Horizon Behavioral Health Data Breach Details
The incident, which began around March 13, 2025, and was discovered on March 16, 2025, involved unauthorized access to Horizon’s computer systems. The breach was promptly addressed, and cybersecurity experts were engaged to investigate the event. However, during the breach window, certain personal and health information may have been compromised.
Upon learning of the ransomware attack, Horizon took immediate action to halt the breach and involved law enforcement, including the FBI and the Department of Homeland Security. Horizon is also evaluating its network security to prevent future incidents. In response to the breach, Horizon is offering complimentary identity monitoring services to those affected by the incident.
Compromised Information
The specific information impacted varies for each individual, but may include:
-
Demographic Information: Name, Social Security Number, address, date of birth, driver’s license number, and other identifiers.
-
Clinical Information: Diagnoses, medications, treatment details, and other related health information.
-
Insurance or Claims Information: Data related to insurance claims or medical services.
While Horizon cannot confirm that all of this information was accessed for every affected individual, they have taken precautionary measures to alert impacted individuals and provide resources to protect their identities.
