Horizon Behavioral Health
ent_437a3ab97bda0784c413cd97
Disclosures
5
State AG · HHS OCR · 5 jurisdictions
Multi-filing incidents
1
incidents joining 2+ filings here
Max affected reported
49,303
nationwide · HHS OCR VA
Leak-site claims
0
none in sample
Identity resolution
- Canonical name
- Horizon Behavioral Health
- Normalized
- horizon behavioral health— dedupe via name-norm; Microsoft / MSFT collapse to one row
- GLEIF LEI
- No match
- SEC EDGAR CIK
- None — not an SEC registrant
- Domain
- None on record
Disclosure history (5)newest first
- Vermont State AGas victim2025-04-21
Horizon Behavioral Health disclosed a ransomware incident discovered on March 16, 2025, with activity starting around March 13, 2025. The breach impacted patient demographic data (SSN, DL), clinical information, and insurance claims. Horizon engaged forensic experts, notified the FBI and CISA, and provided complimentary identity monitoring to affected individuals.
- Nebraska State AGas victim2025-04-21
Horizon Behavioral Health notified Nebraska AG of a ransomware incident discovered on March 16, 2025, with unauthorized access occurring between March 13 and 16, 2025. The breach impacted patient demographic, government ID, clinical, and insurance data. Horizon engaged law enforcement (FBI, CISA) and forensic experts, providing complimentary identity monitoring to affected individuals.
- 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.
- Montana State AGas victim2025-04-21
Horizon Behavioral Health notified Montana residents of a ransomware incident discovered on March 16, 2025, with unauthorized access occurring between March 13 and 16, 2025. The breach impacted PHI, including clinical information, and PII such as SSNs and driver's license numbers. Horizon engaged forensic experts, notified law enforcement (FBI, CISA), and provided complimentary identity monitoring to affected individuals.
- Massachusetts State AGas victim2025-04-21
Horizon Behavioral Health reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2025-04-21. 18 Massachusetts residents were affected.