Dr. Runnfeldt is from Naples, Florida. She is a 1993 graduate of the University of Florida College of Veterinary Medicine. Dr. Runnfeldt has been an associate veterinarian at VCA All Animal Hospital of Orange Park since 1995. Her veterinary interests include soft tissue surgery and general practice.

Dr. Runnfeldt lives on Fleming Island with her husband, Hal, and son, Kyle. She has two dogs, CJ and Dory, Boomer the cat, and her horse, Chevis. Her personal interests include sailing and tennis.