Dr. Leah Biller is an Assistant Professor of Medicine at Harvard Medical School and a physician in the Gastrointestinal Cancer Center and the Cancer Genetics and Prevention Center at Dana-Farber Cancer Institute, where she has been on faculty since 2019. She specializes in the care of patients with cancers of the gastrointestinal tract, with particular expertise in hereditary cancer predisposition syndromes and young-onset gastrointestinal malignancies. Her work focuses on improving risk assessment, early detection, and treatment personalization for patients and families affected by inherited cancer syndromes and gastrointestinal cancers.