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Leak SitePressHHS OCRState AGConfirmed11 filings · 6 statesLifecycle stage 2 of 3: ConfirmedUnverified claimConfirmedEnforcedrhysidacritical sensitivity
Merged incident · 11 filings

ANN & ROBERT H. LURIE CHILDREN'S HOSPITAL OF CHICAGO — January 2024 breach

Clustered 11 filings across 7 jurisdictions · filing window Aug 8, 2023 → Jun 27, 2024. View entity profile → Other incidents for this victim →

⚠ 2 cross-filing discrepancies →Merge100%

Determination

Confirmed

Members

11 filings

States

6

Affected · reported

791,784

First → last filing

Aug 8, 2023 → Jun 27, 2024

Merge confidence

100%

incident inc_42763dc44889420f · merged by deterministic · confidence 100%

Confirmed breach. Merged as one breach: 8 regulatory filings, 1 press report and 2 unverified claims. The filings describe unauthorized access. Intrusion Jan 26, 2024–Jan 31, 2024, discovered Jan 26, 2024. 791,784 individuals reported across the linked filings. Data reported: Government ID, Minor, PHI, and 5 more. Notifications rolled out on a 324-day schedule across 8 filings beginning Aug 8, 2023. Each member filing remains the legal record for its jurisdiction.

Litigation Timing

Supplemental
Discovery variance
143days

Range of discovered_at dates across filings

Leak precedence
Noneclaim trailed by 176d

Days between the first leak-site claim and the first regulatory filing. Positive = the claim came first (public exposure before disclosure). Negative = the claim trailed the filing, so there was no pre-disclosure leak. Counts regulatory filings only — press coverage is not a regulatory disclosure.

Filing span
324days

Time between earliest and latest filing

Not recorded for this incident

Materiality delta · SEC filing delay — no SEC 8-K in this cluster.

Regulatory clocksVermont✗ VT AG >45 bdayLeak gap⏱ Leak >90dHIPAA✓ HHS notifiedFull clock table in Litigation Timeline

Sensitive data

financial_credentialsidentity_governmentminor

Incident timeline

Jan 26, 2024breach begins
Jan 26, 2024discovered · members disagree
Aug 8, 2023first filing
Jun 27, 2024most recent filing

Dashed segments are unestablished, not zero — they fill in as filings merge into this incident.

Member cascade — every filing about this breach

  1. AUG 8HHS OCRHHS OCR noticefirst filing · states nationwide total 1,997day 0
  2. JAN 31Leak siterhysida postattacker claim · unverified+176d
  3. FEB 27Leak siterhysida postattacker claim · unverified+203d
  4. JUN 1IL AGIL AG noticeno count stated+298d
  5. JUN 27ME AGME AG noticestates nationwide total 791,784+324d
  6. JUN 27VT AGVT AG noticeno count stated+324d
  7. JUN 27MA AGMA AG notice103 MA residents+324d
  8. JUN 27HHS OCRHHS OCR noticestates nationwide total 775,860+324d
  9. JUN 27IN AGIN AG noticestates nationwide total 791,784+324d
  10. JUN 27CA AGCA AG noticemost recent · no count stated+324d
  11. Watching for additional filings — new sources merge into this incident automatically.

Roll-up facts — reconciled across members

Breach window
Jan 26, 2024 – Jan 31, 2024
ME AG
Discovered
Jan 26, 2024IL AGJan 31, 2024VT AGJun 17, 2024ME AGfilings disagree on discovery
Data types
Financial account · Financial credentials · Health (basic) · Identity (basic) · Government ID · Minor · PHI · PII
HHS OCR + ME AG + VT AG +2
Attack vector
Unauthorized Access
HHS OCR

Each fact cites the member filing that establishes it; when filings conflict, every value shows with its source.

Count reconciliation

per-state reported counts

Nationwide (stated in a filing)

791,784

Sum of filed state slices

491· 0.1% of stated

100% of the stated total lives in states whose filings carry no count — the dashed share shrinks as filings land.

US791,784
IN380
MA103
ME8

State AGs report only their own residents; teal bars show each state's reported slice. The gray US row is the nationwide total reported in a linked filing.

Evidence ladder — rungs this incident occupies

Leak-site claim2 members

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

Press / market report1 member

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

State AG / regulator filing8 members

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

SEC 8-K / victim statement

No SEC filing or victim statement yet.

Merge provenance

Method
deterministic
Confidence
1.00 · above the 0.85 auto-merge floor
Reviewed
operator-reviewed Aug 22, 2026 · at least one link edge was human-adjudicated
Audit
Every link edge records its method, confidence and model + prompt versions (100% is the strongest edge).

Merges are reversible — a wrong link can be detached with its audit trail intact. How merging works.

Filing velocity

Spread

324 days

Cadence

~1 / 32.4d

vs. multi-state median

36.0× slower

About this clustering

DisclosureLens links filings into incidents through layered matchers: deterministic rules (same source document, multistate filings of one breach, tight-window same-victim pairs), a weighted-similarity scorer for cross-source candidates, and an operator review queue for everything uncertain. Each link records its own method and confidence — shown per filing in the timeline below. The system defaults to NOT merging when uncertain, because a false merge (collapsing two unrelated breaches) is more harmful than a false split (showing related filings separately); uncertain pairs route to human review instead of auto-merging. This page states only what the linked filings agree on; each filing's own account stays on its own record, linked from the timeline below.

The weekly clock on records like this one

The Disclosure Clock is a weekly briefing on what landed in the disclosure record, and the gap between the criminals' post and the regulator's filing — measured on the whole record, with the method shown.

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