This page is part of the FHIR Specification (v1.0.2: DSTU 2). The current version which supercedes this version is

This page is part of the FHIR Specification (v1.4.0: STU 3 Ballot 3). The current version which supercedes this version is 5.0.0 . For a full list of available versions, see the Directory of published versions . For a full list of available versions, see the Directory of published versions . Page versions: . Page versions: R4B R4 R3 R2

• Using Codes Using Codes
• Code Systems Code Systems
• Value Sets v2 Tables v3 Namespaces Value Sets
• Concept Maps Concept Maps
• Identifier Systems Identifier Systems

1.25.1.3 1.30.1.3 Using LOINC with FHIR Using LOINC with FHIR

Vocabulary Vocabulary Work Group Work Group

Maturity Level : N/A Maturity Level : N/A

Ballot Status : DSTU 2 Ballot Status : DSTU 2

1.25.1.3.1 1.30.1.3.1 Summary Summary

Source	LOINC is made available by the Regenstrief Institute LOINC is made available by the Regenstrief Institute at http://loinc.org at http://loinc.org
System	The URI http://loinc.org The URI http://loinc.org identifies LOINC codes identifies LOINC codes
Version	Where a version is used, it should be the standard LOINC version e.g. 2.48 Where a version is used, it should be the standard LOINC version e.g. 2.48
Code	The LOINC Code Identifier e.g. 21176-3. LOINC codes are not case sensitive. In addition, LOINC part codes and LOINC answer string ids can be used where appropriate The LOINC Code Identifier e.g. 21176-3. LOINC codes are not case sensitive. In addition, LOINC part codes and LOINC answer string ids can be used where appropriate
Display	Use either the SHORTNAME or LONG_COMMON_NAME field for the display Use either the SHORTNAME or LONG_COMMON_NAME field for the display
Filter Properties Filter Properties	Several properties are defined as described below Several properties are defined as described below

1.25.1.3.2 1.30.1.3.2 Copyright Issues Copyright Issues The terms of use for LOINC require that a notice be included with any use of LOINC codes. This

The terms of use for LOINC require that a notice must appear in the be included with any use of LOINC codes. This notice must appear in the copyright element of any value set that includes LOINC codes (either in the code or filter elements, or in an expansion): element of any value set that includes LOINC codes (either in the code or filter elements, or in an expansion):

<copyright value="This content LOINC® is copyright © 1995 Regenstrief Institute, Inc. and the LOINC Committee, and available at no cost under the license at http://loinc.org/terms-of-use"/>
Additional
copyright
statements
may
also
be
found
in
the
copyright
element.
Some
LOINC
codes
have
3rd
party
copyright
statements.
When
these
codes
are
included
in
a
value
set,
they
must
carry
their
own

Additional copyright statements may also be found in the copyright statement as well. element. Some LOINC codes have 3rd party copyright statements. When these codes are included in a value set, they must carry their own copyright statement as well.

1.25.1.3.3 1.30.1.3.3 Case Sensitivity Case Sensitivity For comparison purposes, LOINC codes, displays, and property values are not case sensitive, though implementers SHOULD maintain the correct case when using LOINC codes and property values.

For comparison purposes, LOINC codes, displays, and property values are not case sensitive, though implementers SHOULD maintain the correct case when using LOINC codes and property values.

1.25.1.3.4 1.30.1.3.4 Use of LOINC PARTS Use of LOINC PARTS As described in the LOINC Manual

As described in the LOINC Manual section 10.2, LOINC Parts are a coded representation of a value for a dimension used to specify a LOINC Term which are assigned a non-semantic identifier with a "LP" prefix and a mod-10 check digit. Following the LOINC license, these part codes may be used in the following ways: In filter properties, as described below In Structure Definitions , where the structure describes the use of a set of LOINC codes In a section 10.2, LOINC Parts are a coded representation of a value for a dimension used to specify a LOINC Term which are assigned a non-semantic identifier with a "LP" prefix and a mod-10 check digit. Following the LOINC license, these part codes may be used in the following ways:

• In filter properties, as described below
• In Structure Definitions , where the structure describes the use of a set of LOINC codes
• In a ConceptMap resource, where mappings between LOINC codes and other codes are being defined Part codes are the same LOINC system(http://loinc.org), and SHALL be represented in uppercase (e.g. LP31755-9). resource, where mappings between LOINC codes and other codes are being defined

Part codes are the same LOINC system(http://loinc.org), and SHALL be represented in uppercase (e.g. LP31755-9).

