DisclosureLens
AccidentalHealthcareFinancial ServicesHealthcareMisconfigurationData MishandlingCustomer Data InvolvedPHIHealth (basic)LowContained

Blue Shield of California

bd_9bd2fb4193f7d2b5 · schema v1 · pii pii-v1

Severity

Low

Discovered

Nov 8, 2024

Filed

Mar 28, 2025

To disclose

20 weeks

Affected

Not disclosed

Linked

2 filings

Confidence

66%

Blue Shield of California notified members that a data mismatch error in a health information exchange feed allowed family members on the same plan to potentially view each other's health records (visit types, dates, providers, medications) via the Member Portal between Oct 28 and Nov 11, 2024. The issue was identified on Nov 8, 2024, and the data feed was terminated on Nov 11, 2024. No demographic identifiers, SSNs, or financial data were exposed.

Incident timeline

undetected · 11 days
discovery → filing · 20 weeks / 140 days

Oct 28, 2024

Begins

Nov 8, 2024

Discovered

Mar 28, 2025

Filed

vs. sector median

+10 wks slower

This filing is one of 2 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Filing propagation · 2 filings

View merged incident ↗
HHS OCRFeb 28 · first
California State AG+28d · this page

Pattern: first filing Feb 28 (CA), last Mar 28 (CA) — a 28-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.