- State
- IL
- Covered entity type
- Healthcare Provider
- Individuals affected
- 3,169
- Business associate present
- Yes
- Type of breach
- Unauthorized Access/Disclosure
- Location of breached information
- Paper/Films
- First seen by InfoSec Signals
- Sep 23, 2026
- Last seen in OCR export
- Oct 25, 2026
OCR description
Oak Street Health, the covered entity (CE), reported that an employee of its vendor mailed the protected health information (PHI) of 3,169 individuals to the wrong recipients. The PHI involved included names, birthdates, addresses, phone numbers, and health insurance and other treatment information. The CE notified HHS, affected individuals, and the media. In its mitigation efforts, the CE strengthened its administrative safeguards and ended its business relationship with the vendor.
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.