Pediatric Stroke Program

Meet Our Team


Marisol Betensky, M.D. Hematology / Oncology

Dr. Betensky specializes in hemostasis and thrombosis in the Johns Hopkins All Children’s Cancer & Blood Disorders Institute. She also treats bone marrow failure syndromes and congenital and acquired neutropenias, which are immune system conditions that may result in infections. She joined the hospital in 2016. Previously, she was an instructor in the Division of Hematology, Comprehensive Bone Marrow Failure Center at Children’s Hospital of Philadelphia.
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Neil A. Goldenberg, MD, PhD Hematology / Oncology

Dr. Goldenberg was named director of research at Johns Hopkins All Children's Hospital in July 2012 as well as chief research officer of the Johns Hopkins All Children's Research Institute and director of the new Clinical and Translational Research Organization at JHACH. He is an associate professor of pediatrics and medicine at the Johns Hopkins University School of Medicine.
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Thomas Geller, M.D. Neurology

Dr. Geller specializes in pediatric neurology for the Johns Hopkins All Children’s Institute for Brain Protection Sciences. He sees patients at the main campus in St. Petersburg and at Johns Hopkins All Children’s Outpatient Care, North Port. He joined the hospital staff in 2018. Dr. Geller previously was a pediatric neurologist and child neurology residency program director at Cardinal Glennon Children's Medical Center in St. Louis, Missouri. He retired as a captain from the U.S. Navy Medical Corps. His clinical and research interests include neurofibromatosis, neuro-oncology and pain management.
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Peter Huszar, M.D. Neurology

Dr. Huszar specializes in pediatric neurology in the Johns Hopkins All Children’s Institute for Brain Protection Sciences. His clinical and research interests include neonatal and childhood cerebrovascular disorders and childhood primary headaches. He joined the hospital staff in 2014 after previously working for the Children's Hospital and Clinics of Minnesota. Dr. Huszar received his medical degree from Albert Szent-Gyorgyi Medical University (SZOTE) in Szeged, Hungary. Dr. Huszar trained in pediatrics at Erzsebet Hospital in Hodmezovasarhely, Hungary and SUNY Downstate Medical Center in Brooklyn, New York. He then completed a pediatric neurology residency/fellowship at SUNY Downstate Medical Center.
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Jennifer Katzenstein, Ph.D. Psychiatry / Psychology

Dr. Katzenstein is the director of psychology and neuropsychology 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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Javier Quintana, M.D. Radiology

Dr. Quintana is a radiologist at Johns Hopkins All Children’s Hospital. He joined hospital staff in 2010. Dr. Quintana earned his medical degree at the University of South Florida. He trained in general pediatrics at Jackson Memorial Hospital/University of Miami and completed a diagnostic radiology residency at Geisinger Medical Center in Danville, Pennsylvania. Dr. Quintana completed a pediatric radiology fellowship at Children’s Hospital of Philadelphia. He is fluent in Spanish.
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Dennis Hart, M.D. Physical Medicine / Rehab

Dr. Hart is the senior director of rehabilitation services at Johns Hopkins All Children’s Hospital and is an assistant professor of pediatrics for the Johns Hopkins University School of Medicine. His clinical interests include functional outcomes in pediatric and adolescents with chronic pain and evaluating the relationship between mental health and chronic pain. After graduating from the University of Texas Health Sciences Center at San Antonio, Dr. Hart completed a residency at the University of Kentucky Medical Center and a fellowship at the University of California Davis Medical Center. He is board certified in physical medicine and rehabilitation and pediatric rehabilitation medicine.
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Care Coordinator

Katie Mills, A.P.R.N.

Katie Mills, A.P.R.N. Care Coordinator, Stroke Program