Faculty Directory

Mei-Sing Ong

Assistant Professor

Mei-Sing Ong, PhD, is an Assistant Professor in the Department of Population Medicine at Harvard Medical School and Harvard Pilgrim Health Care Institute. She received her PhD in Health Informatics from the University of New South Wales in Australia and completed her postdoctoral fellowship at the Computational Health Informatics Program at Boston Children’s Hospital and the Department of Biomedical Informatics at Harvard Medical School.

As a scientist working at the intersection of informatics and medicine, Dr. Ong’s research combines clinical epidemiology and machine learning methods to study disease epidemiology, health care systems, and the safety and effectiveness of therapeutic interventions. Her work has contributed to the advancement of data-driven methods for the study of a range of clinical problems. Her current research focuses on optimizing treatment of chronic diseases in children, preventing harms caused by diagnostic errors in frequently underdiagnosed or misdiagnosed diseases, and addressing disparities in health outcomes among underserved populations. For her work on diagnostic errors, she was selected as a scholar for the inaugural 2021-2022 National Academy Medicine Diagnostic Excellence Award.


Disease Progression of WHIM Syndrome in an International Cohort of 66 Pediatric and Adult Patients. (Pubmed Abstract)