In an 8-K filed early on Oct 22, Quest Diagnostics said it learned on Oct 21 of unauthorized access to its Quanum LSM system, which some clients use to place test orders and to receive and look up results. Quest says it believes an unauthorized party accessed certain patient records; the full scope is still under investigation. It has notified federal law enforcement, brought in outside incident responders, and says operations and patient service weren't materially disrupted. Quest hasn't said how the attacker got in or how many people are affected.

If you're a Quest client: review which of your staff accounts use Quanum LSM, reset those credentials, check recent result look-ups for anything unusual, and expect follow-up from Quest about notification duties under HIPAA.