- NHI's uses the letters A-Z without I or O.
- NHI's start with three letters and end with four numbers.
- The last digit is a checksum.
- NHI's are assigned randomly. I believe hospitals have distinct sets ready to be assigned.
- Its possible for somebody to have multiple NHIs (first alphabetically is the primary).
The current Id. structure only allows for around 13.8 million NHI's. With a population of around 5 million in 2019 and the possibility of a single person being associated to multiple Id.s, I suspect NHIs in their current form wont be around very long.
(last checked 2019-02-20)