Dr. James Thatcher Psy. D

Dr. James Thatcher is a licensed psychologist specializing in comprehensive psychological and neurodevelopmental evaluations for autism spectrum disorder, ADHD, learning disabilities, and diagnostic clarification. He works with both adults seeking answers for themselves and parents seeking evaluations for their children and adolescents.

Dr. Thatcher has conducted more than 2,000 diagnostic evaluations and has extensive experience identifying autism across the lifespan, including late-identified autism and individuals who have learned to mask or camouflage their traits. His approach focuses on providing clear, accurate answers while helping individuals and families better understand how their nervous system processes the world.

His comprehensive autism assessments incorporate gold-standard diagnostic tools, including the ADOS-2 (Autism Diagnostic Observation Schedule), ADI-R (Autism Diagnostic Interview-Revised), BASC-3, and ABAS-3, along with detailed developmental history and …cognitive and learning assessment when needed. These evaluations are designed to provide diagnostic clarity and practical recommendations that can be used by families, schools, and treatment providers.

Dr. Thatcher is known for offering one of the most efficient and comprehensive autism evaluation processes in the Portland area. Testing is typically completed in a single day, and patients often receive clear diagnostic feedback the same day, with a detailed written report provided shortly after. His reports are frequently used to support school accommodations, therapy planning, and workplace support.

Based in Lake Oswego, Oregon, Dr. Thatcher serves individuals and families throughout the Portland metro area, including Beaverton and surrounding communities.

In addition to his assessment work, Dr. Thatcher has years of experience providing therapy for neurodivergent children and adolescents, giving him a deeper understanding of the real-world challenges families face and allowing him to offer practical, strengths-based recommendations during the evaluation process.

His goal in every evaluation is not only to determine whether autism, ADHD, or a learning difference is present, but to help individuals and families gain clarity, reduce uncertainty, and move forward with a better understanding of how to support success. Book your Free Consultation Today!