Data breach exposes users of major patient portal ManageMyHealth

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

ManageMyHealth Data Breach Affects Thousands of Patients On December 30, 2025, ManageMyHealth reported a data breach caused by the ransomware group Kazu. Thousands of patients are anxious about the exposure of their personal information as Health New Zealand collaborates with the National Cyber Security Centre to assess the situation. 2 sources 43