Dr. Ryan Chang is a specialist in pulmonology based in San Francisco, California. He works at Kaiser Permanente San Francisco Medical Center and got his diploma from George Washington University School of Medicine. He did his residency in internal medicine at Cedars-Sinai Medical Center and a fellowship in pulmonary disease and critical care medicine at UCLA Medical Center. The doctor is certified in critical care medicine and pulmonary disease and has an experience of more than 20 years.