1.25.1.3.5 1.30.1.3.5 Use of LOINC Answer Lists Use of LOINC Answer Lists LOINC also allocates Answer List and Answer String Ids for use in various forms and questionnaires. LOINC Answer String IDs are also valid LOINC codes:

LOINC also allocates Answer List and Answer String Ids for use in various forms and questionnaires. LOINC Answer String IDs are also valid LOINC codes:

  <coding>
    <system value="http://loinc.org"/>
    <code value="LA11165-0"/>
    <display value="Platelet anisocytosis"/>
  </coding>
LOINC
Answer
List
Ids
are
actually
value
set
identifiers.
See

LOINC Answer List Ids are actually value set identifiers. See below for how to use these. for how to use these.

1.25.1.3.6 1.30.1.3.6 LOINC Filter Properties LOINC Filter Properties This section documents the property filters that can be used with the LOINC code system in value set composition statements.

This section documents the property filters that can be used with the LOINC code system in value set composition statements.

1.25.1.3.6.1 1.30.1.3.6.1 LOINC Property filter LOINC Property filter

Description	Allows the selection of a set of LOINC codes with a common property value Allows the selection of a set of LOINC codes with a common property value
Property Name Property Name	One of the names listed in the "Field Name" column in LOINC Database Structure (Appendix A of the LOINC manual) One of the names listed in the "Field Name" column in LOINC Database Structure (Appendix A of the LOINC manual)
Operations Allowed Operations Allowed	= / regex = / regex
Values Allowed Values Allowed	[string value] [string value]
Comments	The 6 properties COMPONENT, PROPERTY, TIME_ASPCT, SYSTEM, SCALE_TYP, and METHOD_TYP are most likely to be useful. The 6 properties COMPONENT, PROPERTY, TIME_ASPCT, SYSTEM, SCALE_TYP, and METHOD_TYP are most likely to be useful.

1.25.1.3.6.2 1.30.1.3.6.2 3rd Party Copyright 3rd Party Copyright

Description	Allows for the inclusion or exclusion of LOINC codes that include 3rd party copyright notices Allows for the inclusion or exclusion of LOINC codes that include 3rd party copyright notices
Property Name Property Name	copyright
Operations Allowed Operations Allowed	=
Values Allowed Values Allowed	LOINC | 3rdParty LOINC | 3rdParty
Comments	LOINC = only codes with a sole copyright by Regenstrief. 3rdParty = only codes with a 3rd party copyright in addition to the one from Regenstrief. LOINC = only codes with a sole copyright by Regenstrief. 3rdParty = only codes with a 3rd party copyright in addition to the one from Regenstrief.

1.25.1.3.6.3 1.30.1.3.6.3 Multi-Axial Hierarchy Multi-Axial Hierarchy

Description	Allows for the selection of a set of codes base on their appearance in the LOINC multi-axial hierarchy Allows for the selection of a set of codes base on their appearance in the LOINC multi-axial hierarchy
Property Name Property Name	parent | ancestor parent | ancestor
Operations Allowed Operations Allowed	= / in = / in
Values Allowed Values Allowed	Part Code (or, for "in", multiple part codes separated by commas) Part Code (or, for "in", multiple part codes separated by commas)
Comments	"parent" selects immediate parents only. For example, the code "44022-2" has the parent "LP52960-9". Ancestor includes parents transitively, e.g. "LP52960-9" eventually has a parent "LP31755-9", so the code "44022-2" is in the set of codes that have ancestor=LP31755-9 "parent" selects immediate parents only. For example, the code "44022-2" has the parent "LP52960-9". Ancestor includes parents transitively, e.g. "LP52960-9" eventually has a parent "LP31755-9", so the code "44022-2" is in the set of codes that have ancestor=LP31755-9

TODO: Document Ontology TODO: Document Ontology

1.25.1.3.7 1.30.1.3.7 Implicit Value Sets Implicit Value Sets Implicit value sets are those whose specification can be predicted based on the grammar of the underlying code system, and the known structure of the URL that refers to them. LOINC defines one set of implicit value sets: By Multi-Axial Hierarchy Entry. If any value set resources exist with an identifier that conforms to the URL patterns specified below, the content of the resource must conform to the template provided. Profiles and other value set references are allowed to reference these value sets directly. todo: can LOINC actually host a service that returns these? The value set identifier http://loinc.org/vs is a value set that contains all LOINC codes.

Implicit value sets are those whose specification can be predicted based on the grammar of the underlying code system, and the known structure of the URL that refers to them. LOINC defines one set of implicit value sets: By Multi-Axial Hierarchy Entry.

