Dr. Lang has carried out a number of research projects, including studies of the epidemiology of urban asthma, drug allergy, anaphylaxis, and chronic urticaria. He has been active in national and regional medical organizations, and has published more than 100 articles in the medical literature. Dr. Lang was a member of the Joint Practice Parameters Task Force for the specialty of Allergy and Immunology (2001-2018), and served as Co-Chair of this Task Force (2016-2018). He also currently served as Chair of the National Quality Forum Pulmonary and Critical Care Standing Committee and as a member of the National Quality Partners Antibiotic Stewardship Action Team.