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Regulator-posted notice

Breach notice filed by Oak Street Health (November 2023)

Organization named: Oak Street Health Provisional: identity as filed, not yet matched to the directory
Type as the source lists it: Unauthorized Access/Disclosure

What the sources say

HHS OCR breach portal (HIPAA breaches affecting 500 or more individuals) Primary notice

Posted on the HHS Office for Civil Rights breach portal with a submission date of Nov. 24, 2023.

Organization as reported
Oak Street Health, IL
Entity type as reported
Healthcare Provider
Category as reported
Unauthorized Access/Disclosure
Location of information as reported
Paper/Films
Submission date
Nov. 24, 2023
Observed by BreachRecords
2026-10-18 16:15 UTC (revision 10322, row:1461)
Archived copy
Held in the private archive (provenance)

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.

The source's own words, from the revision above.

Figures, per source

  • 3,169 individuals affected (total reported), according to the HHS Office for Civil Rights breach portal, source date Nov. 24, 2023, revision observed 2026-10-18.

Each figure is one source's figure with the basis that source gave. Figures from different sources are shown side by side and are not added, averaged or chosen between.

Timeline

Source dates are the dates the sources give. Observation dates are when BreachRecords recorded each revision.

  • Submission date (HHS Office for Civil Rights breach portal)
  • Observed by BreachRecords (revision 10322)
  • Approved by a reviewer

Organizations linked by a reviewer

  • Oak Street Health Named as the covered entity Provisional: identity as filed, not yet matched to the directory Linked 2026-10-19, method provisional.

Archived evidence

  • 3dbc27dd5742e041cc1e7fe18cc669e2901fbd3b86b7007ed27948ff4d406e1f
    text/csv, 5,530,996 bytes, retrieved from HHS Office for Civil Rights breach portal, 2026-10-18 16:15 UTC. Archived privately · Provenance · Source page

Records reflect source filings as of the dates shown. BreachRecords is not a regulator.

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