Evergreen Treatment Services

Evergreen Treatment Services (ETS) is a nonprofit organization that provides addiction treatment services. It delivers substance abuse treatment programs to individuals seeking recovery. The organization operates multiple clinics that offer treatment services. ETS handles sensitive patient information, including names, addresses, dates of birth, Social Security numbers, and treatment records. As part of its operations, the organization is responsible for maintaining patient confidentiality.

Evergreen Treatment Services was founded in Seattle, establishing its origins in the Pacific Northwest. The organization’s headquarters is located in the United States of America. It is recognized as a nonprofit entity, meaning it does not have private owners or a profit‑driven motive. ETS’s footprint includes several clinic locations, as indicated by its operation of multiple facilities. The organization serves individuals seeking help for substance use disorders within its service area.

ETS specializes in addiction treatment, focusing on the medical and psychosocial aspects of substance use disorders. On February 10, 2023, the organization experienced a cybersecurity incident involving unauthorized access to its IT systems. The breach compromised the personal data of 21,325 individuals, including the information types listed above. In response, Evergreen Treatment Services notified affected patients and engaged third‑party cybersecurity experts to investigate the incident. The organization reviewed the compromised files and submitted a required disclosure to federal health authorities as part of its regulatory obligations.