A pulmonologist is a medical doctor who specializes in diagnosing and treating diseases of the lungs and respiratory system. They help patients with conditions like asthma, chronic obstructive pulmonary disease (COPD), and pneumonia. By using various tests and procedures, a pulmonologist can assess lung function and determine the best treatment options. These specialists often work closely with other healthcare professionals, such as primary care physicians and respiratory therapists, to provide comprehensive care. They may also conduct research to improve treatments for lung diseases and educate patients on how to maintain healthy lungs.