Hoag Memorial Hospital Presbyterian is notifying individuals of a data security incident that may have exposed personal and protected health information.
The hospital discovered suspicious activity within its network on Oct. 8, 2026, and immediately launched an investigation with the assistance of independent forensic experts. The investigation found that certain files may have been accessed without authorization.
Hoag Hospital subsequently engaged an independent team to review the potentially affected files. On Oct. 25, 2026, the review determined that some individuals' personal and/or protected health information may have been included in the affected data.
The information potentially involved included individuals' names along with other personal or health information. The hospital did not specify the additional data elements in its notice.
Following the discovery, Hoag Hospital took steps to secure its digital environment, including implementing enhanced security measures intended to help prevent similar incidents in the future.
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