- State
- CA
- Covered entity type
- Business Associate
- Individuals affected
- 337,245
- Business associate present
- Yes
- 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 business associate (BA), Health Center Partners of Southern California, reported that its vendor experienced a ransomware attack that affected the electronic protected health information (ePHI) of 337,245 individuals. The ePHI involved included names, diagnoses, Social Security numbers, medications prescribed, financial and health insurance information, and other treatment information. The BA notified HHS, affected individuals, the media, and provided substitute notice. In response to the breach, the BA implemented additional administrative, technical, and security safeguards to better protect ePHI.
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.