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 joined Fresno Children’s Medical Group in 1983. 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.