Oncology Institute, Inc. (TOI, DFPH, TOIIW)

The Oncology Institute's patient data never lived only at the Oncology Institute; it sat inside a shared claims clearinghouse that reporting ties to Cognizant's TriZetto, where an intruder had been reading records since late 2024 before anyone noticed. Route a hundred clinics and two million patients through one vendor, and that vendor becomes the front door. TOI has not said how many were exposed or what left, only that Kroll is mailing the notices: the silence is now the disclosure.