HHS OCR report ยท 2023
Mariner Management Group data breach
OCR report facts
- Covered entity
- Mariner Management Group
- Entity type
- Healthcare Provider
- State
- Ohio
- Individuals affected
- 1,756
- Submission date
- Nov 8, 2023
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- No
- Status
- Archive (closed)
OCR description
The covered entity (CE), Mariner Management Group, reported that it experienced a cyberattack that affected the protected health information (PHI) of 1,756 individuals. The PHI involved included names, addresses, Social Security numbers, claims information, diagnoses and conditions, and medications. The CE notified HHS, the affected individuals, the media, and provided substitute notice. In response to the breach, the CE implemented additional technical safeguards to better protect PHI.
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Mariner Management Group data breach?
The report to HHS OCR lists 1,756 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Nov 8, 2023.
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 Mariner Management Group 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 Mariner Management Group.