HHS OCR report · 2017
Pacific Alliance Medical Center data breach
OCR report facts
- Covered entity
- Pacific Alliance Medical Center
- Entity type
- Healthcare Provider
- State
- California
- Individuals affected
- 266,123
- Submission date
- Aug 10, 2017
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- No
- Status
- Archive (closed)
OCR description
The covered entity (CE) was the victim of a malware/ransom attack affecting the protected health information (PHI) of 266,123 patients. The PHI involved in the breach included names, dates of birth, addresses, social security numbers, driver’s license information, claims information, and treatment information such as diagnoses, medications, lab results, and medical images. The CE provided breach notification to HHS, affected individuals, and the media. Following the breach, the CE strengthe...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Pacific Alliance Medical Center data breach?
The report to HHS OCR lists 266,123 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Aug 10, 2017.
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 Pacific Alliance Medical Center 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 Pacific Alliance Medical Center.