Outpatient Psychiatry Center Psychotherapists

Home | Clinicians | Psychotherapists | Services | Contact 

Meet the Penn Medicine Clinical Faculty and Staff 

Jeremy Tyler, Psy.D., Assistant Professor of Clinical Psychiatry
Director of Psychotherapy

Jeremy Tyler

Dr. Jeremy Tyler (he/him) is the Director of Psychotherapy at the Outpatient Psychotherapy Center, a Licensed Clinical Psychologist, and Assistant Professor of Clinical Psychiatry at the Perelman School of Medicine. Dr. Tyler has 13 years of clinical experience spanning a broad range of clinical populations, including the delivery of police-based crisis intervention with the Baltimore County Police Department, inpatient psychotherapy at the Forensic and Civil sections of Norristown State Hospital, and evidence-based treatments for OCD, PTSD, and Anxiety Disorders. Dr. Tyler completed his pre-doctoral internship at the Dallas VA Medical Center, with specializations in PTSD, Military Sexual Trauma, Substance Abuse, General Outpatient, and the Spinal Cord Injury. Dr. Tyler completed his postdoctoral fellowship at the University of Pennsylvania, Center for the Treatment and Study of Anxiety (CTSA), specializing in evidence-based treatments for OCD, PTSD, and anxiety disorders.

Dr. Tyler is a proponent of evidence-based treatment and an expert in exposure-based cognitive behavioral therapy. He is engaged in research on OCD, PTSD, and Anxiety Disorders, with an emphasis on understanding the role of transdiagnostic mechanisms involved in the treatment of OCD, PTSD, and anxiety disorders, with a particular interest in the role of anxiety sensitivity, perfectionism and emotion regulation. Dr. Tyler is highly involved in clinical teaching in the School of Medicine and regularly engages in teaching locally, nationally, and internationally.

Marty Cheatle, Ph.D., Associate Professor of Psychology in Psychiatry
Director of Behavioral Medicine at the Penn Pain Medicine Center and Director of Pain and Chemical Dependency Research at the Center for Studies of Addiction

Dr. Cheatle is an Associate Professor of Psychology in Psychiatry and Associate Professor of Anesthesiology and Critical Care; Director of Behavioral Medicine at the Penn Pain Medicine Center and Director of Pain and Chemical Dependency Research at the Center for Studies of Addiction, Perelman School of Medicine at the University of Pennsylvania. He was the PI of a recently completed RO1 NIDA grant on clinical and genetic characteristics of opioid addiction in chronic pain; PI of a grant examining the efficacy of various drug-monitoring matrices in detecting misuse of prescription opioids; a project PI of a NIDA P-60 Center grant on a longitudinal study of the development of addiction in patients initiating prescription opioid therapy for chronic pain in primary care. Currently, he is co-investigator of a NIH R01 examining the role of opioid adherence profiles in cancer pain self – management and outcomes; co-I in a R21 evaluating the effect of CBD in reducing pain and opioid use; and PI in a recently funded R21 assessing the efficacy of a preoperative CBT program in patients undergoing total knee arthroplasties in reducing post operative pain and reducing the risk of developing chronic post surgical pain.  The focus of his research and clinical practice is in improving pain care to individuals from vulnerable populations (psychiatric, addiction, HIV, risk of suicide) including developing multimodal approaches to managing chronic pain and providing cognitive behavior therapy and Acceptance Commitment Therapy to improve pain coping skills in individuals who suffer from chronic pain.

Anaya Kellogg, LCSW, Staff Psychotherapist 

Anaya Kellogg

Anaya Kellogg (Erika Anaya Kellogg) is a Licensed Clinical Social Worker at the Penn Outpatient Psychiatry Center and at the Charles O'Brien Center for Addiction Treatment.  Anaya also serves as the Director and Educational Supervisor for the DBT Training Program in the Department of Psychiatry at Penn Medicine.  Anaya is a board certified DBT Clinician through the DBT-Linehan board of Certification. Anaya also holds the Advanced Alcohol and Drug Counseling designation through the Pennsylvania Certification Board.  Anaya primarily works with adults experiencing suicidal ideation, non-suicidal self-injury and substance us disorders.  In treatment she uses a variety of therapeutic approaches including Dialectical Behavioral Therapy (DBT), Cognitive Behavioral Therapy (CBT) and Motivational Interviewing.

Elizabeth Kingfield, Psy.D., Staff Psychologist 

Elizabeth Kingfield

Dr. Elizabeth Kingfield (she/her/hers) is an integrative therapist, providing primarily feminist/multicultural therapy and interpersonal process therapy with a focus on trauma-informed care and cultural responsiveness. She is also trained in several time-limited evidence-based therapies including prolonged exposure therapy, cognitive behavioral therapy for insomnia, and supportive-expressive dynamic therapy. She cofacilitates the virtual DBT skills group and has provided trainings for therapy students and psychiatry residents on relational-cultural therapy and working with trans and gender-nonconforming clients.

