22q Deletion Syndrome Team
Pediatrics
Dr. Montes is a Pediatric and Adolescent Medicine physician in the Johns Hopkins All Children’s Department of Pediatric Medicine, seeing patients in Sarasota, Florida. He joined the medical staff in 2019. Some of Dr. Montes areas of clinical expertise include pediatric rehabilitation and caring for children with disabilities.
Jordan Halsey, MD
Plastic Surgery
Dr. Halsey is a pediatric plastic surgeon at Johns Hopkins All Children’s Hospital and an assistant professor in the Johns Hopkins University School of Medicine Department of Plastic and Reconstructive Surgery. She joined the hospital staff in 2021. Dr. Halsey earned her medical degree from the University of Tennessee Health Science Center College of Medicine in Memphis, Tennessee. She completed a residency in integrated plastic surgery from Rutgers-New Jersey Medical School in Newark, New Jersey, where she was administrative chief resident. She then completed a fellowship in pediatric craniofacial surgery from Nationwide Children’s Hospital in Columbus, Ohio.
Melissa Crenshaw, MD
Medical Genetics
Dr. Crenshaw is the medical director for the Clinical Genetics Program at Johns Hopkins All Children’s Hospital and also serves as an assistant professor with Johns Hopkins Medicine. Her research interests include congenital heart defects, chromosome abnormalities and Turner Syndrome. She has additional expertise in the genetics of congenital heart disease and connective tissue disorders. Dr. Crenshaw is board certified in pediatrics and clinical genetics.
Jeremy Ramey, MD
Pediatric Cardiology
Dr. Ramey is a general pediatric cardiologist who provides inpatient and outpatient care for children with congenital heart disease. He completed a pediatric cardiology fellowship at Columbia University College of Physicians & Surgeons, New York and Morgan Stanley Children’s Hospital at New York Presbyterian, where he also served as chief pediatric cardiology fellow. He received his medical degree from Marshall University in Huntington, West Virginia and completed his pediatric residency at UMDNJ-Robert Wood Johnson University Hospital and Bristol Myers Squibb Children’s Hospital in New Brunswick, New Jersey.
Alyssa Fritz, PhD
Psychology
Dr. Fritz is a pediatric psychologist in the Johns Hopkins All Children’s Hough Family Institute for Brain Protection Sciences. She joined the hospital staff in 2018. Dr. Fritz provides evidence-based interventions for pre-school and early childhood disruptive behavior disorders. She also specializes in the evaluation and treatment of children and adolescents diagnosed with chronic and/or acute medical conditions in combination with additional concerns (e.g., anxiety, depression, treatment adherence, phobias) in outpatient settings.
Jolan Walter, MD, PhD
Allergy and Immunology
Dr. Walter is the division chief of the University of South Florida (USF) and Johns Hopkins All Children’s Pediatric Allergy & Immunology Programs. She is the Robert A. Good Endowed Chair of the USF Division of Pediatric Allergy & Immunology, and an associate professor of pediatrics, medicine and molecular biology in the USF Morsani College of Medicine. She serves as director of the Jeffrey Modell Diagnostic and Research Center for Primary Immunodeficiencies at Johns Hopkins All Children’s. Her research interests include understanding the (severe) combined immunodeficiencies, and breech in tolerance in primary immune disorders leading to autoimmunity and inflammation. Dr. Walter has specific clinical expertise in the diagnosis and treatment of patients with (severe) combined immunodeficiencies, in particular those with recombination activating gene (RAG) variants. She is focusing on genetic evaluation, mechanism-based treatment therapies for non-infectious complications and involved in the care of patients with definitive therapies such as hematopoietic stem cell transplantation (HSCT) and gene therapy protocols.
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