One linked filing — more sources may join as they report · filed Oct 27, 2017. View entity profile → Other incidents for this victim →
incident inc_f506d0508a524ea0 · merge_method deterministic
Discovered → first regulatory filing
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)
IL
all HHS OCR
Earliest sighting first · deep chronology in Litigation Timeline
Oct 27, 2017
Reported by HHS OCR filing
Cook County Health & Hospitals System reported to HHS on 2017-10-27 a Unauthorized Access/Disclosure affecting 727 individuals. Breached information located on Network Server. Business associate Experian Health discovered an error in billing platform upgrade resulting in PHI delivery to wrong recipients.
Affected (this filing): 727
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.