Theresa Regan, PhD, CAS

Dr. Theresa Regan is a neuropsychologist specializing in brain-behavior relationships across the lifespan, with particular expertise in autism assessment and consultation for adolescents and adults. She is the founder and director of an adult autism diagnostic clinic and has extensive experience helping autistic individuals, couples, families, and clinicians better understand the relationship between neurologic processing, communication, emotional regulation, and daily functioning.

Dr. Regan is the author of the Understanding Autism book series, including Understanding Communication and Relationships in Autism: Improving Connection Across Neurodiversity. She is also host of the podcast Autism in the Adult, where she translates complex neurologic and developmental concepts into practical, real-world applications for clinicians, autistic individuals, and families. In addition to her professional work, she is the parent of an autistic young adult, bringing both clinical and lived household experience to her work with neurodiverse individuals and families. Her teaching style emphasizes respectful, neurology-informed approaches that reduce blame while improving communication, insight, and connection across neurotypes.