HHS OCR report · 2018
Cigna data breach
OCR report facts
- Covered entity
- Cigna
- Entity type
- Health Plan
- State
- Connecticut
- Individuals affected
- 3,500
- Submission date
- Oct 10, 2018
- 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), Cigna, was the victim of a cyber-attack strategy known as “credential stuffing,” where hackers target individuals with the same log in credentials for different websites. The types of protected health information (PHI) involved in the incident included demographic, health claims, and clinical information of potentially 3,500 individuals. The CE provided breach notification to HHS and affected individuals and offered all affected individuals two years of identity prote...
Text as published on the HHS OCR breach portal.
Other reports by Cigna
Frequently asked questions
How many people were affected by the Cigna data breach?
The report to HHS OCR lists 3,500 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Oct 10, 2018.
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 Cigna 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 Cigna.