FRIDAY, OCTOBER 23, 2026|No. 19835
Technology · Healthcare · Security

Quest Diagnostics reports unauthorized access to patient data system

Quest Diagnostics has initiated an investigation after discovering unauthorized access to its Quanum Lab Services Manager platform, impacting certain patient records.

Quest Diagnostics has launched an investigation into unauthorized access of its patient data management platform.
Quest Diagnostics has launched an investigation into unauthorized access of its patient data management platform.
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US medical lab operator reports cyber breach affecting 'certain patient records'

CHICAGO: US medical laboratory operator Quest Diagnostics said it learned of a cyber breach of one of its systems this week, likely compromising some records for patients.

In a Thursday (Oct 22) regulatory filing, Quest Diagnostics reported "unauthorised access” to its Quanum Lab Services Manager, a platform where certain clients can place test orders and receive or look up their results. The company said it discovered the hack on Oct 21 and notified US federal law enforcement.

How many patients and which particular records have been affected is still unknown. Quest Diagnostics said it believes "certain patient records” were accessed in the breach, but that the full scope remains under investigation.

The New Jersey-based company said it's also working with external cybersecurity experts to assist in its response.

Quest Diagnostics has seen hacks impacting patient records before. In 2016, for example, the company said data including lab results and contact information of about 34,000 people was exposed in another online breach. And in 2019, other personal information belonging to about 11.9 million Quest patients was affected after a separate hack at American Medical Collection Agency, a billing collections service provider.

Cyberattacks are on the rise across industries. Beyond healthcare, other breaches have recently disrupted anything from supermarket chains to core education applications.

Governments and companies worldwide are working more broadly on online security updates. Urgency erupted this week after an AI-assisted discovery of vulnerabilities in a programming language called PHP, which is vital to 70% of websites globally.

Outages and limited service have continued for many as firms rush to patch those risks. But based on the company's investigation, Quest Diagnostics confirmed to The Associated Press on Oct 22 that its cyber breach was not related to the PHP issue. – AP

PAN's pipeline reviewed approximately 1 open sources for this article. No human editor reviewed this article before publication.

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