Faculty & Staff Directory Home / For Providers & Researchers / Take Action / Faculty & Staff Directory / Stefan Koester, MD Stefan Koester, MD Neurosurgery Resident PGY-1 Current Program: Neurosurgery Residency Start Year: 2024 Medical School: Vanderbilt University Undergraduate: University of Arizona Stefan Koester, MD Neurosurgery Resident PGY-1 Current Program: Neurosurgery Residency Start Year: 2024 Medical School: Vanderbilt University Undergraduate: University of Arizona