Dr. Costalez attended the University of Missouri-Kansas City School of Medicine and subsequently trained at Children's Mercy Hospitals and Clinics for residency. She honors Humana HMO, Humana Bronze, and Humana Catastrophic, in addition to other insurance carriers. Her hospital/clinic affiliations include Washington University Physicians, Children's Mercy (Kansas City and Overland Park, KS; Independence and Kansas City, MO), and St. Louis Children's Hospital.