HHS OCR report · 2019
Centrelake Medical Group, Inc. data breach
OCR report facts
- Covered entity
- Centrelake Medical Group, Inc.
- Entity type
- Healthcare Provider
- State
- California
- Individuals affected
- 197,661
- Submission date
- Apr 16, 2019
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- No
- Status
- Archive (closed)
OCR description
Centrelake Medical Group, Inc., a business associate (BA), reported that it was the victim of cyber-attack involving ransomware that affected the protected health information (PHI) of 197,661 individuals. The PHI involved included names, addresses, phone numbers, drivers’ license information, Social Security numbers, claims information, diagnoses/conditions, and treatment information. The BA notified HHS, affected covered entities, affected individuals, the media, and provided substitute no...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Centrelake Medical Group, Inc. data breach?
The report to HHS OCR lists 197,661 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Apr 16, 2019.
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 Centrelake Medical Group, Inc. 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 Centrelake Medical Group, Inc..