CALIFORNIASocial EngineeringHealthcareFinancial ServicesHealthcarePhishingCustomer Data InvolvedIdentity (basic)Health (basic)MediumResolved

Health Plan of San Mateo

bd_832929322c4b59cb · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Mar 17, 2023

To disclose

—

Affected

11,894

Linked

2 filings

Confidence

97%

Full breach record for Health Plan of San Mateo →3 incidents on file

Health Plan of San Mateo (CA) reported to HHS OCR on 2023-03-17 a Hacking/IT Incident (email phishing) affecting 11,894 individuals. An employee was the subject of an email phishing scheme that exposed PHI including names, dates of birth, diagnoses/conditions, medications, and other treatment information. Breached information located in Email. No business associate was involved. The CE notified HHS, affected individuals, the media, and posted a substitute notice. Additional administrative, technical, and security safeguards were implemented.

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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 17, 2023

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

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

California State AGbd_de9fe860bf4d3e2c2023-03-17Verified

Name: Health Plan of San Mateo
norm: health plan of san mateo
Industry: Insurance — Health

Name: Health Plan of San Mateo
norm: health plan of san mateo
Industry: Insurance — Health
Industry: Healthcaresource defaultFinancial Servicesllm

Discovered: Not extracted — the OCR public portal omits it
Materiality determined: —
Notification sent: —
Affected individuals: 11,894nationwide
Data types: Identity (basic)Health (basic)
HHS breach type: Hacking / IT incident
Where the data lived: Email
Covered-entity type: Health plan
Attack vector: Unauthorized Access
MITRE ATT&CK: T1566 PhishingT1566.002 Spearphishing Link
Threat actor: External
Regulator citations: HHS OCR notified
Initial access: phishing_link

During the incident: Notified HHS
Notified affected individuals
Notified media
Posted substitute notice on website
Implemented additional administrative, technical, and security safeguards
Changes made: Additional administrative safeguards implemented
Additional technical safeguards implemented
Additional security safeguards implemented
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 17 · first

HHS OCRMar 17 · 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 17, 2023
Raw hash: e74cdd64225f300dbf0a109ab45a8ace24be54efd326b9d514b7bed78bdd542f

AI-assisted summary above. The structured extract on this page was generated from the document below. Inspect the source to verify or correct any field.

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Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityHealth Plan of San Mateo

Victim entityHealth Plan of San Mateo

IncidentUnauthorized Access

Stated responseNotified HHS

ComplianceHHS notified

Extraction provenanceno artifact recorded

Source provenanceocrportal.hhs.gov

Source filing