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47 disclosed this week · 26,367 on record

MHMR Authority of Brazos Valley

Disclosed Feb 28, 202383,245 affectedConfirmed

Official notice

The covered entity (CE), MHMR Authority of Brazos Valley, reported that it experienced a ransomware incident that affected the protected health information (PHI) of approximately 78,984 individuals who were patients of the CE. The PHI involved included names, addresses, dates of birth, Social Security numbers, claims information, and diagnoses or conditions. The CE notified HHS, the affected individuals, the media, and posted substitute notice on its website. In response to the breach, the CE provided free credit monitoring to the affected individuals, and implemented additional administrative, technical, and security safeguards to better protect its PHI. During the investigation, OCR provided CE with technical assistance.

What is known

People affected83,245 (as reported by the organization)
DisclosedFeb 28, 2023
HappenedNov 5, 2022
AttackHacking
Data exposedNamesHealth
SectorGovernment · US
StatusConfirmed

Sources

Notices filed

History of this record
attack2026-09-25
unknown to hackingby backfillSource
data_types2026-09-25
[] to ["names","health"]by backfillSource
disclosed2026-09-25
2023-07-28 to 2023-02-28by backfillSource
summary2026-09-25
empty to The covered entity (CE), MHMR Authority of Brazos Valley, reported that it experienced a ransomware incident that affected the protected health information (PHI) of approximately 78,984 individuals who were patients of the CE. The PHI involby backfillSource
records_basis2026-09-25
empty to organizationby backfillSource
records2026-09-25
empty to 83245by backfillSource
occurred2026-09-25
empty to 2022-11-05by backfillSource
Added2026-09-25
First recordedby backfillSource

First seen 2026-09-25 (Vermont AG), confirmed by Vermont AG. Record counts are as reported. Not legal advice.

Everything about MHMR Authority of Brazos Valley