- State
- OH
- Covered entity type
- Health Plan
- Individuals affected
- 1,377
- Business associate present
- Yes
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- First seen by InfoSec Signals
- Sep 23, 2026
- Last seen in OCR export
- Oct 25, 2026
OCR description
The covered entity (CE), Medical Mutual of Ohio, reported that a vendor of its business associate (BA) experienced a ransomware attack affecting the protected health information (PHI) of 1,377 individuals. The PHI involved included names, addresses, dates of birth, and health information. The CE notified HHS, affected individuals, the media, and posted substitute notice on its website. In response to the breach, the BA suspended its business relationship with the vendor.
Change history
- Sep 23, 2026Added to OCR's archive list
Source: HHS OCR Breach Portal, U.S. Department of Health and Human Services, Office for Civil Rights about this source
Records are reproduced as published; entity names and figures are OCR's.