HHS OCR report ยท 2026
Cullen/Frost Bankers, Inc. data breach
OCR report facts
- Covered entity
- Cullen/Frost Bankers, Inc.
- Entity type
- Health Plan
- State
- Texas
- Individuals affected
- 4,698
- Submission date
- Mar 26, 2026
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- Yes
- Status
- Archive (closed)
OCR description
The covered entity (CE), Cullen/Frost Bankers, Inc., reported that it was notified by its business associate (BA) that the BA experienced a breach of its network that affected the protected health information (PHI) of 4,698 individuals. The PHI involved names, dates of birth, social security numbers, and other identifiers. The CE notified HHS, the media, and the affected individuals. OCR provided technical assistance to the CE regarding the HIPAA Rules.
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Cullen/Frost Bankers, Inc. data breach?
The report to HHS OCR lists 4,698 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Mar 26, 2026.
What type of breach was it?
The OCR portal lists the type of breach as Hacking/IT Incident, with the breached information located in: Network Server.
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 Cullen/Frost Bankers, Inc. 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 Cullen/Frost Bankers, Inc..