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Regulator-posted notice

Breach notice filed by Guidehouse (July 2021)

Organization named: Guidehouse 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 Office for Civil Rights breach portal with a submission date of July 15, 2021.

Organization as reported
Guidehouse, VA
Entity type as reported
Business Associate
Category as reported
Hacking/IT Incident
Location of information as reported
Network Server
Submission date
July 15, 2021
Observed by BreachRecords
2026-10-18 16:15 UTC (revision 12009, row:3148)
Archived copy
Held in the private archive (provenance)

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 CE discontinued use of the file transfer device and transitioned to another network.

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

Figures, per source

  • 91,331 individuals affected (total reported), according to the HHS Office for Civil Rights breach portal, source date July 15, 2021, 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 (HHS Office for Civil Rights breach portal)
  • Observed by BreachRecords (revision 12009)
  • Approved by a reviewer

Organizations linked by a reviewer

  • Guidehouse Named as a service provider 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, retrieved from HHS Office for Civil Rights breach portal, 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.

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