Healthcare diagnostics company Centers Laboratory (Centers Lab NJ LLC) has informed the US government that a data breach discovered nearly one year ago affects more than 540,000 individuals.
According to a data breach notice posted on its website, the New Jersey-based provider of testing and laboratory services for healthcare organizations discovered an intrusion in its IT environment in August 2025.
An investigation showed that threat actors had gained “limited access” to Centers Laboratory systems between August 9 and August 14, exfiltrating personal and protected health information, including names, dates of birth, SSNs, driver’s license or state identification numbers, passport numbers, and health insurance and medical information.
The healthcare data breach tracker maintained by the Department of Health and Human Services revealed last week that the data breach affects 542,377 individuals.
Centers Lab was targeted by the WorldLeaks cybercrime group, which listed the organization on its website in October 2025.
The hackers leaked more than 1.6 million files totaling 720 GB, allegedly stolen from Centers Lab systems.
WorldLeaks, which made headlines for targeting major companies such as Nike and Dell, emerged in 2025 following the shutdown of the Hunters International ransomware group.
Following the transition to WorldLeaks, the cybercriminals stopped using file-encrypting malware and have focused on data theft and extortion. More than 170 organizations are listed on the group’s website at the time of writing.
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