Diagnosis-related group (DRG) is a way of grouping together patients who have been diagnosed with the same or similar health problems. This helps health care providers see how many patients they have with certain conditions, and it helps them plan the best way to give care. It also helps them understand which types of treatments or tests might work best for certain groups of patients. For example, a hospital might have a lot of patients with chest pain. All these patients could be grouped together under the “Chest Pain” DRG and the hospital could then plan which treatments they should focus on giving to these patients.