HHS OCR report ยท 2025
University of Michigan/Michigan Medicine data breach
OCR report facts
- Covered entity
- University of Michigan/Michigan Medicine
- Entity type
- Healthcare Provider
- State
- Michigan
- Individuals affected
- 1,015
- Submission date
- Aug 13, 2025
- Type of breach
- Unauthorized Access/Disclosure
- Location of breached information
- Paper/Films
- Business associate present
- No
- Status
- Archive (closed)
OCR description
The covered entity (CE), University of Michigan, reported that an employee mailed a postcard which exposed the protected health information (PHI) of 1,015 individuals. The PHI involved included names, addresses, and diagnoses/conditions. The CE notified HHS, affected individuals, and the media. In response to the breach, the CE implemented additional administrative and technical safeguards to better protect PHI. Staff were retrained.
Text as published on the HHS OCR breach portal.
Other reports by University of Michigan/Michigan Medicine
| Covered entity | State | Entity type | Individuals | Submitted | Type of breach | Status |
|---|---|---|---|---|---|---|
| University of Michigan/Michigan Medicine | MI | Healthcare Provider | 551 | May 1, 2026 | Unauthorized Access/Disclosure | Under investigation |
| University of Michigan/Michigan Medicine | MI | Healthcare Provider | 57,891 | Sep 26, 2024 | Hacking/IT Incident | Archive (closed) |
| University of Michigan/Michigan Medicine | MI | Healthcare Provider | 56,953 | Jul 19, 2024 | Hacking/IT Incident | Archive (closed) |
| University of Michigan/Michigan Medicine | MI | Healthcare Provider | 33,857 | Oct 25, 2022 | Hacking/IT Incident | Archive (closed) |
| University of Michigan/Michigan Medicine | MI | Healthcare Provider | 2,921 | Mar 3, 2022 | Hacking/IT Incident | Archive (closed) |
| University of Michigan/Michigan Medicine | MI | Healthcare Provider | 1,062 | Oct 16, 2020 | Unauthorized Access/Disclosure | Archive (closed) |
| University of Michigan/Michigan Medicine | MI | Healthcare Provider | 5,466 | Aug 16, 2019 | Hacking/IT Incident | Archive (closed) |
| University of Michigan/Michigan Medicine | MI | Healthcare Provider | 3,624 | Sep 28, 2018 | Unauthorized Access/Disclosure | Archive (closed) |
| University of Michigan/Michigan Medicine | MI | Healthcare Provider | 871 | Jun 25, 2018 | Theft | Archive (closed) |
Frequently asked questions
How many people were affected by the University of Michigan/Michigan Medicine data breach?
The report to HHS OCR lists 1,015 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Aug 13, 2025.
What type of breach was it?
The OCR portal lists the type of breach as Unauthorized Access/Disclosure, with the breached information located in: Paper/Films.
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 University of Michigan/Michigan Medicine 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 University of Michigan/Michigan Medicine.