Quest is the latest in a series of healthcare technology companies that have been hacked in recent months. Get your pass and bring someone with you at 50% off. Image Credits:Daniel Acker / Bloomberg / Getty Images Security Lab testing giant Quest Diagnostics confirms patients’ personal and health data was compromised during breach Zack Whittaker 8:00 AM PDT · October 23, 2026 Medical lab testing giant Quest Diagnostics has confirmed a cyberattack.