HHS OCR report · 2023
Oak Valley Hospital District data breach
OCR report facts
- Covered entity
- Oak Valley Hospital District
- Entity type
- Healthcare Provider
- State
- California
- Individuals affected
- 284,629
- Submission date
- Sep 15, 2023
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- No
- Status
- Archive (closed)
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 investi...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Oak Valley Hospital District data breach?
The report to HHS OCR lists 284,629 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Sep 15, 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 Oak Valley Hospital District 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 Oak Valley Hospital District.