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

Bay Area Community Health

bd_9b9eeabec9b21f90 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 15, 2025

Filed

Jan 16, 2026

To disclose

5 weeks

Affected

Not disclosed

Linked

2 filings

Confidence

65%

Full breach record for Bay Area Community Health →

Bay Area Community Health notified patients of a data breach involving a third-party vendor, TriZetto, which works with their electronic medical record system (OCHIN). An unauthorized individual gained access to TriZetto's systems. The breach window is listed as November 1, 2024, to October 2, 2025. Bay Area Community Health was notified on December 15, 2025. Affected data may include names, social security numbers, dates of birth, contact information, and health-related or insurance information. The organization is working with OCHIN to ensure security measures are in place and reviewing its own processes.

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California clockDiscovered Dec 15, 2025 → Notified Jan 5, 202621d ✓ CA 60-day OK5 weeks discovery → filing

Incident timeline

undetected · 409 days

discovery → filing · 5 weeks / 32 days

Nov 1, 2024

Begins

Dec 15, 2025

Discovered

Jan 16, 2026

Filed

vs. sector median

7 wks faster

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_d31ad34b7b8b712c2026-01-16Verified

Name: Bay Area Community Health
norm: bay area community health

Name: Bay Area Community Health
norm: bay area community health
Industry: Healthcarellm

Discovered: Dec 15, 2025
Breach occurred: Nov 1, 2024 – Oct 2, 2025
Undetected for: 409 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: T1195 Supply Chain Compromise
Threat actor: External
Third party: via TriZetto
Initial access: supply_chain

During the incident: Working closely with OCHIN to understand what happened and ensure protection of patient information
Monitoring vendor’s compliance with appropriate security safeguards
Reviewing own processes to reduce the risk of something like this happening again
Changes made: Reviewing own processes to reduce the risk of something like this happening again
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(32 days from discovery to filing)
Compliance flags: CA 60-day OK · 21dCA 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: Dec 15, 2025
→ Notified: Jan 5, 2026
21d 60 days (analyst band, pre-2026 discoveries) CA 60-day OK
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: Dec 15, 2025 → Notified: Jan 5, 2026	21d	60 days (analyst band, pre-2026 discoveries)	CA 60-day OK
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 16 · first

California State AGJan 16 · 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://oag.ca.gov/ecrime/databreach/reports/sb24-617255
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: 20de045f9f8c3db1107d39628f06f7fee366546853dbf6b6e73384466ab92f52

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityBay Area Community Health

Victim entityBay Area Community Health

Incidentdiscovered Dec 15, 2025

Stated responseWorking closely with OCHIN to understand what happened and ensure protection of patient information

ComplianceCA 60-day OK

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov