HL7 v2.4 Vocabulary
0.1.0 - ci-build

HL7 v2.4 Vocabulary, published by HL7/FO. This guide is not an authorized publication; it is the continuous build for version 0.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/frankoemig/hl7.v2.terminology.v24/ and changes regularly. See the Directory of published versions

## : Coding System (2.4 - 1.0.0) - XML Representation

Active as of 2026-01-27

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    <CodeSystem xmlns="http://hl7.org/fhir">
      <id value="codingSystem"/>
      <text>
        <status value="generated"/>
        <div xmlns="http://www.w3.org/1999/xhtml"><ul><li>Include all codes defined in <a href="CodeSystem-codingSystem.html"><code>http://terminology.hl7.org/v2plusvocab/CodeSystem/codingSystem</code></a></li></ul></div>
      </text>
      <extension
                 url="http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-v2versionCreated">
        <valueString value="2.4"/>
      </extension>
      <extension
                 url="http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-versionHistory">
        <valueString value="generate correct history somehow"/>
      </extension>
      <extension
                 url="http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-tableNo">
        <valueString value="0396"/>
      </extension>
      <url
           value="http://terminology.hl7.org/v2plusvocab/CodeSystem/codingSystem"/>
      <identifier>
        <system value="urn:ietf:rfc:3986"/>
        <value value="urn:oid:2.16.840.1.113883.18.247"/>
      </identifier>
      <version value="1.0.0"/>
      <name value="CodingSystem"/>
      <title value="Coding System (2.4 - 1.0.0)"/>
      <status value="active"/>
      <experimental value="true"/>
      <date value="2026-01-27T19:23:17+00:00"/>
      <publisher value="HL7/FO"/>
      <contact>
        <name value="HL7/FO"/>
        <telecom>
          <system value="url"/>
          <value value="http://www.hl7.org"/>
        </telecom>
      </contact>
      <description
                   value="HL7-defined code system of concepts specifying the coding system.  This table is maintained outside of the published Version 2 standards, and may be found at http://www.hl7.org/Special/committees/vocab/table_0396/index.cfm.  Used in HL7 Version 2.x messaging in the CWE segment."/>
      <copyright value="HL7 Inc., 2026"/>
      <caseSensitive value="true"/>
      <compositional value="false"/>
      <content value="complete"/>
      <property>
        <code value="versionIntroduced"/>
        <uri
             value="http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionIntroduced"/>
        <description value="version when was this code introduced"/>
        <type value="string"/>
      </property>
      <property>
        <code value="versionDeprecated"/>
        <uri
             value="http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionDeprecated"/>
        <description value="version when was this code deprecated"/>
        <type value="string"/>
      </property>
      <property>
        <code value="status"/>
        <uri value="http://hl7.org/fhir/concept-properties#status"/>
        <description
                     value="A code that indicates the status of the concept. Typical values are active, experimental, deprecated, and retired"/>
        <type value="code"/>
      </property>
      <property>
        <code value="comment"/>
        <uri
             value="http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#comment"/>
        <description
                     value="A string that provides additional detail pertinent to the use or understanding of the concept"/>
        <type value="string"/>
      </property>
      <property>
        <code value="usage"/>
        <uri
             value="http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#usage"/>
        <description value="usage notes for this code"/>
        <type value="string"/>
      </property>
      <property>
        <code value="modified"/>
        <uri
             value="http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#modified"/>
        <description value="date of last modification"/>
        <type value="dateTime"/>
      </property>
      <property>
        <code value="category"/>
        <uri
             value="http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#category"/>
        <description value="category"/>
        <type value="string"/>
      </property>
      <property>
        <code value="country"/>
        <uri
             value="http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#country"/>
        <description value="country"/>
        <type value="string"/>
      </property>
      <concept>
        <code value="99zzz"/>
        <display value="Local general code where z is an alphanumeric character"/>
        <definition
                    value="Local general code where z is an alphanumeric character"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Locally defined codes for purpose of sender or receiver - 99zzz (where z is an alphanumeric character)."/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2024-08-09"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="ACR"/>
        <display value="American College of Radiology finding codes"/>
        <definition value="American College of Radiology finding codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="ART"/>
        <display value="WHO Adverse Reaction Terms"/>
        <definition value="WHO Adverse Reaction Terms"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="AS4"/>
        <display value="ASTM E1238/ E1467 Universal"/>
        <definition value="ASTM E1238/ E1467 Universal"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="AS4E"/>
        <display value="AS4 Neurophysiology Codes"/>
        <definition value="AS4 Neurophysiology Codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="ATC"/>
        <display value="American Type Culture Collection"/>
        <definition value="American Type Culture Collection"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="C4"/>
        <display value="CPT-4"/>
