This article covers introductory concepts regarding Oriental medicine, its historical context, yin and yang principles, and Five-Phase theory. It discusses organ theory, patient examination, diagnosis, the meridian network system, and treatment modalities such as acupuncture and Chinese herbal medicine, giving a brief overview of the different acupuncture and Oriental medical styles practiced in the United States. Included also are helpful tables, graphs, and photographs to provide a better visual context for Oriental medicine.