HHS OCR report ยท 2016
Quest Diagnostics data breach
OCR report facts
- Covered entity
- Quest Diagnostics
- Entity type
- Healthcare Provider
- State
- New Jersey
- Individuals affected
- 34,055
- Submission date
- Dec 12, 2016
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- No
- Status
- Archive (closed)
OCR description
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 imple...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Quest Diagnostics data breach?
The report to HHS OCR lists 34,055 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Dec 12, 2016.
What type of breach was it?
The OCR portal lists the type of breach as Hacking/IT Incident, with the breached information located in: Network Server.
Is the investigation still open?
No. The report is in the OCR portal archive, which holds reports where OCR has closed its review.
Is a breach notice letter from Quest Diagnostics legitimate?
This site cannot verify letters. Check the sender against the organisation's official website and the HHS OCR breach portal, and avoid calling numbers or clicking links only listed in an unexpected message. See our guide on what to do after a data breach notice.
Source: HHS OCR Breach Portal, OCR export October 2026. Network USA is not affiliated with HHS or Quest Diagnostics.