Dr. William G. Loudon and team will treat your child as we would treat our own. We work with families to provide the best care for your loved. Give us a call at (714) 677-9463 to speak with our office to answer any billing or insurance questions.

For more than 25 years, Dr. William Loudon has provided comprehensive neurosurgical care to children and adults throughout Southern California. His philosophy of care extends beyond treating neurological disease alone—it is centered on caring for the whole person and supporting patients and their families through every stage of their medical journey. Dr. Loudon believes that exceptional neurosurgical care combines technical excellence with compassion, clear communication, and an enduring physician–patient relationship.
Dr. Loudon's unique background reflects a non-traditional 21-year academic pathway that includes medical training at the University of Texas Health Science Center at Houston, graduate training culminating in a PhD in Tumor Biology at The University of Texas MD Anderson Cancer Center, a research fellowship at the National Institute of Neurological Disorders and Stroke (NINDS) in Bethesda, Maryland, neurosurgical residency training at the Medical College of Virginia, and fellowship training in Pediatric Neurosurgery at the Children's Hospital of Philadelphia (CHOP).
Today, his practice blends this depth of academic expertise with the accessibility and personalized attention of private practice. He is committed to providing longitudinal, physician-led care that emphasizes thoughtful clinical judgment, multidisciplinary collaboration, and compassionate guidance for patients facing both routine and highly complex neurological conditions. Whether caring for a child with a congenital disorder, an adult with a brain or spine tumor, or a family navigating a life-altering diagnosis, Dr. Loudon strives to ensure that every patient feels heard, supported, and cared for with dignity, empathy, and unwavering commitment.
Dr. Loudon maintains surgical and hospital privileges at:
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