Johnathan Schnee Fagg

Dr. Johnathan Fagg is a pulmonologist who specializes in diagnosing and treating conditions affecting the lungs and respiratory system. He earned his medical degree from the University of Iowa and brings nine years of experience to his practice. His expertise focuses on helping patients breathe better and manage complex lung conditions.

Dr. Fagg practices at Mercy Pulmonology in St. Louis, Missouri, where he treats patients with chronic lung disease and COPD with additional health complications. He helps patients who experience breathing problems through comprehensive care that includes pulmonary function testing to assess lung capacity and performance. Dr. Fagg also utilizes bronchodilator reversibility testing to determine how well certain medications can improve breathing function.