The occurrence of adverse events (AEs) is one of the most prevailing issues in the healthcare industry. Adverse events in hospitals are unintentional errors from clinical procedures or clinical decisions that can lead to serious complications or even death of a patient. There are several contributing factors to AEs which may include patient safety culture among medical practitioners, work environment, and technology, among others. The study aims to develop a framework that evaluates and prioritizes the factors contributing to adverse events in the Philippine hospitals. The Fuzzy Analytic Hierarchy Process (FAHP) is used to establish the contributory factors and sub-factors in the occurrence of adverse events. The results show that technology, with a rating of 19.32%, is the main factor that should be prioritized by hospitals in the Philippines followed by institutional context and workforce condition with ratings of 15.95% and 15.11%, respectively. Experts from both private and public hospitals are considered in the study. Findings show that there is only minimal differences on the responses from both set of experts. For instance, institutional context ranks second on the first set of experts whereas on the second set of experts, it ranks last.