Dr. John F Shield specializes in internal medicine in Sonora area. Dr. John F Shield has a medical practice at 690 Guzzi Lane, Suite A, Sonora CA, and has over 37 years of experience in the field of medicine. He graduated from Loma Linda University School Of Medicine with his medical degree in 1980. He is affiliated with numerous hospitals, including Sonora Regional Medical Center (CA) and more. Dr. Shield is accepting new patients at his medical office and practice location in Sonora, California. He is available for appointments, preventative care, medical care as well as ongoing patient care.