Identifies the purpose for this identifier, if known .
This Code system is referenced in the content logical definition of the following value sets:
This CodeSystem is not used here; it may be used elsewhere (e.g. specifications and/or implementations that use this content)
This case-sensitive code system http://hl7.org/fhir/identifier-use defines the following codes:
Code
Display
Definition
usual
Usual
The identifier recommended for display and use in real-world interactions which should be used when such identifier is different from the "official" identifier.
official
Official
The identifier considered to be most trusted for the identification of this item. Sometimes also known as "primary" and "main". The determination of "official" is subjective and implementation guides often provide additional guidelines for use.
temp
Temp
A temporary identifier.
secondary
Secondary
An identifier that was assigned in secondary use - it serves to identify the object in a relative context, but cannot be consistently assigned to the same object again in a different context.
old
Old
The identifier id no longer considered valid, but may be relevant for search purposes. E.g. Changes to identifier schemes, account merges, etc.