About Us

Professional Profiles

Dr. Randi Raizner is a licensed psychologist who has an extensive background in neurocognitive disorders, behavior and child development. She specializes in the neuropsychological assessment of children in early childhood through young adulthood. After working as a Research Assistant at the Yale Child Study Center, Dr. Raizner moved to Texas where she obtained a doctoral degree with dual specialization in Neuropsychology and Clinical Psychology at the University of Houston. She acquired additional training at The Regents Center for Learning Disorders and The Marcus Institute at Emory University. After completing an internship at Baylor College of Medicine and Texas Children’s Hospital, Dr. Raizner earned a Post-Doctoral Fellowship through The University of Texas-Health Science Center, Department of Neurosurgery. She worked within the Department of Neurosurgery at The University of Texas-Health Science Center and Memorial-Hermann Hospital. Dr. Raizner has served as a consultant at The Parish School, a specialized school for children with language and learning differences since 2006. Dr. Raizner is experienced in the neuropsychological assessment of children with: communication delays and disorders, autism spectrum disorders, epilepsy, peri-natal trauma, neurotoxicity, traumatic brain injury, affective disorders, anxiety, attention disorders, learning disabilities, adjustment issues, genetic syndromes, and behavioral disorders. Research interests have included: children with attention disorders, traumatic brain injury and epilepsy. Dr. Raizner has published in Developmental Neuropsychology. As a clinical psychologist and neuropsychologist, Dr. Raizner has the unique experience of having provided both neuropsychological assessment and psychotherapy to children. She integrates neurodevelopmental, psychosocial and academic aspects of presenting problems to provide targeted recommendations for the children she serves. She is a member of the Houston Neuropsychological Society, an Affiliate member of the American Academy of Clinical Neuropsychology, and consults with many public and private schools, physicians, speech pathologists, occupational therapists, and mental health practitioners in the area. Dr. Raizner has been helping children and their families in Houston for over 17 years.

Dr. Baruch Williams is a licensed psychologist who specializes in neuropsychological assessment of children and young adults. She obtained a Clinical Psychology doctoral degree at University of Houston, with a specialization in neuropsychology (Child Track). After completing an internship at Baylor College of Medicine/Texas Children’s Hospital, Dr. Williams completed a post-doctoral residency at Kennedy Krieger Institute, Johns Hopkins School of Medicine. She specializes in assessment of attention disorders, learning disabilities, behavioral/affective disorders, epilepsy, prematurity, traumatic brain injury, genetic syndromes, and a host of other medical conditions

Shae Adkins

Shae Adkins, Ph.D. earned a doctoral degree in Educational Psychology and is a certified educational diagnostician. She has experience testing children with learning disabilities, attention deficits, and developmental delays. In addition to conducting testing at Raizner Pediatric Neuropsychology, Dr. Adkins has worked with children and adults of all ages and abilities as a college professor, high school educator, substitute teacher and educational diagnostician intern.


Krista Merchant, M.A. is a Licensed Psychological Associate with extensive experience conducting neuropsychological evaluations with adults and children.  She attended graduate school at Austin Peay University in Clarksville, TN and has been licensed in Kentucky, Tennessee, and now Texas.  She has worked with a variety of populations including those with Alzheimer’s/Dementia, Multiple Sclerosis, strokes, attention problems, learning disabilities, and traumatic brain injury.

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Carla Stech is RPN’s scheduling specialist and has been an integral part of the team since August 2014. She holds her position close to her heart and has enjoyed working with the many lovely families past and present. Carla is available to provide detailed information about the process of seeing a pediatric neuropsychologist and strives to serve each family with compassion and efficiency. Carla looks forward to your phone call and helping with your scheduling needs!

Mariana Vargas is the RPN office administrative assistant. She joined our team in August of 2021. Mariana works closely with Dr. Raizner and the diagnosticians, providing attentive administrative support. Mariana has extensive experience with a multitude of administrative tasks, including scheduling and correspondence. Having held positions in management in the business and medical fields, Mariana is adept at meeting the needs of our RPN families. Mariana looks forward to supporting your needs and offering excellent customer service.