Walter Matweychuk, Ph.D., Staff Psychologist


Dr. Matweychuk received his B.A. and M.S. from the University of Pennsylvania and his Ph.D. in clinical and school psychology from Hofstra University. He was the scribe for Dr. Aaron T. Beck's weekly post-doctoral supervision at the Center for Cognitive Therapy from 1979-81. He was formally trained in Rational Emotive Behavior Therapy by Dr. Albert Ellis. These two pioneers of cognitive-behavior therapy have had a profound influence on his practice of psychotherapy. He is the author of three books on REBT and has written on the similarities and differences between Beck's Cognitive-Behavior Therapy and Rational-Emotive-Behavior-Therapy. Dr. Matweychuk is an adjunct professor of Applied Psychology at New York University and maintains REBTDoctor.com. Dr. Matweychuk has served as a subject matter expert for an emotional fitness project involving REBT to the United States Navy (2018-19).

Kevin McCarthy, Ph.D., Clinical Associate Professor of Psychology in Psychiatry

Kevin McCarthy, Ph.D., completed his doctorate in clinical psychology at the University of Pennsylvania in 2009 with an internship and postdoctoral residency at Pennsylvania Hospital and a fellowship at the Psychoanalytic Center of Philadelphia. He is currently a faculty member in the Health Services Psychology Department at Chestnut Hill College and in the Department of Psychiatry at the University of Pennsylvania. Teaching and supervision is a primary focus for him, and he is especially interested in helping beginning psychotherapists develop their skills, confidence, and personal style. He is a 2012 graduate of the Psychoanalytic and Psychodynamic Teacher’s Academy of the American Psychoanalytic Association​ where he completed a project on teaching "lab skills" in dynamic techniques. His research focus is on the process and outcome of psychotherapy, and most recently the effect of the current political environment on therapy. He has over 50 peer-reviewed publications, book chapters, and reviews, including some with Penn Residency co-authors.  Dr. McCarthy is the recipient of the 2017 Marvin R. Goldfried New Researcher Award through the Society for the Exploration of Psychotherapy Integration, the 2018 Outstanding Early Career Award through the Society for Psychotherapy Research, and a 2014 Honorable Mention for the Young Researcher Award through the International Federation for Psychotherapy.  He is currently President of the North American Society for Psychotherapy Research. 

Kathryn Souder, LCSW, Staff Psychotherapist 

Katie Sauder

Katie Souder (she/her) is a Licensed Clinical Social Worker at the Penn Outpatient Psychiatry Center.  Her therapeutic approach primarily incorporates Acceptance and Commitment Therapy (ACT) and Dialectical Behavioral Therapy (DBT) with an emphasis on cultivating mindfulness, clarifying and acting on values, building skills, and practicing acceptance.  In addition to providing individual psychotherapy, she facilitates one of the DBT Skills Groups at the OPC.  Prior to coming to the OPC, she has worked in a variety of settings including schools, hospitals, and outpatient settings.  She is grateful for the opportunity to serve a diverse population with a variety of clinical needs at the OPC.

Nasim Chatha, LCSW, Staff Psychotherapist

Nasim Chatha

Nasim Chatha (she/her) is a Licensed Clinical Social Worker at the Penn Outpatient Psychiatry Center. Her approach to therapy is psychodynamic and relational. She works with people to notice patterns in how they relate to themselves and others and to build insight into how their pasts may be shaping their present experiences. Nasim is also trained in Cognitive Processing Therapy (CPT), a cognitive behavioral therapy that addresses symptoms of PTSD. She has previous clinical experience in a hospital outpatient setting, providing therapy to LGBTQ+ adults, and working in college mental health.  

Sally Minkovich, Psy.D., Postdoctoral Fellow

Dr. Minkovich (she/her/hers), is a postdoctoral fellow at the Penn Outpatient Psychiatry Center. Dr. Minkovich received her B.A. from Temple University with a major in Psychology and a minor in English. She then completed her master's degree in Psychology in Education from Teachers College, Columbia University during which time she co-authored a chapter on the necessity of supervision for a textbook in Russia. Dr. Minkovich then obtained her M.A and Psy.D. in Clinical Psychology from La Salle University in 2022. During her training, she utilized evidence-based practices to work with a range of ages from children to adults and across settings including, schools, universities, acute inpatient hospitals, and community mental health. Dr. Minkovich completed her predoctoral internship at Holcomb Behavioral Health Systems where she provided individual and group therapy for substance abuse treatment, children and families, and individuals within a subacute residential program. Dr. Minkovich has a strong background in Cognitive Behavioral Therapy and Dialectical Behavioral Therapy, which she uses in her work with individuals experiencing depression, anxiety, self-injurious behaviors, relational challenges, and trauma. 

