HHS OCR report ยท 2025
Exact Sciences Laboratories LLC data breach
OCR report facts
- Covered entity
- Exact Sciences Laboratories LLC
- Entity type
- Healthcare Provider
- State
- Wisconsin
- Individuals affected
- 2,658
- Submission date
- Dec 29, 2025
- Type of breach
- Unauthorized Access/Disclosure
- Location of breached information
- Paper/Films
- Business associate present
- No
- Status
- Archive (closed)
OCR description
The covered entity (CE), Exact Sciences Laboratories LLC, reported that an employee mailed the protected health information (PHI) of 2,658 individuals to the wrong recipients. The PHI involved included clinical and demographic information. The CE notified HHS, the media and affected individuals. In response to the breach, the CE implemented additional administrative and technical safeguards and retrained the employee to better protect PHI.
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Exact Sciences Laboratories LLC data breach?
The report to HHS OCR lists 2,658 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Dec 29, 2025.
What type of breach was it?
The OCR portal lists the type of breach as Unauthorized Access/Disclosure, with the breached information located in: Paper/Films.
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 Exact Sciences Laboratories LLC 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 Exact Sciences Laboratories LLC.