HHS OCR report ยท 2024
Guardant Health, Inc. data breach
OCR report facts
- Covered entity
- Guardant Health, Inc.
- Entity type
- Healthcare Provider
- State
- California
- Individuals affected
- 9,309
- Submission date
- Apr 26, 2024
- Type of breach
- Unauthorized Access/Disclosure
- Location of breached information
- Network Server
- Business associate present
- No
- Status
- Archive (closed)
OCR description
The covered entity (CE), Guardant Health, Inc., reported that a workforce member inadvertently made the protected health information (PHI) of 9,309 individuals viewable over the Internet. The PHI involved included names, ages, medical record and identification numbers, and treatment information. The CE notified HHS and the affected individuals. In response to the breach, the CE sanctioned its workforce member and implemented additional technical safeguards to better protect its PHI. OCR prov...
Text as published on the HHS OCR breach portal.
Other reports by Guardant Health, Inc.
| Covered entity | State | Entity type | Individuals | Submitted | Type of breach | Status |
|---|---|---|---|---|---|---|
| Guardant Health, Inc. | CA | Healthcare Provider | 1,112 | Sep 14, 2018 | Hacking/IT Incident | Archive (closed) |
Frequently asked questions
How many people were affected by the Guardant Health, Inc. data breach?
The report to HHS OCR lists 9,309 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Apr 26, 2024.
What type of breach was it?
The OCR portal lists the type of breach as Unauthorized Access/Disclosure, 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 Guardant Health, 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 Guardant Health, Inc..