This is an introduction into the Occupational Medicine for DCs. Occupational Medicine is defined as medical services not for illness or disease, but for prevention of illness and disease to occupational exposures like loud noise, dust/fumes, chemicals, heavy metals, drugs, alcohol, and physical exertional exposures. DOT physicals are a small part of Occupational Medicine. There are 25 or more diagnostic services which companies are either mandated by government to do, or they are utilized by companies to prevent work comp injuries.