One linked filing — more sources may join as they report · filed Feb 28, 2020. View entity profile → Other incidents for this victim →
incident inc_ef91e28dcd95464f · 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.
PII · PHI · Health (basic)
CA
all State AG
Earliest sighting first · deep chronology in Litigation Timeline
Oct 6, 2019 → Dec 20, 2019
When the intrusion reportedly occurred, per the linked filings
Nov 1, 2019
Reported by CALIFORNIA AG filing
Kaiser Health Plan, Southern California, reported a privacy breach involving the misdelivery of mail containing PHI and PII (names, addresses, diagnosis, billing, health insurance info) to former addresses between Oct 6 and Dec 20, 2019. Discovered Nov 1, 2019, the error was corrected Dec 20, 2019. No SSN or credit card data was included. No fraud detected. Staff training is being developed.
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.