Dr. Guillermo Castillo specializes in family practice in San Diego area. Dr. Guillermo Castillo, MD has a medical practice at 5550 University Avenue, San Diego CA, and has over 16 years of experience in the field of medicine. He graduated from University Of Southern California School Of Medicine with his medical degree in 2001. He is affiliated with numerous hospitals, including Sharp Chula Vista Medical Center (CA) and more. Dr. Castillo is accepting new patients at his medical office and practice location in San Diego, California. He is available for appointments, preventative care, medical care as well as ongoing patient care.