TriZetto data breach: health tech giant reveals personal info of 3.4 million users may have been affected

• TriZetto breach exposed data of 3.4 million people
• Attackers siphoned sensitive patient and insurance records for nearly a year
• Company offering identity monitoring services after discover

The TriZetto data breach may have been going on for almost a year, and affected around 3.4 million people, it has admitted.

The company filed a new data breach notification with the Office of the Maine Attorney General and started notifying affected individuals about the incident, noting it spotted “suspicious activity within a web portal that some of TPS’ healthcare provider customers use to access our system” on October 2, 2025.

The follow-up investigation determined that an unnamed threat actor gained access to the system in November 2024 and has been, until October 2025, stealing patient data.