        <definition value="CPT-4"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="C5"/>
        <display value="CPT-5"/>
        <definition value="CPT-5"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="CAS"/>
        <display value="Chemical abstract codes"/>
        <definition value="Chemical abstract codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="CD2"/>
        <display value="CDT-2 Codes"/>
        <definition value="CDT-2 Codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="CDCA"/>
        <display value="CDC Analyte Codes"/>
        <definition value="CDC Analyte Codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
        <property>
          <code value="country"/>
          <valueString value="US"/>
        </property>
      </concept>
      <concept>
        <code value="CDCM"/>
        <display value="CDC Methods/Instruments Codes"/>
        <definition value="CDC Methods/Instruments Codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
        <property>
          <code value="country"/>
          <valueString value="US"/>
        </property>
      </concept>
      <concept>
        <code value="CDS"/>
        <display value="CDC Surveillance"/>
        <definition value="CDC Surveillance"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="CE"/>
        <display value="CEN ECG diagnostic codes"/>
        <definition value="CEN ECG diagnostic codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="CLP"/>
        <display value="CLIP"/>
        <definition value="CLIP"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="CPTM"/>
        <display value="CPT Modifier Code"/>
        <definition value="CPT Modifier Code"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="CST"/>
        <display value="COSTART"/>
        <definition value="COSTART"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="CVX"/>
        <display value="CDC Vaccine Codes"/>
        <definition value="CDC Vaccine Codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="DCL"/>
        <display value="DICOM Class Label"/>
        <definition value="DICOM Class Label"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="DCM"/>
        <display value="DICOM modality codes"/>
        <definition value="DICOM modality codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="DQL"/>
        <display value="DICOM Query Label"/>
        <definition value="DICOM Query Label"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="E"/>
        <display value="EUCLIDES"/>
        <definition value="EUCLIDES"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="E5"/>
        <display value="Euclides  quantity codes"/>
        <definition value="Euclides  quantity codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="E6"/>
        <display value="Euclides Lab method codes"/>
        <definition value="Euclides Lab method codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="E7"/>
        <display value="Euclides Lab equipment codes"/>
        <definition value="Euclides Lab equipment codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="ENZC"/>
        <display value="Enzyme Codes"/>
        <definition value="Enzyme Codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="FDDC"/>
        <display value="First DataBank Drug Codes"/>
        <definition value="First DataBank Drug Codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="FDDX"/>
        <display value="First DataBank Diagnostic Codes"/>
        <definition value="First DataBank Diagnostic Codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="FDK"/>
        <display value="FDA K10"/>
        <definition value="FDA K10"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="HB"/>
        <display value="HIBCC"/>
        <definition value="HIBCC"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="HCPCS"/>
        <display value="HCFA Common Procedure Coding System"/>
        <definition value="HCFA Common Procedure Coding System"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="HHC"/>
        <display value="Home Health Care"/>
        <definition value="Home Health Care"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="HI"/>
        <display value="Health Outcomes"/>
        <definition value="Health Outcomes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="HL7nnnn"/>
        <display value="HL7 Defined Codes where nnnn is the HL7 table number"/>
        <definition value="HL7 Defined Codes where nnnn is the HL7 table number"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="HPC"/>
        <display value="HCFA Procedure Codes (HCPCS)"/>
        <definition value="HCFA Procedure Codes (HCPCS)"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="I10"/>
        <display value="ICD-10"/>
        <definition value="ICD-10"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="I10P"/>
        <display value="ICD-10  Procedure Codes"/>
        <definition value="ICD-10  Procedure Codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="I9"/>
        <display value="ICD9"/>
        <definition value="ICD9"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="I9C"/>
        <display value="ICD-9CM"/>
        <definition value="ICD-9CM"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="IBT"/>
        <display value="ISBT"/>
        <definition value="ISBT"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="IC2"/>
        <display value="ICHPPC-2"/>
        <definition value="ICHPPC-2"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="ICDO"/>
        <display value="International Classification of Diseases for Oncology"/>
        <definition
                    value="International Classification of Diseases for Oncology"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="ICS"/>
        <display value="ICCS"/>
        <definition value="ICCS"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="ICSD"/>
        <display value="International Classification of Sleep Disorders"/>
        <definition value="International Classification of Sleep Disorders"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="ISOnnnn"/>
