- State
- CA
- Covered entity type
- Healthcare Provider
- Individuals affected
- 284,629
- 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
Oak Valley Hospital District, the covered entity (CE), reported that it experienced a cyber-attack that compromised the protected health information (PHI) of 284,629 individuals. The PHI involved included names, addresses, dates of birth, Social Security numbers, health insurance information, diagnoses, lab results, medications, and claims information. The CE notified HHS, affected individuals, the media, and posted substitute notice on its website. In response to the breach and OCR’s investigation, the CE revised its policies and procedures, retrained its workforce members, and implemented additional technical safeguards.
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.