HHS OCR report ยท 2025
UChicago Medicine Medical Group data breach
OCR report facts
- Covered entity
- UChicago Medicine Medical Group
- Entity type
- Healthcare Provider
- State
- Illinois
- Individuals affected
- 38,656
- Submission date
- May 23, 2025
- 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), UChicago Medicine Medical Group, reported that it was the subject of a cybersecurity incident that affected the protected health information of 38,656 individuals. The PHI involved included names, Social Security numbers, addresses, dates of birth, claims information, diagnoses/conditions, and treatment information. The CE notified HHS, the affected individuals and the media. In response to the breach, the CE provided complimentary credit monitoring services to the af...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the UChicago Medicine Medical Group data breach?
The report to HHS OCR lists 38,656 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on May 23, 2025.
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 UChicago Medicine Medical Group 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 UChicago Medicine Medical Group.