A group medical practice in Reston, Pulmonary & Critical Care Associates treats lung and breathing illnesses. The office also has a dedicated sleep diagnostic center to identify cases of sleep apnea. Doctors include Dr. Douglas Rennert, M.D., Dr. Vas Devan, M.D., Dr. Jahan Naghshin, Dr. Mrunalini Chakurkar, M.D., and Dr. Petra Thomas, M.D. Call for an appointment.