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M&T Bank

Disclosed Jun 29, 20206 years ago5,878 affectedConfirmed

Official notice

The business associate (BA), M&T Bank, reported that an employee was the victim of a social engineering attack the compromised the protected health information (PHI) of 5,878 individuals. The PHI involved includes names, addresses, financial and health insurance information, diagnoses, medications prescribed, Social Security numbers, drivers’ license numbers, and other treatment information. The BA notified HHS, affected individuals, and the media. In response to the breach, the BA implemented additional administrative and technical safeguards and retrained its staff on fraud and identity theft prevention.

What is known

People affected5,878 (as reported to HHS)
DisclosedJun 29, 2020
AttackInsider
Data exposedNames, Health
SectorHealthcare · US
StatusConfirmed

Sources

Source
HHS OCR breach report (archive, resolved): M&T Bank (Business Associate, NY)ocrportal.hhs.gov · Official notice

Notices filed

WhereFiledPeople
HHS archivetotalJun 29, 20205,878
History of this record
  • 2026-09-25 · added · backfill source

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

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