Horizon Healthcare RCM — December 2024 breach

Clustered 8 filings across 7 jurisdictions · filing window Jun 27, 2025 → Jul 1, 2025. View entity profile → Other incidents for this victim →

⚠ 2 cross-filing discrepancies →Merge100%

Determination

Confirmed

Members

8 filings

States

Affected · reported

210,901

First → last filing

Jun 27, 2025 → Jul 1, 2025

Merge confidence

100%

incident inc_dce6f20e11cc461b · merged by deterministic · confidence 100%

Confirmed breach. Merged as one breach: 8 regulatory filings. Intrusion Dec 25, 2024–Dec 27, 2024, discovered Dec 27, 2024 — the first regulatory filing landed 182 days later. 210,901 individuals reported across the linked filings. Data reported: Government ID, Identity (basic), Health (basic), and 1 more. Each member filing remains the legal record for its jurisdiction.

Litigation Timing

Supplemental

Notification delay

182days

Discovered → first regulatory filing

Discovery variance

144days

Range of discovered_at dates across filings

Filing span

4days

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 clocksMaine⏱ ME AG >30d · 38dSouth Carolina✓ SC CRA notice dueHIPAA✓ HHS notifiedMassachusetts✓ MA credit monitoring dueFull clock table in Litigation Timeline

No cross-filing comparison data available for this incident.

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