- State
- CA
- Covered entity type
- Healthcare Provider
- Individuals affected
- 5,178
- Business associate present
- No
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- First seen by InfoSec Signals
- 9/23/2026
- Last seen in OCR export
- 9/23/2026
OCR description
The covered entity (CE), Kaiser Permanente Northern California Division of Research, reported a breach of 5,178 individuals’ electronic protected health information (e-PHI), as a result of a malware software infection on its computer server. The types of ePHI involved in the breach included names, dates of birth, genders, addresses, race/ethnicity information, medical record numbers, lab results, and responses patients provided to research-related questions. The CE provided breach notification to HHS, affected individuals, and the media. Following the breach, the CE conducted an updated security analysis, revised its policies and procedures, and provided training to its workforce members. OCR obtained written assurances that the CE implemented the corrective actions noted above and provided technical assistance regarding the HIPAA Security Rule.
Change history
- 9/23/2026Added 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.