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Regulator-posted notice

Breach notice filed by Quest Diagnostics (December 2016)

Organization named: Quest Diagnostics Incorporated Provisional: identity as filed, not yet matched to the directory
Type as the source lists it: Hacking/IT Incident

What the sources say

HHS OCR breach portal (HIPAA breaches affecting 500 or more individuals) Primary notice

Posted on the HHS OCR breach portal (HIPAA breaches affecting 500 or more individuals) with a submission date of Dec. 12, 2016.

Organization as reported
Quest Diagnostics, NJ
Entity type as reported
Healthcare Provider
Category as reported
Hacking/IT Incident
Location of information as reported
Network Server
Submission date
Dec. 12, 2016
Observed by BreachRecords
2026-10-18 16:15 UTC (revision 14332, row:5471)
Archived copy
Held in the private archive (provenance)

The covered entity (CE), Quest Diagnostics, reported that it was the victim of a cyber-attack that affected the electronic protected health information (ePHI) of 34,055 individuals. The ePHI involved included names, dates of birth, telephone numbers, and lab results. The CE notified HHS, affected individuals, and the media. In response to the breach, the CE implemented additional administrative and technical safeguards to better protect its ePHI. OCR obtained assurances that the CE implemented the corrective actions noted.

The source's own words, from the revision above.

Figures, per source

  • 34,055 individuals affected (total reported), as reported by the HHS OCR breach portal (HIPAA breaches affecting 500 or more individuals), source date Dec. 12, 2016, revision observed 2026-10-18.

Each figure is one source's figure with the basis that source gave. Figures from different sources are shown side by side and are not added, averaged or chosen between.

Timeline

Source dates are the dates the sources give. Observation dates are when BreachRecords recorded each revision.

  • Submission date at the HHS OCR breach portal (HIPAA breaches affecting 500 or more individuals)
  • Observed by BreachRecords (revision 14332)
  • Approved by a reviewer

Organizations linked by a reviewer

  • Quest Diagnostics Incorporated Named as the covered entity Provisional: identity as filed, not yet matched to the directory Linked 2026-10-19, method provisional.

Archived evidence

  • 3dbc27dd5742e041cc1e7fe18cc669e2901fbd3b86b7007ed27948ff4d406e1f
    text/csv, 5,530,996 bytes, from the HHS OCR breach portal (HIPAA breaches affecting 500 or more individuals), retrieved 2026-10-18 16:15 UTC. Archived privately · Provenance · Source page

Records reflect source filings as of the dates shown. BreachRecords is not a regulator.

Request a correction

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