Dr. Bergdahl is a native of Southern California. His undergraduate and graduate work was at University of California Irvine. He came to Fresno in 1980 for his pediatric residency at Valley Medical Center and Valley Children's Hospital, where he was chief resident in 1982-83. Dr. Bergdahl is a member of Valley Children's Pediatric Medical Group. He and his wife, Mary, have three adult children, Heather, Daniel and Stephen. He is also the grandparent of twins, Mack and Millie. Dr. Bergdahl's special interests include nutrition and complementary medicine.