Dr. Patrick Hsieh

Gabriel Zada, MD, MS, FAANS is Professor of Neurological Surgery at the Keck School of Medicine of the University of Southern California and a nationally recognized leader in brain tumor and skull base surgery. He serves as Surgical Director of the USC Brain Tumor Center, Co-Director of the USC Pituitary Center and Radiosurgery Center, and Vice Chair of Education for the Department of Neurosurgery. He is also Editor-in-Chief of Neurosurgical Focus, an international open-access journal of the Journal of Neurosurgery Publishing Group.Dr. Zada specializes in minimally invasive and endoscopic approaches to complex brain, pituitary, and skull base tumors and has performed more than 3,000 cranial operations during his career. His NIH-funded research program focuses on the genomics and epigenetics of brain and pituitary tumors, advancing precision medicine approaches in neurosurgical oncology.A prolific scholar, Dr. Zada has authored over 350 peer-reviewed publications and several textbooks in neurosurgery. Based on independent academic impact and expertise metrics, FindExpertMD ranks him the #1 neurosurgeon in California for multiple tumor (pituitary, meningioma) and skull base conditions and among the top neurosurgeons globally. Dr. Zada is highly rated in 49 conditions, according to our data. His clinical expertise encompasses Pituitary Tumor, Hypothalamic Tumor, Brain Tumor, Endoscopic Transnasal Transsphenoidal Surgery, and Gamma Knife Radiosurgery. Dr. Zada is board certified in American Board Of Neurological Surgeons.

Marvin Bergsneider is a Neurosurgery provider practicing medicine in Los Angeles, California. Dr. Bergsneider is highly rated in 39 conditions, according to our data. His clinical expertise encompasses Pituitary Tumor, Hypothalamic Tumor, Brain Tumor, Endoscopic Transnasal Transsphenoidal Surgery, and Balloon Sinuplasty.

Wouter Schievink is a Neurosurgery provider practicing medicine in Los Angeles, California. Dr. Schievink is highly rated in 24 conditions, according to our data. His clinical expertise encompasses Cerebrospinal Fluid Leak, Siderosis, Subdural Effusion, Laminectomy, and Awake Craniotomy.