Elizabeth Marie Brennan, MD

Dr. Walker is the Medical Director of the Neonatal Follow-Up Program at Johns Hopkins All Children’s Hospital. He also sees patients as a Newborn Hospitalist at Orlando Health Bayfront Hospital Center for Women and Babies, and as a Pediatric Urgent Care physician in the Emergency Center. He joined the Johns Hopkins All Children’s Hospital staff in 2017. He previously worked as a Medical Director and Neonatal Hospitalist at Ascension Borgess Medical Center in Kalamazoo, Michigan. His professional areas of interest include child maltreatment, traveler's health, physician leadership and management, as well as quality improvement. Dr. Walker earned his Medical Degree at Poznan University of Health Sciences in Poznan, Poland, and his MBA at Regis University in Denver, Colorado.

Dr. Chrisochos is a pediatric emergency physician at Johns Hopkins All Children’s Hospital. She joined the hospital staff in 2016.Dr. Chrisochos earned her medical degree at Nova Southeastern University and completed her pediatric residency at the University of South Florida Morsani College of Medicine. Before joining Johns Hopkins All Children’s, she was an attending physician at two Children’s Healthcare of Atlanta Emergency Departments and an assistant professor of pediatrics at Emory University.She is conversational in medical Spanish and skilled at written Greek.

Bayfront Health St. Petersburg is a 480-bed private teaching hospital that is also one of the states busiest accredited Adult-Pediatric Trauma Centers.