He obtained his baccalaureate in Astrophysics at the University of California at Berkeley and his MD degree from the University of California at Davis. He completed his internship in General Surgery and his residency in Otolaryngology - Head and Neck Surgery at UC Davis Medical Center. He was a fellow in Otology, Neurology, and Skull Base Surgery at the Michigan Ear Institute. Dr. Diaz currently serves as the Otolaryngology Residency Director at UC Davis Medical Center. His clinical practice is focused on otology, neurotology, and tumors of the lateral skull base. His research interests include electrophysiologic and molecular biologic mechanisms of inner ear potassium cycling and lateral wall transport processes in the regulation of the endocochlear potential, as well as novel methods of regeneration of the inner ear sensory epithelium.