DisclosureLens
ILLINOISAccidentalHealthcareHealthcareMisdeliveryBusiness Associate (HIPAA)Customer Data InvolvedPHIIdentity (basic)Health (basic)MediumResolved

Oak Street Health

bd_a45aee35809e438b · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Nov 24, 2023

To disclose

—

Affected

3,169

Confidence

97%
Full breach record for Oak Street Health →2 incidents on file

Oak Street Health (IL) reported to HHS on 2023-11-24 an Unauthorized Access/Disclosure affecting 3,169 individuals. A vendor employee mailed PHI — including names, birthdates, addresses, phone numbers, and health insurance and treatment information — to the wrong recipients. Breached information located on Paper/Films. The CE notified HHS, affected individuals, and the media, strengthened administrative safeguards, and terminated the vendor relationship.

HIPAA clock✓ HHS notified
⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.
⚠ No discovery dateThe OCR public portal omits the discovery date, so the 60-day notification clock cannot be evaluated from this source — only that the filing was submitted.

Incident timeline — partial

? — ?

Breach window unknown

Nov 24, 2023

Filed

—

No filing yet · watching

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed3,169 affectedView incident

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.