National Health Index

The National Health Index number (NHI number) is a unique identifier that is assigned to every person who uses health and disability support services in New Zealand.

The National Health Index (NHI) number is a unique identifier assigned to every person who uses health and disability Services in New Zealand. This accurately identifies people and links them with the right health records.

Our unique NHI numbers are important for good decision-making and help plan, coordinate and provide health and disability services across New Zealand.

The NHI is associated with the Medical Warnings System (MWS), which warns health care providers of any known risk factors that may be important when making clinical decisions about individual patient care.

The format of NHI numbering is changing to ensure the NHI continues to function at its best for many more years.

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