Breachesby GlyphGuidehouse
Disclosed Jul 15, 202191,331 affectedConfirmed
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.
What is known
| People affected | 91,331 (as reported to HHS) |
|---|---|
| Disclosed | Jul 15, 2021 |
| Happened | Jan 20, 2021 |
| Attack | Hacking |
| Data exposed | NamesHealth |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
Notices filed
History of this record
other to healthby backfillSource
unknown to hackingby backfillSource
[] to ["names","health"]by backfillSource
empty to hhsby backfillSource
empty to 91331by backfillSource
2021-07-16 to 2021-07-15by backfillSource
empty to 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 by backfillSource
First recordedby backfillSource
First seen 2026-09-25 (California AG), confirmed by California AG. Record counts are as reported. Not legal advice.