Douglas Rennert, M.D., F.C.C.P.

Dr. Rennert received his undergraduate education at Haverford College in Pennsylvania. Subsequently, he attended Columbia University College of Physicians & Surgeons. Postgraduate training was completed at St. Luke's Hospital in New York in Internal Medicine. He successfully fulfilled his Pulmonary and Critical Care Fellowship at Bellevue Hospital/New York University Medical Center. Dr. Rennert is Board Certified in Internal Medicine, Pulmonary Medicine, and Critical Care Medicine. He is a Fellow of the American College of Chest Physicians. He is also a member of the American Thoracic Society, Society of Critical Care Medicine, American Academy of Sleep Medicine, and the Medical Society of Virginia. Currently, he is Director of Respiratory Therapy and Director of Critical Care Medicine at HCA Reston Hospital Center. Dr. Rennert co-founded the Northern Virginia Thoracic and Esophageal Disorders Center at the same institution. U.S. News has named Dr. Rennert as one of America's Top Pulmonologists. Similarly, Dr. Rennert has been honored by the Washingtonian Magazine, Washington Consumer's Checkbook, and Northern Virginia Magazine as a Top Doctor. Dr. Rennert is happily married and has three wonderful children.

Vas Devan, M.D., F.A.C.P., F.C.C.P.

Dr. Devan attended the University of Delhi in India for undergraduate school as well as medical school. His postgraduate education consisted of an internship at Kingsbrook Jewish Medical Center in New York, a residency at Genesee Hospital at the University of Rochester, and a pulmonary and critical care fellowship at Nassau County Medical Center on Long Island. Dr. Devan was appointed a clinical assistant professor at the State University of New York in Stony Brook through 1993. He is a Fellow of both the American College of Chest Physicians as well as the American College of Physicians. Dr. Devan is a member of the American Thoracic Society, American Academy of Sleep Medicine, and the Virginia Medical Society. He is board certified in Internal Medicine, Pulmonary Medicine, Critical Care Medicine, and Sleep Medicine. Dr. Devan has held directorships in Respiratory Therapy and in Critical Care Medicine in several hospitals in New York and Virginia. He was named a Top Doctor by the Washingtonian Magazine in 2008 and again in 2010. Dr, Devan is an avid horseman and frequently volunteers as the physician in residence at local equestrian events.

Jahan Naghshin, M.D., M.Sc., F.C.C.P.

Dr. Naghshin attended medical school at Isfahan University of Medical Sciences in Iran. He completed a Masters Degree in Pulmonary Medicine at the University of British Columbia in Vancouver, Canada. Subsequently, Dr. Naghshin finished an internal medicine residency at Temple University Hospital in Philadelphia, PA. He then completed a Pulmonary and Critical Care fellowship at the University of Pittsburgh Medical Center in Pittsburgh PA and then an additional Sleep Medicine fellowship at the same University. He has first authored multiple peer-reviewed publications and a chapter in Sleep Medicine Clinics. Dr. Naghshin is quadruple board certified in Internal Medicine, Pulmonary Medicine, Sleep Medicine, and Critical Care Medicine. Dr. Naghshin is a Fellow of the American College of Chest Physicians and holds memberships in the American Thoracic Society, the American Academy of Sleep Medicine, and the Virginia Medical Society. He is happily married and has a son.

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