Dr. Quezada is an Assistant Professor of Clinical Medicine in the Division of Pulmonary, Allergy, and Critical Care Medicine. A native of Washington Heights, he received his Sc.B. with Honors in Biology from Brown University in Providence, Rhode Island, and his medical degree from Columbia University College of Physicians and Surgeons. He completed residency training in Internal Medicine, and Fellowship in Pulmonary and Critical Care Medicine, at Columbia University Medical Center, serving as Chief Fellow on his last year of fellowship training. He is board-certified in Internal Medicine and Pulmonary Disease by the American Board of Internal Medicine. Dr. Quezada specializes in providing excellent care of patients suffering from lung disease, including patients with asthma, COPD, and interstitial lung disease. He also has special interest in smoking cessation and interventional bronchoscopy. His research interests include smoking cessation, COPD and asthma, serving as a co-primary investigator in a multicenter NIH-sponsored clinical trial. He has also performed research looking into the relationship between sensitization and exposure to indoor allergens in asthma patients residing in inner city neighborhoods, and the development of tools to help identify patients with early COPD.