Our Pediatric Neurosurgery Team

Physicians

Michael Edwards, MD, is the Chief, Division of Pediatric Neurosurgery at Lucile Packard Children's Hospital, the Lucile Packard Children's Hospital Professor in Pediatric Neurosurgery, and Co-Director of the Center for Children's Brain Tumors. He is also a professor of neurosurgery and pediatrics at the Stanford University School of Medicine. He is a board-certified neurosurgeon and holds a fellowship in pediatric neurosurgery and neuro-oncology from the University of California, San Francisco, Department of Neurosurgery. His practice includes a wide range of neurosurgical procedures and treatments, including radiosurgery. Dr. Edwards presently sits on the editorial board of the Journal of Radiosurgery and Surgical Neurology. 
 
Raphael Guzman, MD, is a pediatric neurosurgeon at Lucile Packard Children's hospital and  an assistant professor of neurosurgery at the Stanford University School of Medicine. Dr. Guzman is a European board certified neurosurgeon trained in Switzerland. He holds a fellowship in cerebrovascular and pediatric neurosurgery from Stanford University and the children's hospital Necker in France. His practice includes a wide range of neurosurgical procedures and treatments, including vascular pathologies, brain tumors, chiari malformation, craniosynostosis, hydrocephalus and spinal dysraphism. Dr Guzman’s research interest focus on cerebrovascular diseases including moyamoya disease, AVM and experimental stem cell therapy for stroke.

Nurse Practitioners

Melissa Ballard, RN, ACNP, is a neurosurgery pediatric nurse practitioner (PNP) specializing in the care of hospitalized children with an emphasis in the transition from intensive to acute care, end-of-life care and all acute care settings. She received a Bachelor of Science in Nursing from San Francisco State University in 1985 and a Master of Science in Acute Care Pediatric Nurse Practioner from San Francisco University in 2007.
Jodette C. Carrillo, RN, MS, CNS, PNP, is a pediatric nurse practitioner and provides inpatient and outpatient care for children and their families. She has been with Stanford/Lucile Packard Children's Hospital since 1997 and has extensive experience in pediatric critical care. She completed her undergraduate degree at the University of San Francisco and proceeded to attain her Masters in Science degree at the University of California, San Francisco. Jodette is dual titled as a Clinical Nurse Specialist and Pediatric Nurse Practitioner. Additionally, Jodette is a member of NAPNAP and Sigma Theta Tau International.
Elizabeth A. Colglazier, RN, CPNP, is a pediatric nurse practitioner with extensive experience working with pediatric intensive care patients. Elizabeth received her Bachelor of Science in Nursing from the University of Virginia and a Master of Science in the Acute Care Pediatric Nurse Practitioner Program from University of California, San Francisco. Elizabeth is a member of Sigma Theta Tau International.
Bonnie Taft, RN, MSN, CPNP, is a certified pediatric nurse practitioner (PNP) with a rich background in pediatric primary care setting. Bonnie is also an experienced educator and served as a member of the pediatric clinical faculty at the University of California at San Francisco for several years. Bonnie completed her undergraduate degree at State University of New York at Stony Brook in 1994 and she later went on to attain her Masters in Science degree at Boston College in 2003.