Definition
for
Code
SystemIdentifierUse
{
"resourceType" : "CodeSystem",
"id" : "identifier-use",
"meta" : {
"lastUpdated" : "2023-03-26T15:21:02.749+11:00"
"lastUpdated" : "2025-11-20T23:56:49.898+00:00"
},
"text" : {
"status" : "generated",
"div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p>This code system <code>http://hl7.org/fhir/identifier-use</code> defines the following codes:</p><table class=\"codes\"><tr><td style=\"white-space:nowrap\"><b>Code</b></td><td><b>Display</b></td><td><b>Definition</b></td></tr><tr><td style=\"white-space:nowrap\">usual<a name=\"identifier-use-usual\"> </a></td><td>Usual</td><td>The identifier recommended for display and use in real-world interactions which should be used when such identifier is different from the "official" identifier.</td></tr><tr><td style=\"white-space:nowrap\">official<a name=\"identifier-use-official\"> </a></td><td>Official</td><td>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.</td></tr><tr><td style=\"white-space:nowrap\">temp<a name=\"identifier-use-temp\"> </a></td><td>Temp</td><td>A temporary identifier.</td></tr><tr><td style=\"white-space:nowrap\">secondary<a name=\"identifier-use-secondary\"> </a></td><td>Secondary</td><td>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.</td></tr><tr><td style=\"white-space:nowrap\">old<a name=\"identifier-use-old\"> </a></td><td>Old</td><td>The identifier id no longer considered valid, but may be relevant for search purposes. E.g. Changes to identifier schemes, account merges, etc.</td></tr></table></div>"
"div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: CodeSystem identifier-use</b></p><a name=\"identifier-use\"> </a><a name=\"hcidentifier-use\"> </a><p>This case-sensitive code system <code>http://hl7.org/fhir/identifier-use</code> defines the following codes:</p><table class=\"codes\"><tr><td style=\"white-space:nowrap\"><b>Code</b></td><td><b>Display</b></td><td><b>Definition</b></td></tr><tr><td style=\"white-space:nowrap\">usual<a name=\"identifier-use-usual\"> </a></td><td>Usual</td><td>The identifier recommended for display and use in real-world interactions which should be used when such identifier is different from the "official" identifier.</td></tr><tr><td style=\"white-space:nowrap\">official<a name=\"identifier-use-official\"> </a></td><td>Official</td><td>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.</td></tr><tr><td style=\"white-space:nowrap\">temp<a name=\"identifier-use-temp\"> </a></td><td>Temp</td><td>A temporary identifier.</td></tr><tr><td style=\"white-space:nowrap\">secondary<a name=\"identifier-use-secondary\"> </a></td><td>Secondary</td><td>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.</td></tr><tr><td style=\"white-space:nowrap\">old<a name=\"identifier-use-old\"> </a></td><td>Old</td><td>The identifier id no longer considered valid, but may be relevant for search purposes. E.g. Changes to identifier schemes, account merges, etc.</td></tr></table></div>"
},
"extension" : [{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
"valueCode" : "fhir"
},
{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
"valueCode" : "normative"
},
{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-normative-version",
"valueCode" : "4.0.0"
},
{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
"valueInteger" : 5
}],
"url" : "http://hl7.org/fhir/identifier-use",
"identifier" : [{
"system" : "urn:ietf:rfc:3986",
"value" : "urn:oid:2.16.840.1.113883.4.642.1.58"
}],
"version" : "5.0.0",
"version" : "6.0.0-ballot3",
"name" : "IdentifierUse",
"title" : "IdentifierUse",
"status" : "active",
"experimental" : false,
"date" : "2023-03-26T15:21:02+11:00",
"publisher" : "HL7 (FHIR Project)",
"date" : "2025-11-20T23:56:49+00:00",
"publisher" : "HL7 International / FHIR Infrastructure",
"contact" : [{
"telecom" : [{
"system" : "url",
"value" : "http://hl7.org/fhir"
},
{
"system" : "email",
"value" : "fhir@lists.hl7.org"
}]
},
{
"telecom" : [{
"system" : "url",
"value" : "http://www.hl7.org/Special/committees/fiwg"
}]
}],
"description" : "Identifies the purpose for this identifier, if known .",
"jurisdiction" : [{
"coding" : [{
"system" : "http://unstats.un.org/unsd/methods/m49/m49.htm",
"code" : "001",
"display" : "World"
}]
}],
"caseSensitive" : true,
"valueSet" : "http://hl7.org/fhir/ValueSet/identifier-use",
"content" : "complete",
"concept" : [{
"code" : "usual",
"display" : "Usual",
"definition" : "The identifier recommended for display and use in real-world interactions which should be used when such identifier is different from the \"official\" identifier."
},
{
"code" : "official",
"display" : "Official",
"definition" : "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."
},
{
"code" : "temp",
"display" : "Temp",
"definition" : "A temporary identifier."
},
{
"code" : "secondary",
"display" : "Secondary",
"definition" : "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."
},
{
"code" : "old",
"display" : "Old",
"definition" : "The identifier id no longer considered valid, but may be relevant for search purposes. E.g. Changes to identifier schemes, account merges, etc."
}]
}
Usage
note:
every
effort
has
been
made
to
ensure
that
the
examples
are
correct
and
useful,
but
they
are
not
a
normative
part
of
the
specification.
Terminology
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