HHS OCR report · 2020
M&T Bank data breach
OCR report facts
- Covered entity
- M&T Bank
- Entity type
- Business Associate
- State
- New York
- Individuals affected
- 5,878
- Submission date
- Jun 29, 2020
- Type of breach
- Unauthorized Access/Disclosure
- Location of breached information
- Business associate present
- Yes
- Status
- Archive (closed)
OCR description
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 implemen...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the M&T Bank data breach?
The report to HHS OCR lists 5,878 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Jun 29, 2020.
What type of breach was it?
The OCR portal lists the type of breach as Unauthorized Access/Disclosure, with the breached information located in: Email.
Is the investigation still open?
No. The report is in the OCR portal archive, which holds reports where OCR has closed its review.
Is a breach notice letter from M&T Bank legitimate?
This site cannot verify letters. Check the sender against the organisation's official website and the HHS OCR breach portal, and avoid calling numbers or clicking links only listed in an unexpected message. See our guide on what to do after a data breach notice.
Source: HHS OCR Breach Portal, OCR export October 2026. Network USA is not affiliated with HHS or M&T Bank.