Dr. Christian is board-certified in Internal Medicine, Pulmonary Diseases, Critical Care Medicine, and Critical Care Echocardiography. Additionally, he is board-eligible in sleep medicine having just completed his sleep medicine fellowship in the Division of Sleep Medicine at Harvard Medical School. Dr. Christian has a special interest in all aspects of sleep medicine, from insomnia to narcolepsy/hypersomnia to both central and obstructive sleep apnea. Dr. Christian is also eager to manage all aspects of pulmonary diseases including those with significant overlaps with sleep disorders such as Asthma, COPD, and obesity hypoventilation syndrome.