
Dr. Alexandra Geanacopoulos is a clinician investigator and Instructor of Pediatrics in the Division of Emergency Medicine at Boston Children’s Hospital. In 2025, she completed a combined fellowship in pediatric emergency medicine and health services research, along with an MPH in Clinical Effectiveness at the Harvard T.H. Chan School of Public Health. Her research focuses on improving diagnostic decision-making through risk modeling, patient-centered care, and implementation science, with a particular emphasis on acute respiratory illness.
Dr. Geanacopoulos has led and contributed to studies on the diagnostic accuracy of chest radiography for pneumonia, clinician thresholds for pneumonia testing and treatment, missed opportunities for improved pneumonia diagnosis, and the impact of diagnostic uncertainty on clinician management and caregiver communication for children with acute respiratory illness. She has also developed and assisted in the development of novel risk prediction tools for pediatric musculoskeletal infections and serious bacterial infection in hypothermic infants. Her long-term goal is to advance data-driven, patient-centered approaches to guide diagnosis for children seeking emergency care.