Leadership

Program Director

Jonathan Cheah, MBBS, CCD, FACP, commenced as program director for the UMass Chan Rheumatology Fellowship program in August 2025. He graduated from University College London with initial post-graduate training in the United Kingdom before moving to the United States in 2013. Following residency training in Internal Medicine at Montefiore Medical Center/Albert Einstein College of Medicine, Bronx, NY, and fellowship training in Rheumatology at Hospital for Special Surgery/Weill Cornell Medicine, New York, NY, Jonathan joined the Division of Rheumatology at UMass Chan Medical School and UMass Memorial Health in 2019. While retaining an active practice in general rheumatology, his clinical interest focuses on osteoporosis. Jonathan holds a Post-Graduate Certificate in Medical Education from the University of Warwick, United Kingdom, has contributed questions to the ACR CARE program, served a three-year term on the ACR/NBME In-Training Exam Committee, and was previously co-lead for the UMass Chan pre-clerkship musculoskeletal curriculum.

Associate Program Director

Peggy Wu, MD, became the associate program director of the Rheumatology Fellowship Program in 2022. Dr. Wu has been involved with the fellowship program for many years through precepting clinic as well as the clinical competency and program evaluation committees. Prior to joining UMass Chan, she completed medical school and residency at Rush University Medical Center, followed by a three-year Rheumatology fellowship at Northwestern University. At Northwestern, she focused her research on systemic lupus erythematosus. She then worked in private practice for three years in Pittsburgh, Pennsylvania, after fellowship followed by a move to Massachusetts in 2012 where she currently is an associate professor of medicine at UMass Chan Medical School. She has also been very involved in undergraduate medical education, serving as a prior course director for the longitudinal preceptor program and the Medical School’s physical diagnosis course for four years. She currently serves as a learning community mentor, where she supports a cohort of students as an advisor and teacher. In addition to her clinical work, she enjoys spending time with her husband and daughter, hiking, knitting, reading, and cooking.