- State
- CA
- Covered entity type
- Healthcare Provider
- Individuals affected
- 69,000
- Business associate present
- No
- Type of breach
- Hacking/IT Incident
- Location of breached information
- First seen by InfoSec Signals
- 9/23/2026
- Last seen in OCR export
- 9/23/2026
OCR description
The covered entity (CE), Sonoma Valley Healthcare District, reported that it was the subject of a ransomware attack that affected the protected health information (PHI) of 69,000 individuals. The PHI involved included names, dates of birth, addresses, claims information, diagnoses, lab results, and other treatment data. The CE notified HHS, affected individuals, the media, and provided substitute notice. In response to the breach, the CE implemented additional administrative, technical, and security safeguards to better protect its PHI. As part of the investigation, OCR provided technical assistance to the CE regarding the HIPAA Rules.
Change history
- 9/23/2026Added to OCR's archive list
Source: U.S. Department of Health and Human Services, Office for Civil Rights, Breach Portal. Records are reproduced as published; entity names and figures are OCR's.