Dr. Gabrielle Grinstein is one of New York City's most trusted pediatric endocrinologists, bringing over 30 years of expertise in diagnosing and treating hormonal and metabolic disorders in children and adolescents. Her clinical focus spans the full spectrum of growth disorders — including growth hormone deficiency, short stature, and growth hormone therapy — as well as weight management and metabolic health in teens, thyroid disorders, diabetes, puberty, and adrenal conditions. She is bilingual in English and Spanish. Over her career, Dr. Grinstein served as Director of Pediatric Endocrinology at Beth Israel Hospital and as Assistant Professor Attending at NYU Langone, where she remains affiliated. She earned her medical degree from the Universidad de Buenos Aires and completed her fellowship in Pediatric Endocrinology, Diabetes & Metabolism at Montefiore Medical Center / Albert Einstein College of Medicine. Dr. Grinstein champions a direct-care model — offering pay-per-visit consultations with no insurance gatekeeping, extended appointment times, and rapid response to families. She sees patients from newborns through young adulthood. Parents consistently praise her rare ability to put both children and teenagers at ease, her meticulous diagnostic approach, and her availability between appointments.