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Leak SiteHHS OCRState AGConfirmed14 filings · 8 statesLifecycle stage 2 of 3: ConfirmedUnverified claimConfirmedEnforcedhunters_internationalhigh sensitivity
Merged incident · 14 filings

Fred Hutchinson Cancer Center — October 2023 breach

Clustered 14 filings across 9 jurisdictions · filing window Nov 24, 2023 → Aug 1, 2024. View entity profile → Other incidents for this victim →

⚠ 2 cross-filing discrepancies →Merge100%

Determination

Confirmed

Members

14 filings

States

8

Affected · reported

1,840,927

First → last filing

Nov 24, 2023 → Aug 1, 2024

Merge confidence

100%

incident inc_9789705e3fa14c2c · merged by human · confidence 100%

Confirmed breach. Merged as one breach: 12 regulatory filings and 2 unverified claims. The filings describe unauthorized access. Intrusion Oct 27, 2023–Nov 25, 2023, discovered Oct 27, 2023 — the first regulatory filing landed 54 days later (flagged late). 1,840,927 individuals reported across the linked filings. Data reported: Government ID, PHI, Identity (basic), and 3 more. Notifications rolled out on a 251-day schedule across 12 filings beginning Nov 24, 2023. Each member filing remains the legal record for its jurisdiction.

Litigation Timing

Notification delay
54days

Discovered → first regulatory filing

Discovery variance
23days

Range of discovered_at dates across filings

Leak precedence
26days before filing

Days between the first leak-site claim and the first regulatory filing. Positive = the claim came first (public exposure before disclosure). Negative = the claim trailed the filing, so there was no pre-disclosure leak. Counts regulatory filings only — press coverage is not a regulatory disclosure.

Filing span
251days

Time between earliest and latest filing

Not recorded for this incident

Materiality delta · SEC filing delay — no SEC 8-K in this cluster.

Regulatory clocksWashington✗ WA AG >90dLeak gap✗ Leak >180dVermont⏱ VT AG >14 bdayOregon✓ OR AG ≤45dHIPAA✓ HHS notifiedMassachusetts✓ MA credit monitoring dueFull clock table in Litigation Timeline

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Fred Hutchinson Cancer Center data breach (2023) · DisclosureLens