HHS OCR report · 2023
California Physicians’ Services dba Blue Shield of California data breach
OCR report facts
- Covered entity
- California Physicians’ Services dba Blue Shield of California
- Entity type
- Health Plan
- State
- California
- Individuals affected
- 1,553
- Submission date
- Apr 5, 2023
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- Yes
- Status
- Archive (closed)
OCR description
The covered entity (CE), California Physicians’ Services dba Blue Shield of California, reported that its business associate’s (BA) subcontractor suffered a hacking attack affecting the protected health information (PHI) of 1,553 individuals. The PHI involved included names, dates of birth, and addresses. The CE notified HHS, affected individuals, the media, and posted substitute notice on its website. In response to the breach, the CE severed its connection with the servers affected by the b...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the California Physicians’ Services dba Blue Shield of California data breach?
The report to HHS OCR lists 1,553 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Apr 5, 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 California Physicians’ Services dba Blue Shield of California 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 California Physicians’ Services dba Blue Shield of California.