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  • William O'Brien, DO, FAOCR

    Dr. William O'Brien Sr. is a board-certified neuroradiologist and serves as Chief of Pediatric Neuroradiology at Orlando Health Arnold Palmer Hospital for Children. His expertise covers all aspects of pediatric neuroimaging with a particular focus on head and neck pathology in children. His experience includes:

  • Ernest R. Jermin, MD

    Dr. Ernest Jermin is a board-certified psychiatrist at Orlando Health Children's Neuroscience Institute Behavioral Health and Development specializing in pediatric and adolescent psychiatry. His expertise includes:

  • Erin R. Greenup, DO

    Erin Greenup, DO, is a board-certified pediatric endocrinologist at the Orlando Health Arnold Palmer Hospital for Children Endocrinology and Diabetes Center. She specializes in endocrinology, providing diagnosis and treatment for children and adolescents with hormonal and metabolic conditions of varying severity.

  • Emily Ulloa, PA-C

    Emily Ulloa, MS, PA-C, is a pediatric surgical physician assistant at Orlando Health Arnold Palmer Hospital for Children. She provides assessment and care management for neonatal intensive care unit (NICU) and inpatient pediatric patients throughout their surgical experience. She also manages the hospital’s outpatient burn clinic.

  • Emma Prosser, MSN, APRN, FNP-C

    Emma Prosser is a certified family nurse practitioner (FNP-C) with the Orlando Health Complex Care Program. She provides pediatric primary care for young patients with special healthcare needs and her experience includes:

  • Elise Riddle, MD, FAAP, FACC

    Elise Riddle, MD, FAAP, FACC, practices congenital cardiology as a board-certified pediatric cardiologist at Orlando Health Children Heart Institute.

  • Elizabeth Carreno Rijo, MD

    Elizabeth Carreño Rijo, MD, MPH, is a board-certified adolescent medicine physician with Orlando Health Arnold Palmer Hospital for Children. She cares for children between the ages of 11 and 25 and helps them transition from pediatric to adult care. Dr. Carreño Rijo has a particular interest in reproductive health, eating disorders and promoting healthy decision-making and positive lifestyle choices.

  • Estefania Rodriguez, MD, FAAP

    Dr. Estefania Rodriguez is a board-certified pediatrician and fellowship-trained pediatric nephrologist with the Hewell Kids’ Kidney Center at Orlando Health Arnold Palmer Hospital for Children. She diagnoses and treats diseases of the kidney in young patients, and her interests include:

  • Andrew G. Summers, MD

    Andrew Summers, MD, is a board-certified pediatrician with Orlando Health Physician Associates. Dr. Summers specializes in providing comprehensive care — from the assessment of childhood development to the treatment of common and complex illnesses — for newborns, children and adolescents.

  • Angela Zimmerman, APRN

    Angela Zimmerman is a board-certified pediatric nurse practitioner in acute care (CPNP-AC) with the Orlando Health Children's Neuroscience Institute Neurosurgery, supported by the Leon Pediatric Neuroscience Fund. She manages neurosurgical pediatric patients in the hospital and outpatient settings. She also assists in the operating room and cares for pediatric patients in intensive care, neonatal intensive care (NICU) and less-acute care units.