This document provides an overview of the field of health informatics through a presentation given by Nawanan Theera-Ampornpunt. It defines health informatics as the science of optimal information use, often with technology, to improve individual health, healthcare, public health, and biomedical research. The document discusses the scope of health informatics, relevant definitions, examples of data to wisdom in patient cases, common areas of interest, roles and training levels in the field, and resources for additional information.