Dr. Weiner is an Assistant Professor of Pediatrics at Weill Cornell Medicine and an Assistant Attending Pediatrician at NewYork-Presbyterian Phyllis and David Komansky Center for Children's Health at Weill Cornell Medical Center. She is board certified in pediatrics, pediatric endocrinology, and obesity medicine.

She received a BA in molecular biology and genetics from Northwestern University, graduating cum laude. She received her medical degree at SUNY Upstate Medical University in Syracuse, New York, where she was inducted into Alpha Omega Alpha Honor Society. She then completed her internship and residency in pediatrics at Children's National Medical Center in Washington D.C. She moved to New York City to be closer to her family, where she completed her fellowship in Pediatric Endocrinology at Columbia University Irving Medical Center. She then pursued an Obesity Medicine Fellowship at Weill Cornell Medical Center.

Dr. Weiner has an interest in Type 1 and Type 2 Diabetes Mellitus, metabolic syndrome, obesity medicine, growth, puberty, bone health, and thyroid conditions. She has been involved in research studies related to obesity, diabetes mellitus, and bone health. She has been published in peer-reviewed journals and has presented her work at national meetings.