HackingHealthcareHealthcareSupply Chain (3P Vendor)Customer Data InvolvedDelayed DiscoveryPHIGovernment IDIdentity (basic)Health (basic)MediumContained

Indian Health Center of Santa Clara Valley

bd_bac2cdfe9be41db3 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 2, 2025

Filed

Jan 16, 2026

To disclose

15 weeks

Affected

Not disclosed

Linked

2 filings

Confidence

65%

Full breach record for Indian Health Center of Santa Clara Valley →

Indian Health Center of Santa Clara Valley notified patients of a data breach originating from third-party vendor Trizetto Provider Solutions. An unauthorized actor accessed historical eligibility transaction reports on Trizetto's web portal from November 2024 to October 2025. Affected data includes PHI, SSNs, and demographic information. No financial data was compromised. Trizetto engaged Mandiant, contained the threat, and is offering credit monitoring via Kroll.

J jump to incidentP pin to compareR raw source

California clockDiscovered Oct 2, 2025 → Notified Jan 5, 202695d ✗ CA 60-day late15 weeks discovery → filing

Incident timeline

undetected · 335 days

discovery → filing · 15 weeks / 106 days

Nov 1, 2024

Begins

Oct 2, 2025

Discovered

Jan 16, 2026

Filed

vs. sector median

+3 wks slower

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

Part of TriZetto Provider Solutions supply-chain incident (2025) — a supply-chain cascade affecting multiple organizations.View cascade →

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

HHS OCRbd_c79f423fe58d01cf2026-01-05 · +11dVerified

Name: Indian Health Center of Santa Clara Valley
norm: indian health center of santa clara valley

Name: Indian Health Center of Santa Clara Valley
norm: indian health center of santa clara valley
Industry: Healthcarellm

Discovered: Oct 2, 2025
Breach occurred: Nov 1, 2024 – Oct 2, 2025
Undetected for: 335 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 5, 2026
Affected individuals: Not disclosed
Data types: PHIGovernment IDIdentity (basic)Health (basic)
Data elements: Social Security numberDate of birthMedical information
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Third party: via Trizetto Provider Solutions

During the incident: Engaged Mandiant, an external cybersecurity expert
Reviewed the security of the affected web portal application
Eliminated the threat to the environment
Notified law enforcement and is cooperating with their investigation
Provided Single Bureau Credit Monitoring, Single Bureau Credit Report, Single Bureau Credit Score, and proactive fraud assistance services through Kroll
Changes made: Implemented and is continuing to implement additional security protocols designed to enhance the security of its services
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 15 weeks(106 days from discovery to filing)
Compliance flags: CA 60-day late · 95dCA AG copy ≤15d · 11d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: Oct 2, 2025
→ Notified: Jan 5, 2026
95d 60 days (analyst band, pre-2026 discoveries) CA 60-day late
California
Consumers notified: Jan 5, 2026
→ AG copy submitted: Jan 16, 2026
11d 15 calendar days CA AG copy ≤15d

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Oct 2, 2025 → Notified: Jan 5, 2026	95d	60 days (analyst band, pre-2026 discoveries)	CA 60-day late
California	Consumers notified: Jan 5, 2026 → AG copy submitted: Jan 16, 2026	11d	15 calendar days	CA AG copy ≤15d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings

View merged incident ↗

HHS OCRJan 5 · first

California State AG+11d · this page

Pattern: first filing Jan 5 (CA), last Jan 16 (CA) — a 11-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.

Source URL: https://oag.ca.gov/ecrime/databreach/reports/sb24-617156
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 16, 2026
Raw hash: 657cd3faee413ba5bb511d69ae501e3b49653ed046465d963c0e5a90a74a049e

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityIndian Health Center of Santa Clara Valley

Victim entityIndian Health Center of Santa Clara Valley

Incidentdiscovered Oct 2, 2025

Stated responseEngaged Mandiant, an external cybersecurity expert

ComplianceCA 60-day late

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov