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University of Michigan/Michigan Medicine

Disclosed Jul 19, 20242 years ago57,891 affectedConfirmed

Official notice

The covered entity (CE), University of Michigan, reported that an employee mailed a postcard which exposed the protected health information (PHI) of 1,015 individuals. The PHI involved included names, addresses, and diagnoses/conditions. The CE notified HHS, affected individuals, and the media. In response to the breach, the CE implemented additional administrative and technical safeguards to better protect PHI. Staff were retrained.

What is known

People affected57,891 (as reported to HHS)
DisclosedJul 19, 2024
AttackInsider
Data exposedNames, Health
SectorHealthcare · US
StatusConfirmed

Sources

Source
HHS OCR breach report: University of Michigan/Michigan Medicine (Healthcare Provider, MI)ocrportal.hhs.gov · Official notice

Notices filed

WhereFiledPeople
HHS archivetotalJul 19, 202456,953
HHS archivetotalSep 26, 202457,891
HHS archivetotalAug 13, 20251,015
HHS OCRtotalMay 1551

Other breaches at University of Michigan/Michigan Medicine

BreachAffected
Disclosed Mar 3, 2022Mar 3, 20224 years agoHacking34K
Disclosed Oct 16, 2020Oct 16, 20205 years agoInsider1,062
Disclosed Jun 25, 2018Jun 25, 20188 years agoHacking5,466
History of this record
  • 2026-09-25 · disclosed: 2024-09-26 to 2024-07-19 · backfill source
  • 2026-09-25 · records: 1015 to 57891 · backfill source
  • 2026-09-25 · disclosed: 2025-08-13 to 2024-09-26 · backfill source
  • 2026-09-25 · records: 551 to 1015 · backfill source
  • 2026-09-25 · disclosed: 2026-05-01 to 2025-08-13 · backfill source
  • 2026-09-25 · summary: empty to The covered entity (CE), University of Michigan, reported that an employee mailed a postcard which exposed the protected health information (PHI) of 1,015 individuals. The PHI involved included names, addresses, and diagnoses/conditions. Th · backfill source
  • 2026-09-25 · added · backfill source

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

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