DisclosureLens
HackingHealthcareHealthcareCustomer Data InvolvedData ExfiltratedDelayed DiscoveryPIIIdentity (basic)Government IDHigh

Blue Cross and Blue Shield of Kansas City

bd_21a03a3b15639ecf · schema v1 · pii pii-v1

Severity

High

Discovered

Mar 27, 2021

Filed

Jun 2, 2021

To disclose

10 weeks

Affected · nationwide

47,034164 in this filing

Linked

5 filings

Confidence

65%
Full breach record for Blue Cross and Blue Shield of Kansas City →3 incidents on file

Blue Cross and Blue Shield of Kansas City reported a data breach affecting 47,034 individuals, including 164 Maine residents. The breach occurred on February 23, 2021, and was discovered on March 27, 2021. Described as an external system breach or hacking, it resulted in the compromise of names and Social Security Numbers. The company began notifying affected individuals in writing on May 26, 2021, and offered 24 months of identity theft protection services.

Maine clockDiscovered Mar 27, 2021 → Filed with AG Jun 2, 202167d ⏱ ME AG >30d10 weeks discovery → filing
⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 32 days
discovery → filing · 10 weeks / 67 days

Feb 23, 2021

Begins

Mar 27, 2021

Discovered

Jun 2, 2021

Filed

vs. sector median

2 wks faster

This filing is one of 5 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Filing propagation · 5 filings · 5 states

View merged incident ↗
Montana State AGMay 26 · first
Indiana State AGMay 26 · first
New Hampshire State AG+2d
Maine State AG+7d · this page
Massachusetts State AG+8d

Pattern: first filing May 26 (MT), last Jun 3 (MA) — a 8-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.