HHS OCR report ยท 2021
Guidehouse data breach
OCR report facts
- Covered entity
- Guidehouse
- Entity type
- Business Associate
- State
- Virginia
- Individuals affected
- 91,331
- Submission date
- Jul 15, 2021
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- Yes
- Status
- Archive (closed)
OCR description
The covered entity (CE), Guidehouse, reported that its secure file transfer device experienced a cyber-attack that affected the protected health information (PHI) of approximately 91,331 individuals. The PHI involved included, names, dates of birth, diagnoses/conditions, and claims information. The CE notified HHS, affected individuals, and the media. In response to the breach, the CE applied a critical patch shortly after the cyber-attack which mitigated the vulnerability. Additionally, the ...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Guidehouse data breach?
The report to HHS OCR lists 91,331 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Jul 15, 2021.
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 Guidehouse 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 Guidehouse.