Joseph’s Hospital and Medical Center in Phoenix. Dr. Tumialán is board certified by the American Board of Neurological Surgery. Dr. Tumialán received his medical degree from Georgetown University School of Medicine in Washington, D.C. He completed his residency at Emory University School of Medicine in Atlanta and served on active duty with the United States Navy as a neurosurgeon. Dr. Tumialán’s expertise includes minimally invasive spine surgery and cervical and lumbar arthroplasty.