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David Lewallen, Psy.D.

Dr. David Lewallen is a licensed psychologist who provides individual therapy services to adolescents, adults, and older adults (12-65+). David works with individuals who are seeking help for ADHD, anxiety, high functioning autism spectrum disorder, depression, hoarding, adjustment to life transitions, relationships, spirituality/faith issues, and screen time issues.


Dr. Lewallen builds a collaborative relationship with each client to foster better understanding of how each person’s thoughts, feelings, and behavior affect one another and the family or friends around them. He collaborates with individuals to develop personalized evidenced based treatment plans while honoring each person’s unique background. David enjoys providing a warm, friendly, and appropriately humorous atmosphere in sessions. He incorporates the individuals intersecting identities including but not limited to race, ethnicity, identity, religion, socio-economic status, and physical ability to personalize therapy. David draws from an integrative approach utilizing Cognitive Behavioral Therapy (CBT), Acceptance and Commitment Therapy (ACT), and Humanistic perspectives in his clinical work.


Dr. Lewallen’s journey to becoming a psychologist started with a “never say never lesson.” At a mere 12 years old David told his father that he would never go to “Carroll College” and that he 

would never become a “Doctor.” Fast forward to 2020 and David learned his lesson after he graduated from Carroll College and graduated from Pacific University with a doctoral degree (Psy.D) in Clinical Psychology in 2020. As part of this journey, he wrote a dissertation on Screen-time and parenting. He completed his pre-doctoral internship at Centerstone Consortium in Florida working in a community mental health center with adults and adolescents who struggled with anxiety disorders, mood disorders, behavioral issues, ADHD, schizophrenia, and adjusting to mild brain injuries. He performed psychological assessment with children to determine learning disorders, autism, ADHD, and behavioral issues. David’s post-doctoral work was done at Sundstrom Clinical services where he continued to hone his therapy and assessment skills.


Outside of his clinical work Dr. Lewallen, his wife, and daughter spend their time traveling, with family, and with friends. Dr. Lewallen has a wide range of interests from art, such as bonsai (one or two may be in his office at a given time) to full distance Ironman triathlon’s (not in office). Oh, yes and the occasional video game and book.

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