A cyberattack that has forced some patients to reschedule their surgeries has prompted Dameron Hospital in Stockton to announce that it is looking into the matter. Operations related to patient care, including the emergency department, are running smoothly, the hospital stated in a statement. A data security incident that affected specific systems on their network was how the hospital explained the problem. Neither the date of the attack nor the systems that might have been compromised were mentioned.

The California Office of the Attorney General reported a security incident at Dameron Hospital on November 4 and 5, 2023. The breach, reported on April 2, 2025, involved unauthorized access to personal data, including names. The exact number of individuals affected remains unknown. This incident highlights the vulnerability of healthcare institutions to data breaches, emphasizing the need for robust cybersecurity measures to protect sensitive patient information.

The California Office of the Attorney General disclosed a data breach affecting Dameron Hospital in December 2017, with the incident occurring on November 17, 2017. The breach involved unauthorized access to sensitive information, compromising the personal and medical data of patients and potentially employees. While the exact scope of the leaked data (e.g., financial records, medical histories, or personally identifiable information) was not detailed in the report, such breaches in healthcare settings often expose highly confidential records, posing risks of identity theft, fraud, or reputational harm to the institution. Hospitals are high-value targets for cybercriminals due to the critical nature of their data, and incidents like this can erode patient trust, trigger regulatory penalties (e.g., under HIPAA), and disrupt operations if systems are compromised. The breach underscores vulnerabilities in healthcare cybersecurity, where delayed detection (over a month in this case) can exacerbate damages.