Confirmed breach. Intrusion Sep 21, 2014, discovered May 5, 2015 — the first regulatory filing landed 73 days later. 4,500,000 individuals reported across the linked filings.
Discovery variance · Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster; needs two dated filings.
Regulatory clocksHIPAA✓ HHS notifiedFull clock table in Litigation Timeline
HHS OCRState AGConfirmedLifecycle stage 2 of 3: ConfirmedUnverified claimConfirmedEnforcedhigh sensitivity
Affected (total reported)
4,500,000
Data types
4
Identity (basic) · Government ID · Health (basic)
Jurisdictions
2
CA HI
Linked filings
3
HHS OCR · State AG
Sensitive data
identity_government
Timeline
Earliest sighting first · deep chronology in Litigation Timeline
Breach window
Sep 21, 2014
When the intrusion reportedly occurred, per the linked filings
UCLA Health reported a cyberattack in California affecting patient data including names, SSNs, DOBs, and medical records. The breach occurred as early as September 2014, discovered May 2015. FBI and forensic experts are investigating. ID Experts provided credit monitoring and identity theft recovery services.
🐻CALIFORNIAHHS OCRlinked via same-victim cross-source · 100%
UCLA Health reported to HHS on 2015-07-17 a Hacking/IT Incident affecting approximately 4,500,000 individuals. A hacker accessed parts of the covered entity's computer network containing clinical and demographic information. The incident was reported to the FBI and a forensic analysis was conducted. Breach notifications were sent to HHS, affected individuals, and the media. The CE implemented technical and administrative safeguards following the breach. OCR obtained assurances of corrective action. Breached information located on Network Server.
Affected (this filing): 4,500,000
🌺Hawaii State AGMost recentlinked via same-victim cross-source · 100%
UCLA Health Services reported a data breach to the Hawaii Office of Consumer Protection. The office was notified on 2015/07.22. Breach type: Hackers/Unauthorized Access. 5,446 Hawaii residents were affected. Recovered from the Internet Archive after the notice was removed from the OCP table.
About this clustering
DisclosureLens links filings into incidents through layered matchers: deterministic rules (same source document, multistate filings of one breach, tight-window same-victim pairs), a weighted-similarity scorer for cross-source candidates, and an operator review queue for everything uncertain. Each link records its own method and confidence — shown per filing in the timeline below. The system defaults to NOT merging when uncertain, because a false merge (collapsing two unrelated breaches) is more harmful than a false split (showing related filings separately); uncertain pairs route to human review instead of auto-merging. Filing summaries shown in the timeline are AI-generated extracts — verify each against its linked source.