Barry Ekdom, Ph.D.
​Clinical Psychologist & NeuroPsychologist

Dr. Ekdom earned his Ph.D. at the University of Iowa, then trained for two years in clinical neuropsychology at the Department of Neurology at North Shore University Hospital, a Cornell affiliate, at Georgetown University Hospital. After three years at a local neurological clinic, Dr. Ekdom began his independent practice and became an adjunct faculty member at the George Washington Medical School, Department of Neurological Surgery. For over twenty years, Dr. Ekdom has been committed to and specialized in high quality diagnostic assessment and consultation with persons two years of age through the elderly. Dr. Ekdom's professional affiliations include the International Neuropsychological Society, the National Academy of Neuropsychology, the American Psychological Association, the International Dyslexia Association, and the Epilepsy Foundation. 

nicole hashemian, PSY.D.
Clinical psychologist & NeuropsychologIst

Dr. Hashemian is a licensed clinical psychologist and neuropsychologist. She earned her doctorate in clinical psychology at the American School of Professional Psychology and completed two years of post-doctoral fellowship in neuropsychology. She has broad experience working with individuals and families with a wide variety of mental health disorders. As part of her clinical training, which included doctoral externships at the Children’s National Medical Center, she has worked collaboratively with multidisciplinary teams performing clinical assessments and utilizing empirically supported treatment methods to care for patients. Dr. Hashemian has presented on topics such as trauma and abuse, assessing and treating eating disorders, models of implementing behavioral healthcare, and nurturing motivation and resilience in children with ADHD. She is fluent in Persian (Farsi) and well-versed in working with culturally diverse populations. Dr. Hashemian is a member of the American Psychological Association (APA) as well as the APA’s Division of Clinical Neuropsychology.​​​​

ranon cortell, PH.D.
​Clinical Psychologist

Dr. Cortell is a licensed psychologist in Maryland and a member of the American Psychological Association.  He received his Ph.D. in clinical psychology from The Catholic University of America and completed his pre-doctoral internship at the Woodburn Center for Community Mental Health where he worked with clients of all ages and varied cultural backgrounds. Dr. Cortell conducts psychological assessments to evaluate learning, attention, emotional, and behavioral challenges and provide appropriate recommendations. He works with children, adolescents, and adults, providing individual and family therapy and psychological assessment. 

Michelle sullivan-gast, PSY.D.
clinical Psychologist

​Dr. Sullivan-Gast earned her Psy.D. in clinical psychology at the American School of Professional Psychology. She trained in neuropsychology at Walter Reed Army Medical Center prior to completing an internship and post-doctoral training in a private practice setting. Dr. Sullivan-Gast has extensive experience working with individuals of all ages, from the very young to the elderly. She is a licensed psychologist in the state of Virginia and has been with the practice since 2009.  

denise krantz, m.S.
​Psychometrist

Denise graduated from The College of St. Rose with a Master’s Degree in Educational Psychology. Prior to joining the practice in 2015, Denise worked on several research projects examining early childhood education programs in DC public and private schools. In her current role, she works with patients of all ages administering accurate assessments while ensuring that the testing process is an enjoyable one.