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 claimConfirmedEnforced
Affected (total reported)
8,829
Data types
—
Jurisdictions
1
MT
Linked filings
2
HHS OCR · State AG
Timeline
Earliest sighting first · deep chronology in Litigation Timeline
Breach window
Mar 11, 2025
When the intrusion reportedly occurred, per the linked filings
143 days
🦬MONTANAHHS OCRFirst filinglinked via same-victim cross-source · 100%
Western Montana Clinic PC reported to HHS on 2025-08-01 a Hacking/IT Incident affecting 8255 individuals. Breached information located on Email. Employees were targets of an email phishing scheme affecting PHI including clinical and demographic information. The CE implemented additional safeguards and retrained workforce members.
Affected (this filing): 8,255
HHS notified
🦬Montana State AGMost recentlinked via same-victim cross-source · 100%
Western Montana Clinic reported a data breach to the Montana Attorney General. The breach was reported on 2025-08-01. The breach occurred from 03/11/2025 to 04/15/2025. 8,829 Montana residents were affected.
Affected (this filing): 8,829
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.