Dr. Stephen Nathan graduated the medical school from the University of Arizona College of Medicine – Tucson and did his internship at the Charity Hospital Tulane. He completed both his residency and fellowship program at the University of Arizona. Dr. Nathan is specialized in pulmonology and is board certified in internal medicine and pulmonary disease. He has been in practice for more than 20 years and is affiliated with several hospitals, including the Paradise Valley Hospital and John C. Lincoln North Mountain Hospital.