If any value set resources exist with an identifier that conforms to the URL patterns specified below, the content of the resource must conform to the template provided. Profiles and other value set references are allowed to reference these value sets directly. todo: can LOINC actually host a service that returns these?

The value set identifier http://loinc.org/vs is a value set that contains all LOINC codes.

1.25.1.3.7.1 LOINC Answer List 1.30.1.3.7.1 LOINC Answer List LOINC defines a set of Answer lists, each of which contains a set of LOINC codes. LOINC answer lists are value sets. The value set identifier "http://loinc.org/vs/[id]" identifies a value set that contains a set of LOINC codes. For instance, the value set identifier http://loinc.org/vs/LL715-4 has the following definition for LOINC 2.52:

LOINC defines a set of Answer lists, each of which contains a set of LOINC codes. LOINC answer lists are value sets. The value set identifier "http://loinc.org/vs/[id]" identifies a value set that contains a set of LOINC codes. For instance, the value set identifier http://loinc.org/vs/LL715-4 has the following definition for LOINC 2.52:

<ValueSet xmlns="http://hl7.org/fhir">
  <text>
    <status value="generated"/>
    <div xmlns="http://www.w3.org/1999/xhtml">
      [some html that identifies that this value set 
      includes all LOINC codes in this answer list]
    </div>
  </text>
  <identifier value="http://loinc.org/vs/LL715-4"/>
  <version value="2.52"/>
  <name value="Platelet morph"/>
  <description value="LOINC Answer List for Platelet morph"/>
  <status value="active"/>
  <date value="[optional date of LOINC release]"/>
  <compose>
    <include>
      <system value="http://loinc.org"/>
      <concept>
        <code value="LA11165-0"/>
        <display value="Platelet anisocytosis"/>
      </concept>
      <concept>
        <code value="LA11168-4"/>
        <display value="Platelet clump"/>
      </concept>
      <concept>
        <code value="LA11167-6"/>
        <display value="Platelet large fragments"/>
      </concept>
      <concept>
        <code value="LA11166-8"/>
        <display value="Platelet satellitism"/>
      </concept>
      <concept>
        <code value="LA11169-2"/>
        <display value="Platelets.agranular"/>
      </concept>
      <concept>
        <code value="LA11170-0"/>
        <display value="Platelets.giant"/>
      </concept>
      <concept>
        <code value="LA11172-6"/>
        <display value="Platelets.large"/>
      </concept>
      <concept>
        <code value="LA11171-8"/>
        <display value="Platelets.small"/>
      </concept>
    </include>
  </compose>
</ValueSet>
Here
is
an
example
of
a
LOINC
Answer
list
used
in
a
Questionnaire
question:

Here is an example of a LOINC Answer list used in a Questionnaire question:

<question>
  <concept>
    <system value="http://loinc.org"/>
    <code value="11125-2"/>
    <display value="Plat morph Bld"/>
  </concept>
  <type value="choice"/>
  <options>
    <reference value="http://loinc.org/vs/LL715-4"/>
  </options>
</question>

1.25.1.3.7.2 1.30.1.3.7.2 Multi-Axial Hierarchy Entry Multi-Axial Hierarchy Entry A value set with an identifier of "http://loinc.org/vs/[partcode]" must conform to this template, where [partcode] is a part code from the multi-axial hierarchy:

A value set with an identifier of "http://loinc.org/vs/[partcode]" must conform to this template, where [partcode] is a part code from the multi-axial hierarchy:

<ValueSet xmlns="http://hl7.org/fhir">
  <text>
    <status value="generated"/>
    <div xmlns="http://www.w3.org/1999/xhtml">
      [some html that identifies that this value set 
      includes all LOINC codes subsumed by the identified 
      Multi-Axial Hierarchy Part Code]
    </div>
  </text>
  <identifier value="http://loinc.org/vs/[partcode]"/>
  <version value="[optional - but strongly recommended - LOINC version]"/>
  <name value="LOINC Value Set from Multi-Axial Hierarchy code [partcode]"/>
  <description value="All LOINC codes for [partcode or name]"/>
  <status value="active"/>
  <date value="[optional date of LOINC release]"/>
  <compose>
    <include>
      <system value="http://loinc.org"/>
      <filter>
        <property value="ancestor"/>
        <op value="="/>
        <value value="[partcode]"/>
      </filter>
    </include>
  </compose>
</ValueSet>
©
HL7.org
2011+.
FHIR
DSTU2
(v1.0.2-7202)
generated
on
Sat,
Oct
24,
2015
07:44+1100.
Links:
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