UnitedHealth says Change Healthcare hack affects over 100 million, the largest-ever US healthcare data breach (TechCrunch)

A massive data breach at Change Healthcare, owned by UnitedHealth Group (UHG), exposed the private health information of over 100 million Americans during a February ransomware attack, making it one of the largest data breaches in U.S. history. The breach, attributed to the Russian-speaking ransomware group ALPHV/BlackCat, caused widespread disruptions across the healthcare sector, affecting patient records, insurance billing, and hospital operations. Sensitive personal and medical data, including Social Security numbers, diagnoses, and financial details, were stolen and later partially published online.