Pulmonary Medicine is the medical area of expertise dealing with diseases related to the breathing tract and lungs. Pulmonology is taken into consideration by a department of internal medicine and is associated with intensive care medicine. Pulmonary Medicine, Critical Care Medicine, and Sleep Medicine specialize in the diagnosis and treatment of patients with diseases that have an effect on the lungs, respiration, and sleep. A Pulmonologist is a medical doctor who specializes in treating problems associated with the lungs and breathing system. Pulmonologists also are called chest disorder specialists, breathing specialists, chest physicians.