        <display value="ISO Defined Codes where nnnn is the ISO table number"/>
        <definition value="ISO Defined Codes where nnnn is the ISO table number"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="IUPC"/>
        <display value="IUPAC/IFCC Component Codes"/>
        <definition value="IUPAC/IFCC Component Codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="IUPP"/>
        <display value="IUPAC/IFCC Property Codes"/>
        <definition value="IUPAC/IFCC Property Codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="JC8"/>
        <display value="Japanese Chemistry"/>
        <definition value="Japanese Chemistry"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="L"/>
        <display value="Local general code"/>
        <definition value="Local general code"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Locally defined codes for purpose of sender or receiver. Local codes can be identified by L (for backward compatibility)"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2024-08-09"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="LB"/>
        <display value="Local billing code"/>
        <definition value="Local billing code"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="LN"/>
        <display
                 value="Logical Observation Identifier Names and Codes (LOINC(r))"/>
        <definition
                    value="Logical Observation Identifier Names and Codes (LOINC(r))"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="MCD"/>
        <display value="Medicaid"/>
        <definition value="Medicaid"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="MCR"/>
        <display value="Medicare"/>
        <definition value="Medicare"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="MDDX"/>
        <display value="Medispan Diagnostic Codes"/>
        <definition value="Medispan Diagnostic Codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="MEDC"/>
        <display value="Medical Economics Drug Codes"/>
        <definition value="Medical Economics Drug Codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="MEDR"/>
        <display value="Medical Dictionary for Drug Regulatory Affairs (MEDDRA)"/>
        <definition
                    value="Medical Dictionary for Drug Regulatory Affairs (MEDDRA)"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="MEDX"/>
        <display value="Medical Economics Diagnostic Codes"/>
        <definition value="Medical Economics Diagnostic Codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="MGPI"/>
        <display value="Medispan GPI"/>
        <definition value="Medispan GPI"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="MVX"/>
        <display value="CDC Vaccine Manufacturer Codes"/>
        <definition value="CDC Vaccine Manufacturer Codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="NDA"/>
        <display value="NANDA"/>
        <definition value="NANDA"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="NDC"/>
        <display value="National drug codes"/>
        <definition value="National drug codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="NIC"/>
        <display value="Nursing Interventions Classification"/>
        <definition value="Nursing Interventions Classification"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="NPI"/>
        <display value="National Provider Identifier"/>
        <definition value="National Provider Identifier"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="OHA"/>
        <display value="Omaha System"/>
        <definition value="Omaha System"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="POS"/>
        <display value="POS Codes"/>
        <definition value="POS Codes"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="RC"/>
        <display value="Read Classification"/>
        <definition value="Read Classification"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="SDM"/>
        <display value="SNOMED- DICOM Microglossary"/>
        <definition value="SNOMED- DICOM Microglossary"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="SNM"/>
        <display value="Systemized Nomenclature of Medicine (SNOMED)"/>
        <definition value="Systemized Nomenclature of Medicine (SNOMED)"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="SNM3"/>
        <display value="SNOMED International"/>
        <definition value="SNOMED International"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="SNT"/>
        <display value="SNOMED topology codes (anatomic sites)"/>
        <definition value="SNOMED topology codes (anatomic sites)"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="UC"/>
        <display value="UCDS"/>
        <definition value="UCDS"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="UMD"/>
        <display value="MDNS"/>
        <definition value="MDNS"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="UML"/>
        <display value="Unified Medical Language"/>
        <definition value="Unified Medical Language"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="UPC"/>
        <display value="Universal Product Code"/>
        <definition value="Universal Product Code"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="UPIN"/>
        <display value="UPIN"/>
        <definition value="UPIN"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="W1"/>
        <display value="WHO record # drug codes (6 digit)"/>
        <definition value="WHO record # drug codes (6 digit)"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="W2"/>
        <display value="WHO record # drug codes (8 digit)"/>
        <definition value="WHO record # drug codes (8 digit)"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="W4"/>
        <display value="WHO record # code with ASTM extension"/>
        <definition value="WHO record # code with ASTM extension"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
      <concept>
        <code value="WC"/>
        <display value="WHO ATC"/>
        <definition value="WHO ATC"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.4"/>
        </property>
      </concept>
    </CodeSystem>