Mauricio J DeCastro, MD

Dr. Mauricio De Castro is a board-certified clinical geneticist specializing in the diagnosis and management of rare genetic disorders affecting children and adults. He believes that every patient deserves an accurate diagnosis and a clear understanding of their condition. He partners closely with patients and families to navigate complex genetic disorders, explain advanced genetic testing, and develop personalized treatment plans. He is particularly passionate about translating advances in genomic medicine into meaningful improvements in patient care and helping families access the rapidly expanding field of precision therapeutics.

Prior to joining Stony Brook Medicine, Dr. De Castro served for more than two decases as a physician in the United States Air Force while also holding academic and leadership positions in clinical genetics and molecular diagnostics. At Stony Brook Medicine, Dr. De Castro is committed to building a comprehensive genetics program that integrates state-of-the-art genomic diagnostics with multidisciplinary clinical care. His goal is to expand access to cutting edge diagnostic testing and novel therapies - including gene therapy, enzyme replacement therapy, and other precision treatments - while providing compassionate, evidence-based care for individuals and families affected by rare genetic disease.