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47 disclosed this week · 26,367 on record

Mayo Clinic

Disclosed Nov 3, 20231,152 affectedConfirmed

Official notice

Mayo Clinic, the covered entity (CE), reported that an employee inadvertently submitted the protected health information (PHI) of 1,152 individuals to an academic journal; the data was then published via the Internet. The PHI involved included names, dates of birth, lab results, medical records numbers, gender, race, and treatment information. The CE notified HHS and affected individuals. In its mitigation efforts, the CE implemented additional administrative safeguards to better protect PHI. Staff were retrained.

What is known

People affected1,152 (as reported to HHS)
DisclosedNov 3, 2023
AttackInsider
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

Other breaches at Mayo Clinic

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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