Healthcare Security Breaches 2025 List. As we approach the midpoint of 2025, the healthcare sector continues to be a prime target for ransomware attacks. For comparison, roughly 44 million.

On january 9, 2025, concentra health services confirmed that the protected health information of nearly 4 million patients was compromised in the cyberattack on perry johnson & associates, inc. In the year to august 31, 2025, there have been 491 data breaches of 500 or more records, and at least 58,668,002 records are known to have been breached.