Dr. Alexander Ong Sy, MD

Dr. Alexander Sy is a pulmonologist who specializes in critical care medicine and internal medicine, bringing four decades of medical experience to patient care. He earned his medical degree from the University of the Philippines Manila College of Medicine and completed his residency training at St. Agnes Hospital in Baltimore. His extensive background spans the comprehensive treatment of lung conditions and the intensive care of critically ill patients.

Dr. Sy practices at Jerry L Pettis Memorial VA Medical Center in Loma Linda, California, and maintains an affiliation with Duke Raleigh Hospital. He focuses on treating various forms of sleep apnea, including obstructive sleep apnea and sleep breathing disorders in children. His clinical expertise includes performing at-home sleep studies and polysomnograms to diagnose sleep-related breathing conditions. Patients have given him an average rating of 3.0 on Vitals.