One linked filing — more sources may join as they report · filed Nov 6, 2020. View entity profile → Other incidents for this victim →
incident inc_5183d0a503634d91 · 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.
Government ID · Identity (basic)
CA
all State AG
Earliest sighting first · deep chronology in Litigation Timeline
Oct 16, 2020 → Oct 20, 2020
When the intrusion reportedly occurred, per the linked filings
Oct 20, 2020
Reported by CALIFORNIA AG filing
Blue Shield of California experienced a data incident in October 2020 where provider directories incorrectly displayed members' Social Security Numbers or Tax Identification Numbers as provider IDs. The error occurred on Blue Shield's and vendor Arvato's websites between October 16-20, 2020. Blue Shield removed the directories, retrieved/destroyed copies, and offered 12 months of Experian IdentityWorks. No misuse is known.
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.