Pulmonary medicine (pulmonology) focuses on the respiratory system, which helps you to breathe. Alex E Fijman, MD is a board-certified physician, specializing in . With an office conveniently located in Ossining, NY, Dr. Fijman is dedicated to help diagnose, treat and manage disorders affecting your lungs and other parts of the respiratory system, such as the upper airways, thoracic cavity and chest wall. At Optum, our board-certified pulmonologists have experience working with patients who suffer from obesity, hypertension, asthma, sleep apnea and other sleep disorders, as well as those who want to quit smoking. Optum accepts most major health plans.