Oak Street Health
Disclosed Nov 24, 20232 years ago3,169 affectedConfirmed
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.
What is known
| People affected | 3,169 (as reported to HHS) |
|---|---|
| Disclosed | Nov 24, 2023 |
| Attack | Insider |
| Data exposed | Names, Health |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| HHS OCR breach report (archive, resolved): Oak Street Health (Healthcare Provider, IL)ocrportal.hhs.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| HHS archivetotal | Nov 24, 2023 | 3,169 |
History of this record
- 2026-09-25 · added · backfill source
First seen 2026-09-25 (HHS archive), confirmed by HHS OCR. Record counts are as reported. Not legal advice.