Doug Bogdanoff, LCSW

Heather Zukin, LSW

Heather Zukin

Heather Zukin (she/her) is a licensed social worker and psychotherapist at the Penn Outpatient Psychiatry Center and earned her Master of Social Service (MSS) from Bryn Mawr College.  Heather’s primary approach to treatment incorporates Dialectical Behavior Therapy (DBT) with an emphasis on trauma-informed and strengths-based care, working with individuals to identify and reinforce their strengths and providing them with new skills with which to create their life worth living. Heather has experience working with individuals of all ages in both outpatient and inpatient settings in the Philadelphia area, including individual and group treatment.

Wydia Houston, LCSW, Staff Psychotherapist

Wydia Houston

Wydia Houston, MSW, LCSW (she/her) is a Licensed Clinical Social Worker at the Penn Outpatient Psychiatry Center. Her approach to care is integrative with a strong focus on strengths based perspectives, incorporates CBT, psychodynamics and is trauma-informed. Wydia assists in helping people uncover their own strengths, consider new perspectives and possibilities, and helps in understanding past lived experiences to understand current behaviors and thought processes to be challenged. Wydia is a certified Diversity, Equity and Inclusion Specialist and is passionate about working within diverse populations and ensuring that therapeutic spaces remain inclusive. Prior to coming to the OPC, she has worked in a variety of settings including college counseling, hospitals and residential treatment facilities.

Lily Assaad, Ph.D., Postdoctoral Fellow

Lily Assaad

Lily Assaad, Ph.D. (she/her), is a postdoctoral fellow at the Outpatient Psychiatry Center within the Perelman School of Medicine. She completed her clinical psychology residency at the University of Washington School of Medicine (specializing in DBT, PTSD, Insomnia, and OCD) and obtained her PhD from Purdue University (researching personality disorders and intimate relationships), both of which function within the Clinical Scientist model. In addition to publishing and presenting on her research extensively, she has experience working in eight medical settings. These settings include the University of Washington Medical Center, Harborview Medical Center, three clinics in the VA Illiana Health Care System (residential SUDs, PTSD, and behavioral health), three clinics at the Purdue Psychological Treatment and Research Center (Adult-, Child-, and Neuropsychological Assessment-focused), a randomized control trial (RCT), and Alpine Health’s Neuropsychological Assessment Clinic.

Dr. Assaad is experienced in evidence-based assessment using numerous neuropsychological, cognitive, and personality measures. She also has expertise in the provision of full doses of empirically supported treatments (ESTs) within individual, couple, and group therapy formats. Such ESTs include Standard (i.e., full-model) DBT, PE, CPT, ExRP for OCD, ACT, BA, CBT for ADHD, CBT for Insomnia, EFT and IBCT for couples, and MI for SUDs. However, she primarily specializes in Standard DBT, PE, and CPT.

Finally, this is Dr. Assaad’s fifth year supervising clinicians, including psychiatrists, medical students, and clinical psychology trainees. As a supervisor, she aims to create an engaging, productive, and safe environment in which medical providers can efficiently refine their culturally conscious assessment and intervention skills to ultimately increase access to EBTs for patients who need it.

David Siegel, Psy.D., Postdoctoral Fellow

David Siegel

David Siegel, Psy.D. (he/him), is a postdoctoral fellow at the Outpatient Psychiatry Center at the University of Pennsylvania, Perelman School of Medicine.  Dr. Siegel has a range of clinical experiences with school and hospital, inpatient and outpatient, and individual and couple populations. Most recently, Dr. Siegel completed his pre doctoral internship at Jacobi Medical Center, the largest public hospital in the Bronx, providing outpatient therapy to diverse, underserved clients while also completing additional rotations specializing in psychiatric emergency, consultation-liaison, substance use, and psycho-oncology.

Currently, Dr. Siegel treats severe mental illness (SMI) among psychotic, mood, and personality disorders in individuals presenting with psychosis and suicide related symptoms. Dr. Siegel employs a variety of therapeutic techniques with these populations by integrating psychodynamic, cognitive-behavioral, and mindfulness-based theoretical orientations. Dr. Siegel's additional areas of interest includes expanding care to underserved, low socioeconomic populations.

Training Programs 

Clinical Psychology Externship

Contact Dr. Jeremy Tyler; jeremyty@pennmedicine.upenn.edu

The Outpatient Psychiatry Center is accepting applicants for externship. Interested applicants are strongly encouraged to join our virtual open house on Thursday, January 5th at 2:30pm. Please RSVP → HERE

To learn more about our externship training, please see our PENDELDOT posting → HERE


Clinical Psychology Postdoctoral Fellowship 

Contact Dr. Jeremy Tyler; jeremyty@pennmedicine.upenn.edu

Penn Psychiatry is currently accepting clinical psychology postdoctoral fellowship applications for the fall 2023 academic year. To learn more and submit your application, please visit  the application portal → HERE 


Masters of Social Work Clinical Internship

Contact Anaya Kellogg, LCSW; Anaya.Kellogg@Pennmedicine.upenn.edu


Back to Top