Back to the register
McLaren Health Care Corporation
ArchivedSubmitted 07/16/2021
Updated 12 hours ago ()
- State
- MI
- Covered entity type
- Healthcare Provider
- Individuals affected
- 64,600
- Business associate present
- Yes
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- First seen by InfoSec Signals
- Sep 23, 2026
- Last seen in OCR export
- Oct 25, 2026
OCR description
The covered entity (CE), McLaren Health Care Corporation, reported that its business associate experienced a ransomware attack that affected the electronic protected health information (ePHI) of 64,600 individuals. The ePHI involved included names, addresses, dates of birth, drivers’ license numbers, Social Security numbers, diagnoses, clinical information, and other treatment information. The CE notified HHS, affected individuals, the media, and posted substitute notice on its website. In response to the breach, the BA strengthened its administrative and technical safeguards to better protect ePHI.
Change history
- Sep 23, 2026Added to OCR's archive list
Source: HHS OCR Breach Portal, U.S. Department of Health and Human Services, Office for Civil Rights about this source
Records are reproduced as published; entity names and figures are OCR's.