Neuropsychology Team

Sakina Butt, PsyD

Sakina Butt, PsyD

Psychiatry / Psychology
Dr. Butt is a neuropsychologist at Johns Hopkins All Children’s Hospital. She joined the hospital staff in 2019. Some of Dr. Butt’s areas of clinical expertise include neuropsychological evaluations and consultations for children in the neonatal intensive care unit and pediatric intensive care unit.
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Colleen Hess, PhD

Colleen Hess, PhD

Psychiatry / Psychology
Dr. Hess is a neuropsychologist at Johns Hopkins All Children’s Hospital. She joined the hospital staff in 2021. Her clinical expertise includes neuropsychological evaluations and consultations for children with cancer and brain tumors. Dr. Hess earned her doctoral degree from Florida State University in Tallahassee, Florida. She completed a clinical psychology internship at the University of Florida Health Science Center/Shands Hospital in Gainesville, Florida, followed by a fellowship in clinical psychology at Rothman Center for Pediatric Neuropsychiatry/University of South Florida in St. Petersburg, Florida. Dr. Hess then completed a pediatric neuropsychology fellowship at Johns Hopkins All Children’s Hospital. 
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Jennifer Katzenstein, PhD

Jennifer Katzenstein, PhD

Psychiatry / Psychology
Dr. Katzenstein is the director of psychology, neuropsychology and social work, at Johns Hopkins All Children’s Hospital. Previously, Dr. Katzenstein was a private practitioner and Assistant Professor of Neurology at Indiana University School of Medicine/Riley Hospital for Children in Indianapolis where she provided neuropsychological evaluations, consultations and academic coaching for children and adolescents. After graduating from Indiana University Purdue University Indianapolis, she completed a pediatric internship and fellowship at Texas Children's Hospital/Baylor College of Medicine. Dr. Katzenstein is board certified in pediatric neuropsychology and clinical neuropsychology.
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Danielle Ransom, PsyD

Danielle Ransom, PsyD

Psychiatry / Psychology
Dr. Ransom specializes in neuropsychology at Johns Hopkins All Children’s Hospital. She joined the medical staff in 2019. Before joining Johns Hopkins All Children’s, Dr. Ransom was an assistant professor at the University of Miami Miller School of Medicine where she co-directed the Pediatric Concussion Clinic and developed the neuropsychology arm of the Sports Concussion Clinic.
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Kyle Srnka, Ph.D.

Kyle Srnka, Ph.D.

Neuropsychology Fellow - Second Year

Nora Coultis, Ph.D.

Nora Coultis, Ph.D.

Neuropsychology Fellow - First Year