HHS OCR report ยท 2026
Chickasaw Nation Department of Health data breach
Chickasaw Nation Department of Health, a healthcare provider in Oklahoma, reported a breach affecting 1,607 individuals to HHS OCR on Jun 11, 2026.
OCR report facts
- Covered entity
- Chickasaw Nation Department of Health
- Entity type
- Healthcare Provider
- State
- Oklahoma
- Individuals affected
- 1,607
- Submission date
- Jun 11, 2026
- Type of breach
- Unauthorized Access/Disclosure
- Location of breached information
- Electronic Medical Record
- Business associate present
- No
- Status
- Under investigation
Frequently asked questions
How many people were affected by the Chickasaw Nation Department of Health data breach?
The report to HHS OCR lists 1,607 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Jun 11, 2026.
What type of breach was it?
The OCR portal lists the type of breach as Unauthorized Access/Disclosure, with the breached information located in: Electronic Medical Record.
Is the investigation still open?
Yes. The OCR portal lists this report as under investigation.
Is a breach notice letter from Chickasaw Nation Department of Health 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 Chickasaw Nation Department of Health.