Dr. Cohen is a specialist in Pulmonary and Critical care Medicine. She is the founding director of the Johns Hopkins Center for Nontuberculous Mycobacteria and Bronchiectasis. She is an expert in the care of patients with NTM pulmonary disease, bronchiectasis, and in the care of critically ill patients in the ICU. Her research is dedicated to improving the diagnosis and treatment of mycobacterial diseases and bronchiectasis. She provides teaching to medical students, residents and fellows at Johns Hopkins.