Ascension Health has reported that a cyberattack, specifically a ransomware attack detected in May 2024, has compromised sensitive medical information and payment data of approximately 5.6 million patients. The health care giant began notifying affected individuals on December 19, 2024. This breach is part of a growing trend in health care cybersecurity incidents, with experts anticipating increased security regulations for health care providers in 2025. Additionally, a separate data breach at American Addiction Centers has impacted 422,000 individuals, highlighting ongoing vulnerabilities in the sector.