Dr. Mamoun Najjar is board certified in pulmonary disease, internal medicine, and critical care medicine, as well as a sleep specialist. He received his medical degree from the Jordan University of Science and Technology Faculty of Medicine and completed his residency at Nassau University Medical Center. A fellowship program at North Shore-Long Island Jewish Health System followed. With a career in medicine of approximately 20 years, Dr. Najjar has also contributed to several publications. At the time, he is affiliated with Crestwood Medical Center and Decatur Morgan Hospital in Alabama.