Dan Doyle, MD is a now retired former Chief of the Division of Endocrinology at the Nemours Children's Hospital in the DV.  He graduated from Hahnemann University (now Drexel University) School of Medicine in 1990, completed Pediatric Residency at TJU/Nemours in 1993 and a Pediatric Endocrinology Fellowship at Saint Christopher's Hospital for Children in 1996.  He then spent 4 years at Temple as a Pediatrician before coming to Nemours in October of 2000.  He became Chief of Endocrinology in September of 2013 until 2 months prior to retirement in April of 2026.  His areas of interest have included disorders of puberty, growth and thyroid dysfunction.