Pediatric Neuropsychology and Therapy Services LLC

Specializing in Neuropsychological Assessment and


75 N Maple Ave, Suite 101B, Ridgewood, NJ 07450

Catherine O'Sullivan, PsyD

Licensed Psychologist Specializing in Pediatric Neuropsychology and Psychotherapy 

Catherine O’Sullivan, Psy.D., received her Doctor of Psychology degree from St. John’s University. Dr. O'Sullivan achieved membership in Pi Gamma Mu, Psi Chi, and Alpha Chi Honor Societies, and she was awarded the Dr. Erica Wick Vincentian Mission Award for her commitment to helping those in need.

Throughout her training and professional experience in the field of Psychology, Dr. O'Sullivan developed skills in neuropsychological and psychoeducational assessment, psychotherapy, parent training, and behavioral management of children and young adults. She has received training in many institutions, including schools in Rockland County, Albert Einstein College of Medicine, NYU Child Study Center in the Autism Spectrum Disorders Clinical and Research Program, Blythedale Children’s Hospital, and the Center for Psychological Services at St. John’s University. She also has specific training and experience in working with individuals affected with a range of developmental and intellectual disabilities.

Dr. O’Sullivan has specialized experience in Cognitive Behavioral Therapy, working with children on the Autism Spectrum, helping children with a history of chronic school failure, brain injuries, and learning disabilities. She also has specific knowledge and training in School Psychology, which facilitates her ability to make appropriate recommendations for children with special needs. Later, while ma 2 year post-doctoral fellowship in a prestigious neuropsychology private practice in Ridgewood, NJ, she received extensive training and guidance in the diagnosis, remediation, and accommodation of learning disabilities and neurocognitive disorders, especially dyslexia and learning disabilities.

Contact Dr. O'Sullivan for more information.

Helen Tam, PhD, received her doctorate in Clinical Psychology with specialization in Cognitive and Affective Neurosciences from Penn State University after completing a Master's degree in Physiological Neurosciences from UCLA with specialization in Neuroendocrinology as well as a Master's degree in Psychology in the Child Clinical Track from Penn State University. She completed her post-doctoral training at NYU in the Hassenfeld Children's Hospital, where she now acts as an associate professor. Dr. Tam is licensed as a psychologist in NY and has a permit to practice in NJ (TP# 181-A012). Throughout her experience as a neuropsychologist, Dr. Tam has gained expertise in assessing children and young adults affected with a variety of challenges, including ADHD, autism spectrum disorders, specific learning disabilities, brain injuries, and secondary effects of cancer and cardiac events.