Discovery variance · Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster; needs two dated filings.
Regulatory clocksHIPAA✓ HHS notifiedFull clock table in Litigation Timeline
HHS OCRState AGConfirmedLifecycle stage 2 of 3: ConfirmedUnverified claimConfirmedEnforcedmoderate sensitivity
Affected (total reported)
15,467
Data types
2
Health (basic) · Identity (basic)
Jurisdictions
2
IL MT
Linked filings
2
HHS OCR · State AG
Timeline
Earliest sighting first · deep chronology in Litigation Timeline
Breach window
Aug 3, 2019
When the intrusion reportedly occurred, per the linked filings
Delta Dental of Illinois (IL Health Plan) reported to HHS OCR on 2019-10-25 a Hacking/IT Incident affecting 15,466 individuals. Breached information was located in Email. HHS noted this case was consolidated into an existing compliance review involving the same breach incident. No business associate was present.
Affected (this filing): 15,466
HHS notified
🦬Montana State AGMost recentlinked via same-victim cross-source · 100%
Delta Dental of Illinois reported a data breach to the Montana Attorney General. The breach was reported on 2019-10-28. The breach occurred from 8/3/2019 to 8/19/2019. 1 Montana residents were affected.
Affected (this filing): 1
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. Filing summaries shown in the timeline are AI-generated extracts — verify each against its linked source.