Harvard Pilgrim Health Care — March 2023 breach

Clustered 35 filings across 10 jurisdictions · filing window May 24, 2023 → Nov 13, 2025. View entity profile → Other incidents for this victim →

⚠ 1 cross-filing discrepancy →Merge100%

Determination

Confirmed

Members

35 filings

States

Affected · reported

2,967,396

First → last filing

May 24, 2023 → Nov 13, 2025

Merge confidence

100%

incident inc_e18630ff1bcc4480 · merged by human · confidence 100%

Confirmed breach. Merged as one breach: 35 regulatory filings. Intrusion Mar 28, 2023–Apr 17, 2023, discovered Apr 17, 2023 — the first regulatory filing landed 37 days later (flagged late). 2,967,396 individuals reported across the linked filings. Data reported: Government ID, PHI, Health (basic), and 3 more. Notifications rolled out on a 904-day schedule across 35 filings beginning May 24, 2023. Each member filing remains the legal record for its jurisdiction.

Litigation Timing

Supplemental

Notification delay

37days

Discovered → first regulatory filing

Discovery variance

0days

Range of discovered_at dates across filings

Filing span

904days

Time between earliest and latest filing

Not recorded for this incident

Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster.

Regulatory clocksVermont✗ VT AG >45 bdayMaine✗ ME AG >90d · 94dOregon✗ OR AG >45dCalifornia✗ CA 60-day late · 304dWashington⏱ WA AG >30dHIPAA✓ HHS notifiedFull clock table in Litigation Timeline

No cross-filing comparison data available for this incident.

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