norm: horizon servicesUSno LEI · no CIKMax severity: High

Canonical registry

Horizon Services

ent_f2898e10ce0a5a7679fca87f

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Disclosures

1

HHS OCR · 1 jurisdiction

Multi-filing incidents

—

no multi-filing incident in sample

Max affected reported

49,303

nationwide · HHS OCR VA

Leak-site claims

0

none in sample

Identity resolution

Canonical name: Horizon Services
Normalized: horizon services— dedupe via name-norm; Microsoft / MSFT collapse to one row
GLEIF LEI: No match
SEC EDGAR CIK: None — not an SEC registrant
Domain: horizonservices.com

Disclosure history (1)newest first

VIRGINIAHHS OCRas victim2025-04-21
Horizon Behavioral Health reported to HHS on 2025-04-21 a Hacking/IT Incident affecting 49,303 individuals. Breached information located on Network Server. The incident involved ransomware encrypting PHI including names, DOBs, SSNs, driver's license numbers, diagnoses, medications, and claims information.