Dr. Mangrum grew up in a US Navy family, living in Wales and Hawaii before her family came to reside in Virginia Beach in 1991. In 1997, she attended Old Dominion University, where she received a degree in Biology and Chemistry. She played an active role in the Honor Council at both Old Dominion University and Eastern Virginia Medical School, which she attended in 2001. Her volunteer work for children included student programs such as Coats for Kids and Haunted Hallway. In 2005, she was inducted into Alpha Omega Alpha and received the Etheridge-Shoaibi Scholarship.
She began her residency at Children's Hospital of the King's Daughters in 2005. During her time in residency, she lectured on asthma, child travel safety, and evaluating the sexually abused child. She read to children with REACH (Reading Enriches All Children), and spent time teaching young people about their diabetes at Camp Jordan in Williamsburg, Virginia. In 2008, she received the Rubio-Koehl Resident Teaching Award.
Dr. Mangrum recently joined the family at Renaissance Pediatrics in July 2008. Her special interests include child safety, literacy, and preventive healthcare. She enjoys music, reading, crafts and spending time with family. She lives in the Wards Corner district of Norfolk with her high school sweetheart, who she married in 2001.