McLaren Health Care says data breach impacts 743,000 patients
McLaren Health Care is warning 743,000 patients that the health system suffered a data breach caused by a July 2024 attack by the INC ransomware gang. Although the attack was discovered on August 5, 2024, forensic investigations determining who was impacted were only completed on May 5, 2025, with the notice circulation starting last Friday. McLaren is a nonprofit health system in the U.S. with $6.6 billion in annual revenue, operating a network that spans 14 Michigan hospitals (2,624 beds). I