Dr. Jonathan Singer is an Associate Professor of Medicine in the Division of Pulmonary, Critical Care, Allergy and Sleep Medicine. He serves as an attending physician in the Lung Transplant Program, where he cares for patients with advanced lung disease and lung transplant recipients. Dr. Singer received his undergraduate degree from Stanford University. He completed a combined Masters in Health and Medical Sciences from the School of Public Health at UC Berkeley and a medical degree at UCSF as part of the Joint Medical Program. He remained at UCSF, where he completed a residency in Internal Medicine, and fellowships in Pulmonary, Critical Care Medicine, and Lung/Heart-Lung Transplantation. He is board certified in Pulmonary Medicine and Critical Care Medicine. He is a member of the American Thoracic Society and the International Society for Heart and Lung transplantation.

At UCSF, Dr. Singer is the Associate Medical Director of the Advanced Lung Disease and Lung Transplant clinical program and is also the Director the Advanced Lung Disease and Lung Transplant Research Program. The latter is a cross-Departmental group of investigators focused on clinical outcomes, translational, and basic research aimed at addressing the fields' most pressing needs. He is a core investigator with the UCSF Respiratory Epidemiology Group and has served as Chair of the International Society of Heart and Lung Transplantation Pulmonary Council Quality of Life Workforce since 2012.

Dr. Singer's specific research is focused on three themes: 1) Patient centered outcomes, including functioning, disability, health-related quality of life, and survival; 2) Improving transplant candidate risk stratification by investigating physical frailty and body composition; and 3) Developing and validating novel surveys and measures of frailty for use in advanced lung disease and lung transplantation.