Topline UnitedHealth Group and its subsidiary Change Healthcare will be investigated by a federal agency over last month's cyber attacks that may have breached patient data—the latest fallout from what the department called an “unprecedented” attack on the U.S. healthcare system. Pages from the United Healthcare website are displayed on a computer screen, Feb. 29, 2024, in New ... [+] York. Federal civil rights investigators are looking into whether protected health information was exposed in a recent cyber ...