Nearly a million patients hit by DaVita dialysis ransomware attack

DaVita, a major kidney dialysis provider, suffered a ransomware attack by the Interlock gang in 2025. The breach affected 916,000 patients, making it the second-largest healthcare attack in the United States that year. The ransomware incident compromised sensitive patient information, including names, birthdates, Social Security numbers, and medical details. DaVita disclosed the breach and stated that it was working with law enforcement and cybersecurity experts to investigate and address the incident. The company emphasized that patient care was not disrupted during the attack, and they were taking steps to notify affected individuals and provide support and resources. The incident highlights the ongoing threat of ransomware attacks in the healthcare sector, which often hold sensitive patient data hostage.
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