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44 disclosed this week · 26,355 on record

Memorial Hermann Health System

Disclosed Mar 31, 20211,893 affectedConfirmed

Official notice

The covered entity (CE), Memorial Hermann Health System, reported that an employee of its business associate (BA) uploaded the protected health information (PHI) of 1,893 individuals to the Internet; the data was then viewable by the public. The PHI involved included names, addresses, dates of birth, Social Security numbers, diagnoses, claims and health insurance information, and other treatment information. The CE notified HHS, affected individuals, the media, and provided substitute notice. In response to the breach, the BA provided complimentary credit monitoring services and implemented additional technical safeguards.

What is known

People affected1,893 (as reported to HHS)
DisclosedMar 31, 2021
AttackInsider
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

Other breaches at Memorial Hermann Health System

History of this record
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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