These areas are among his clinical interests: salivary gland cancer, salivary stone, and hyperparathyroidism. Dr. Ryan is an in-network provider for several insurance carriers, including Anthem, Blue Cross/Blue Shield, and Blue Shield. After attending Stanford University School of Medicine, he completed his residency training at Stanford University Medical Center. He is professionally affiliated with the University of California San Francisco (UCSF) Medical Center and San Francisco VA Medical Center (SFVAMC).