One linked filing — more sources may join as they report · filed Dec 3, 2020. View entity profile → Other incidents for this victim →
incident inc_73aa6483d0cf4eea · merge_method deterministic
Not recorded for this incident
Discovery variance · Leak precedence · Materiality delta · SEC filing delay · Filing span — no leak-site claim in this cluster; no SEC 8-K in this cluster; needs two dated filings.
PHI · Health (basic) · Identity (basic)
PA
all HHS OCR
Earliest sighting first · deep chronology in Litigation Timeline
Allegheny Health Network reported to HHS on 2020-12-03 a Hacking/IT Incident affecting 299,507 individuals. A business associate experienced a ransomware attack affecting electronic protected health information (ePHI) located on a network server. The ePHI included names, addresses, dates of birth, and treatment information. The entity notified HHS, affected individuals, and the media.
Affected (this filing): 299,507
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.