CALIFORNIAHackingHealthcareHealthcareBusiness Associate (HIPAA)Customer Data InvolvedData ExfiltratedIdentity (basic)Health (basic)PHIHighContained

Health Net of California

bd_a9328c7c0e1f3279 · schema v1 · pii pii-v1

Severity

High

Discovered

—

Filed

Mar 25, 2021

To disclose

—

Affected

550,828

Linked

2 filings

Confidence

68%

Full breach record for Health Net of California →

Health Net of California reported to HHS on 2021-03-25 a Hacking/IT Incident affecting 550,828 individuals. Breached information located on Network Server. A business associate experienced a cyber-attack affecting ePHI including names, addresses, DOB, and treatment info. CE provided credit monitoring and terminated BA relationship.

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HIPAA clock✓ HHS notified

⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

⚠ No discovery dateThe OCR public portal omits the discovery date, so the 60-day notification clock cannot be evaluated from this source — only that the filing was submitted.

Incident timeline — partial

? — ?

Breach window unknown

Mar 25, 2021

Filed

—

Corroborated · see linked filings

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

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

Part of Accellion supply-chain incident (2021) — a supply-chain cascade affecting multiple organizations.View cascade →

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

California State AGbd_9e18ea5d93b3f5632021-03-25Verified

Name: Health Net of California
norm: health net of california
Industry: Insurance — Health

Name: Health Net of California
norm: health net of california
Industry: Healthcaresource default

Discovered: Not extracted — the OCR public portal omits it
Materiality determined: —
Notification sent: —
Affected individuals: 550,828nationwide
Data types: Identity (basic)Health (basic)PHI
HHS breach type: Hacking / IT incident
Where the data lived: Network server
Covered-entity type: Health planBusiness associate involved
Attack vector: Unauthorized Access
MITRE ATT&CK: T1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Notified HHS

During the incident: Notified HHS
Notified affected individuals
Notified the media
Provided substitute notice
Provided complimentary credit monitoring services to affected individuals
Terminated its business relationship with the BA
Source: Quoted from the filing itself, not independently verified.

Compliance flags: HHS notified
Discovery-date grounding: no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.
Clock breakdown: Statute Window Elapsed Threshold Status
HIPAA
Discovered: not extracted
→ Notified: not extracted
— regulatory submission HHS notified

Statute	Window	Elapsed	Threshold	Status
HIPAA	Discovered: not extracted → Notified: not extracted	—	regulatory submission	HHS notified

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings

View merged incident ↗

California State AGMar 25 · first

HHS OCRMar 25 · first · this page

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.

Source URL: https://ocrportal.hhs.gov/ocr/breach/breach_report.jsf
DisclosureLens renders the full SEC/HHS filing inline below from the originating regulator’s public record (§4.5 fair report privilege).
Filed at: Mar 25, 2021
Raw hash: 48bece8d06163f83a070aa135131e79629886fc426f7d9a54988acf4e1cc2004

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Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityHealth Net of California

Victim entityHealth Net of California

IncidentUnauthorized Access

Stated responseNotified HHS

ComplianceHHS notified

Extraction provenanceno artifact recorded

Source provenanceocrportal.hhs.gov

Source filing