Experience

  • Private Practice, 2023-current

  • Seattle Children’s Hospital, Outpatient Psychiatry and Behavioral Medicine: Consulting Medical Staff, 2024-current; Primary Psychologist, Anxiety Intensive Program, 2023-2024; Staff Psychologist, 2021-2024

  • The Pediatric Center at Lester E. Cox Medical Center South, Staff Psychologist, 2019-2021

Training

  • The Pediatric Center at Lester E. Cox Medical Center South, post-doctoral fellowship in primary care, 2018-2019

  • Royal Oaks Hospital, National Psychology Training Consortium, pre-doctoral internship with emphasis in acute psychiatry services (APA-accredited), 2017-2018

  • The Rothman Center for Pediatric Neuropsychiatry, University of South Florida, graduate research assistant and practicum student, 2012-2015

Education

  • Psy.D., Florida School of Professional Psychology (APA-accredited), 2018

  • M.A., Florida School of Professional Psychology, 2013

  • B.A., University of South Florida, 2010

Publications and Research

Diana Bastien, Psy.D., ABPP

I am a licensed clinical psychologist and board-certified specialist in Clinical Child and Adolescent Psychology (ABPP), a distinction held by a limited number of psychologists in the United States. I also serve as a Consulting Psychologist at Seattle Children’s Hospital. My practice specializes in the evaluation and evidence-based treatment of pediatric obsessive-compulsive disorder (OCD), anxiety disorders, and specific phobias, with particular expertise in complex presentations and children who have not responded as expected to previous treatment.

My clinical approach emphasizes comprehensive diagnostic assessment, careful differential diagnosis, individualized case conceptualization, and evidence-based treatment. I recognize that symptoms may overlap across psychiatric and neurodevelopmental conditions and that effective intervention requires understanding the processes contributing to and maintaining a child’s difficulties. I value clear communication, thoughtful clinical recommendations, and active collaboration with families throughout assessment and treatment.

From 2012 to 2015, I completed clinical practica at the Rothman Center for Pediatric Neuropsychiatry, receiving specialized training and supervision from leading experts in pediatric obsessive-compulsive disorder (OCD). During this period, I also served for two years as a graduate and clinical assistant to a physician-researcher and member of the PANS/PANDAS Research Consortium. This role provided extensive opportunities for direct supervision and specialized training in pediatric acute-onset neuropsychiatric syndrome (PANS) and pediatric autoimmune neuropsychiatric disorders associated with streptococcal infections (PANDAS). My additional professional training includes completion of the International OCD Foundation’s Pediatric Behavior Therapy Training Institute (BTTI).

I earned my Psy.D. in Clinical Psychology and have trained and worked across pediatric primary care, children’s hospital, academic, intensive outpatient, and private practice settings. At Seattle Children’s Hospital, I previously served as a clinical psychologist and lead psychologist for the Anxiety Intensive Outpatient Program, working with youth and families experiencing complex and impairing anxiety disorders. These experiences inform my approach to diagnostic clarification, individualized treatment planning, and the application of evidence-based interventions to complex clinical presentations.

I maintain licensure in multiple states and hold authorization to practice interjurisdictional telepsychology through PSYPACT, allowing me to provide specialized services to families across participating jurisdictions. I also remain involved in professional organizations and mentorship, both to stay engaged with developments in the field and to contribute to the training of future psychologists.

Outside of work, I enjoy spending time with my family and my two cats—a calico and a ragdoll—who occasionally make unplanned appearances during telehealth sessions. A Florida native, I enjoy many aspects of living in the Pacific Northwest, none of which involve hiking.