Our Division of Nephrology is always adding to our team to meet the growing and changing needs of our patients. We’re very pleased to introduce three new fellows and two new physicians to our expert team. The addition of these specialists further strengthens our commitment to providing the highest level of quality and personalized nephrology care for our patients and their families.
First-Year Fellows
Charles Anderson, MD - Dr. Anderson attended Saint Louis University School of Medicine and completed his pediatrics residency at Carolinas Medical Center. His favorite thing about CHOP is seeing patients from many different backgrounds and geographical areas and using CHOP’s resources to care for them. Dr. Anderson says, “Working at CHOP is so fulfilling, and I wouldn’t want to be anywhere else!”
Sonya Kowalczyk, MD - Dr. Kowalczyk attended Chapel Hill School of Medicine at the University of North Carolina and completed her pediatrics residency at CHOP. Her favorite thing about Philadelphia is the friendly people, and the endless amount of fun outdoor events and pop-ups happening around the city!
Ajan Sivaramamoorthy, MD - Dr. Sivaramamoorthy attended Robert Wood Johnson Medical School of Rutgers University and completed his pediatrics residency at the University of North Carolina. Dr. Sivaramamoorthy’s favorite things about Philadelphia are the museums and all of the amazing places to eat.
Lisa Guay-Woodford, MD, Attending Nephrologist
Dr. Guay-Woodford, MD, is Senior Advisor for Clinical and Translational Research Initiatives and an attending physician at Children’s Hospital of Philadelphia in the Divisions of Nephrology and Human Genetics. Dr. Guay-Woodford directs the newly created Inherited Kidney Diseases Program, which spans the Division of Nephrology and the Division of Human Genetics. She is an internationally recognized pediatric nephrologist with a research program focused on identifying clinical and genetic factors involved in the pathogenesis of inherited renal disorders, most notably autosomal recessive polycystic kidney disease (ARPKD). Her laboratory has identified the disease-causing genes in several experimental models of recessive polycystic kidney disease, and her group participated in the identification of the human ARPKD gene as part of an international consortium. In addition, her laboratory was the first to identify a candidate modifier gene for recessive polycystic kidney disease. For her contributions to the field, she received the Lillian Jean Kaplan International Prize for Advancement in the Understanding of Polycystic Kidney Disease, given by the Polycystic Kidney Disease Foundation and the International Society of Nephrology.
Dayna Mazza, MD, Attending Nephrologist
Dr. Mazza is an attending physician. She completed medical school at the University of Maryland School of Medicine, and a residency in pediatrics at Sidney Kimmel Medical College at Thomas Jefferson University/DuPont Hospital for Children. She completed her pediatric nephrology fellowship at CHOP in June 2023, and has stayed on here as an attending physician. Dr. Mazza sees patients in the Buerger Center for Advanced Pediatric Care on CHOP’s Philadelphia Campus and Princeton at Plainsboro. Her clinical and research interests are in nephrotic syndrome, acute kidney injury (AKI), vaccine preventable illnesses in high-risk nephrology patients, and quality improvement.