, anxiety disorders, OCD spectrum disorders, and postpartum depression and OCD. Conference presentations include the International OCD Foundation, Anxiety Disorders Association of America, Trichotillomania Learning Center, Texas Psychological Association, Houston Psychological Association, Postpartum Support International, MHA of Greater Houston's Conference on Women's Mental Health, and to faculty of Baylor College of Medicine and Universidad de Monterrey, Mexico

Chris J.K. Leins, MA, LPCMH, NCC 

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Chris Leins has been working exclusively with individuals with OCD and other anxiety disorders since 2015. He has co-authored peer-reviewed articles on the diagnosis and treatment of racial trauma within the DSM-5 framework, and has published on the utilization of sacred texts in the effective treatment of religious scrupulosity, a subtype of OCD. 

He is also host of OCD Straight Talk (, a podcast designed both for those who suffer from anxiety disorders and OCD and related disorders, and those who seek to treat this population with greater efficacy.        

Chris believes that the evidence-based psychotherapy is not merely about treating symptoms. Competent therapeutic work is about equipping clients with techniques- and confidence in them through real-time experience-so they can make real progress through the evidence-based processes and also learn to maintain that progress over time. In other words, effective psychotherapy centers on teaching clients to be their own behavior therapists.

Chris is passionate about helping people take their lives back from clinically significant anxiety-symptoms.