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ReferenceTax and identity numbers

LanguageValues and typesStandard typesTax and identity numbers

NhsNumber

On this page

An NHS number, the patient identifier in England, Wales and the Isle of Man: ten digits.

Use it to identify a patient. Write it with no spaces. text.format adds them: 943 476 5919. For a condition or a diagnosis, use Icd10Code or SnomedConcept.

Shape

One value, held as text in one set form, with no parts: 9990000018.

Example

example
NhsNumber("9434765919")

NhsNumber(raw) checks the text, and text that isn't one breaks the format rule.

text.parse(raw, as: NhsNumber) reads one from text that comes from outside. Text that isn't one at all fails malformed, such as 9434765918, 1234567890 or 943 476 5919.

Good to know

  • It checks its own last digit, so a mistyped number is usually refused.
  • == tells you whether two are the same. < and list.sort_by don't take it.
  • A field that holds one counts as personal data (health), so you don't mark it yourself.

In JSON

A string, in a request, a response or json.write:

json
"9434765919""9990000018"

Details

Text form, storage, how it is shown, and operations

NhsNumber is in the group Tax and identity numbers, and has been in Jadpo since 0.1.0.

Text form

text.from writes one standard text form, the same form text.parse reads back: 9434765919 and 9990000018.

How it is stored

It is stored in one column named for the field, of type text. 9990000018 is stored as '9990000018'.

How it is shown to people

text.format(value, locale:) shows it to people in their locale.

With locale: Locale.en_gb:

Value Shown
9434765919 943 476 5919
9990000018 999 000 0018

Operations

It also takes text.parse, text.from, text.format, json.read, json.write and ==. How every standard type behaves says how they work.

Markdown for agents: /docs/types/type-nhs-number.md.Built from Jadpo main at aee2e8f.