Pulmonary Critical Care & Sleep Medicine Providers AppointmentsFill-out the Request an Appointment Form (or call the clinic); we will contact you to schedule an appointment with the right provider for your needs. If you prefer a specific provider from the list below, please let us know on the form or when you call. Pulmonary Critical Care PROVIDERS Atanasov, Strahil, MD Strahil Atanasov, MD Pulmonary & Sleep Medicine Boyars, Michael Michael Boyars, MD Pulmonary Calhoun, William William Calhoun, MD Pulmonary Cardenas, Victor Victor Cardenas, Jr, MD Pulmonary Duarte, Alexander Alexander Duarte, MD Pulmonary Gurski, Erin, RN, MSN, FNP-C Erin Gurski, RN, MSN, FNP-C Pulmonary & Sleep Medicine Jokhio, Shahzad Shahzad Jokhio, MD Pulmonary Nagan, Joseph Joseph Nagan, DO Pulmonary Nagan, Joseph Joseph Nagan, DO Pulmonary Nishi, Shawn Shawn Nishi, MD Pulmonary Shah, Shiwan, DO Shiwan Shah, DO Pulmonary Sharma, Gulshan Gulshan Sharma, MD, MPH, FCCP Pulmonary Zaidan, Mohammed Mohammed Fathi Zaidan, MD Pulmonary & Sleep Medicine Sleep Medicine PROVIDERS Atanasov, Strahil, MD Strahil Atanasov, MD Pulmonary & Sleep Medicine Gurski, Erin, RN, MSN, FNP-C Erin Gurski, RN, MSN, FNP-C Pulmonary & Sleep Medicine Sultana, Rizwana Rizwana Sultana, MD Sleep Medicine | Sleep Medicine - Pediatric Zaidan, Mohammed Mohammed Fathi Zaidan, MD Pulmonary & Sleep Medicine Skip Menu Navigate: Select to Navigate... - Pulmonary and Sleep Medicine - Sleep Lab -- Galveston Sleep Lab -- Webster Sleep Lab -- Angleton Danbury Sleep Lab - Interventional Pulmonology - Lung Cancer Screening - Meet the Team - Back to All Services Pulmonary and Sleep Medicine Sleep Lab Galveston Sleep Lab Webster Sleep Lab Angleton Danbury Sleep Lab Interventional Pulmonology Lung Cancer Screening Meet the Team Back to All Services Access MyChart Find a Location Make Appointment Department of... Department of Internal Medicine, Pulmonary The Division of Pulmonary Critical Care & Sleep Medicine is dedicated to the prevention and treatment of respiratory diseases. Our clinical mission is to provide comprehensive diagnosis and management for a broad range of respiratory diseases, to offer outstanding clinical care for patients with respiratory disorders, and to serve as a resource to regional physicians who share in the care of patients with respiratory diseases. Click to learn more.