This
page
is
part
of
the
Continuous
Integration
Build
of
FHIR
Specification
(v4.0.1:
R4
-
Mixed
Normative
and
STU
)
in
it's
permanent
home
(it
will
always
(will
be
available
incorrect/inconsistent
at
this
URL).
The
current
version
which
supercedes
this
version
is
5.0.0
.
For
a
full
list
of
available
versions,
see
times).
See
the
Directory
of
published
versions
.
Page
versions:
R5
R4B
R4
R3
Codesystem-identifier-use.xml
Example
CodeSystem/identifier-use
(XML)
Raw
XML
(
canonical
form
+
also
see
XML
Format
Specification
)
Definition
for
Code
System
IdentifierUse
SystemIdentifierUse
<?xml version="1.0" encoding="UTF-8"?>
usual
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
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
<CodeSystem xmlns="http://hl7.org/fhir">
<id value="identifier-use"/>
<meta>
<lastUpdated value="2025-11-13T11:10:33.286+00:00"/>
</meta>
<text>
<status value="generated"/>
<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.
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.
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.
E.g. Changes to identifier schemes, account merges, etc.</td>
</tr> </table> </div> </text> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg"> <valueCode value="fhir"/> </extension> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status"> <valueCode value="normative"/> </extension> <url value="http://hl7.org/fhir/identifier-use"/> <identifier> <system value="urn:ietf:rfc:3986"/> <value value="urn:oid:2.16.840.1.113883.4.642.1.58"/> </identifier> <version value="6.0.0-ballot3"/> <name value="IdentifierUse"/> <title value="IdentifierUse"/> <status value="active"/> <experimental value="false"/> <date value="2025-11-13T11:10:33+00:00"/> <publisher value="HL7 International / FHIR Infrastructure"/> <contact> <telecom> <system value="url"/> <value value="http://hl7.org/fhir"/> </telecom> <telecom> <system value="email"/> <value value="fhir@lists.hl7.org"/> </telecom> </contact> <contact> <telecom> <system value="url"/> <value value="http://www.hl7.org/Special/committees/fiwg"/> </telecom> </contact> <description value="Identifies the purpose for this identifier, if known ."/> <jurisdiction> <coding> <system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/> <code value="001"/> <display value="World"/> </coding> </jurisdiction> <caseSensitive value="true"/> <valueSet value="http://hl7.org/fhir/ValueSet/identifier-use"/> <content value="complete"/> <concept> <code value="usual"/> <display value="Usual"/> <definition value="The identifier recommended for display and use in real-world interactions which
should be used when such identifier is different from the "official"
identifier."/>
</concept> <concept> <code value="official"/> <display value="Official"/> <definition value="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."/>
</concept> <concept> <code value="temp"/> <display value="Temp"/> <definition value="A temporary identifier."/> </concept> <concept> <code value="secondary"/> <display value="Secondary"/> <definition value="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."/>
</concept> <concept> <code value="old"/> <display value="Old"/>
<definition value="The identifier id no longer considered valid, but may be relevant for search purposes.
E.g. Changes to identifier schemes, account merges, etc.
E.g. Changes to identifier schemes, account merges, etc."/>
</concept>
</
CodeSystem
>
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
|
Propose
a
change