HHS OCR report ยท 2023
Health Care Service Corporation data breach
OCR report facts
- Covered entity
- Health Care Service Corporation
- Entity type
- Health Plan
- State
- Illinois
- Individuals affected
- 220,913
- Submission date
- Aug 21, 2023
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- Yes
- Status
- Archive (closed)
OCR description
The covered entity (CE), Health Care Service Corporation, reported that its business associate (BA) experienced a cyber-attack that compromised the protected health information (PHI) of 220,913 individuals. The PHI involved included names, addresses, email addresses, phone numbers, dates of birth, Social Security numbers, claims and financial information, and other treatment information. The CE notified HHS, affected individuals, and the media. OCR provided technical assistance regarding the ...
Text as published on the HHS OCR breach portal.
Other reports by Health Care Service Corporation
| Covered entity | State | Entity type | Individuals | Submitted | Type of breach | Status |
|---|---|---|---|---|---|---|
| Health Care Service Corporation | IL | Health Plan | 2,944 | Apr 13, 2025 | Unauthorized Access/Disclosure | Archive (closed) |
| Health Care Service Corporation | IL | Health Plan | 574 | Mar 23, 2020 | Unauthorized Access/Disclosure | Archive (closed) |
| Health Care Service Corporation | IL | Health Plan | 998 | Sep 6, 2019 | Unauthorized Access/Disclosure | Archive (closed) |
| Health Care Service Corporation | IL | Health Plan | 1,182 | Apr 24, 2019 | Unauthorized Access/Disclosure | Archive (closed) |
| Health Care Service Corporation | IL | Health Plan | 501 | Sep 17, 2015 | Theft | Archive (closed) |
| Health Care Service Corporation | IL | Health Plan | 501 | Oct 26, 2012 | Theft | Archive (closed) |
| Health Care Service Corporation | IL | Health Plan | 501 | Jul 28, 2011 | Theft | Archive (closed) |
Frequently asked questions
How many people were affected by the Health Care Service Corporation data breach?
The report to HHS OCR lists 220,913 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Aug 21, 2023.
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 Health Care Service Corporation 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 Health Care Service Corporation.