A function to check strings against the New Zealand Ministry of Health NHI Validation Routine. Supports the old and new NHI number formats specified in HISO 10046:2023.
cargo add nhi
use nhi::is_nhi;
fn main() {
println!("{}", is_nhi("ZAC5361")); // true
println!("{}", is_nhi("ZBN77VL")); // true
println!("{}", is_nhi("ZZZ0044")); // false
println!("{}", is_nhi("ZZZ00AA")); // false
}Checks are case-insensitive.
Note: This does not check that the NHI number has been assigned to a person, it merely checks the NHI is consistent with the HISO 10046:2023 standard.
NHI numbers that begin with Z are reserved for testing.
If you wish to exclude these values, you will need to manually check for a Z
prefix:
use nhi::is_nhi;
fn main() {
let value = "zvb97xq";
println!("{}", is_nhi(value)); // true
println!("{}", !value.to_uppercase().starts_with('Z') && is_nhi(value)); // false
}Note: This check does not mean that the NHI number has been assigned to a person, it just means that the NHI value is not reserved for testing.