Nearly 12 Million Quest Diagnostics Patients’ Medical Info Exposed in New Data Breach of Third-Party Vendor, American Medical Collection Agency

According to reports, on May 31, 2019, Quest Diagnostics announced that an unauthorized user had access to the personal information of approximately 11.9 million patients through a third-party billing collections vendor. File photo: Pixabay.

PALM BEACH – Another day, another security disaster. According to reports, patient records including Social Security numbers, medical and financial information may have been accessed in a data security incident involving clinical laboratory Quest Diagnostics.

According to reports, on May 31, 2019, Quest Diagnostics announced that an unauthorized user had access to the personal information of approximately 11.9 million patients through a third-party billing collections vendor. The unauthorized access occurred between August 1, 2018 and March 30, 2019.

The patients’ personal information that the unauthorized user potentially had access to included:

  • Social Security numbers
  • Certain financial data
  • Medical information
A screenshot of the news release published by Quest Diagnostics on its website.

Quest Diagnostics is one of the largest blood testing providers in the country. While customers’ broad medical information could have been compromised, Quest said actual lab test result data was not impacted.

Since learning of the incident, Quest has suspended sending collection requests to American Medical Collection Agency (AMCA), the third-party billing collections vendor.

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