One linked filing — more sources may join as they report · filed Dec 12, 2023. View entity profile → Other incidents for this victim →
incident inc_d5a17014fb084608 · 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)
CA
all HHS OCR
Earliest sighting first · deep chronology in Litigation Timeline
City of Hope reported to HHS on 2023-12-12 a Hacking/IT Incident affecting 902,540 individuals. Breached information located on Network Server. The cyber-attack exposed PHI including names, DOB, SSN, driver's license, financial, and health insurance data. The entity notified HHS, individuals, and media, and implemented additional administrative, technical, and security safeguards.
Affected (this filing): 902,540
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.