Quest Diagnostics today disclosed that roughly 11.9 million patients who sought medical testing through its clinical labs may be affected by the breach of a third-party bill collection agency.

The compromised records include personally identifying information such as financial data and Social Security numbers, as well as medical information, but not lab test results.

In a company press release, Quest says it was first informed of the security incident on May 14 by American Medical Collection Agency (AMCA), which provides its services to Quest contractor Optum360. The lab operator says it received updated information, including the number of affected patients accounts, on May 31 of this year.

Please register to continue.

Already registered? Log in.

Once you register, you'll receive:

  • News analysis

    The context and insight you need to stay abreast of the most important developments in cybersecurity. CISO and practitioner perspectives; strategy and tactics; solutions and innovation; policy and regulation.

  • Archives

    Unlimited access to nearly 20 years of SC Media industry analysis and news-you-can-use.

  • Daily Newswire

    SC Media’s essential morning briefing for cybersecurity professionals.

  • Learning Express

    One-click access to our extensive program of virtual events, with convenient calendar reminders and ability to earn CISSP credits.