Des Moines Orthopaedic Surgeons (DMOS) in Iowa has recently notified 307,864 current and former patients that some of their protected health information (PHI) was exposed in a cyberattack almost a year ago. DMOS explained that the incident occurred on or around February 17, 2023, and allowed an unauthorized third party to access and/or remove files containing the PHI of DMOS patients. DMOS said the breach was due to the failure of one of its vendors.