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44 disclosed this week · 26,355 on record

Memorial Hermann Health System

Disclosed May 13, 2019604 affectedConfirmed

Official notice

The covered entity (CE), Memorial Hermann Health System, reported that a workforce member inadvertently emailed a spreadsheet containing the protected health information (PHI) of 507 individuals. The PHI involved included the names, medical record numbers, financial information, insurance information, and clinical information. The CE notified HHS, affected individuals, and the media. Following the incident, the CE sanctioned the workforce member and revised its procedures to better safeguard PHI. The CE also contacted the email recipient and received assurances that the information had been deleted. OCR obtained assurances that the CE implemented the corrective actions noted above.

What is known

People affected604 (as reported to HHS)
DisclosedMay 13, 2019
AttackInsider
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

Other breaches at Memorial Hermann Health System

History of this record
records2026-09-25
507 to 604by backfillSource
disclosed2026-09-25
2019-07-02 to 2019-05-13by backfillSource
Added2026-09-25
First recordedby backfillSource

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

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