ManageMyHealth (MMH) cyber security breach involving patient information

Some New Zealanders have been affected by a data breach on ManageMyHealth.

5 January 2026

We’re aware of a data breach affecting some users of the ManageMyHealth (MMH) service. ManageMyHealth is a privately operated patient portal used by some general practices to share health information with their patients.

The NCSC is working with Health NZ and other government agencies in response to this incident.  

For details and updates about this specific incident please visit ManageMyHealth directly:

https://managemyhealth.co.nz(external link) External Link

For more general information about what to do if you’re affected by a data breach, read our guidance:

Keeping safe after a data breach External Link