HL7 v2.8.1 Vocabulary
0.2.0 - ci-build

HL7 v2.8.1 Vocabulary, published by HL7/FO. This guide is not an authorized publication; it is the continuous build for version 0.2.0 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.v281/ and changes regularly. See the Directory of published versions

## : Nature of Service/Test/Observation (2.8.1 - 1.1.0) - XML Representation

Active as of 2026-03-13

Raw xml | Download

    <CodeSystem xmlns="http://hl7.org/fhir">
      <id value="natureOfServiceTestObservation"/>
      <text>
        <status value="generated"/>
        <div xmlns="http://www.w3.org/1999/xhtml"><ul><li>Include all codes defined in <a href="CodeSystem-natureOfServiceTestObservation.html"><code>http://terminology.hl7.org/v2plusvocab/CodeSystem/natureOfServiceTestObservation</code></a></li></ul></div>
      </text>
      <extension
                 url="http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-v2versionCreated">
        <valueString value="2.8.1"/>
      </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="0174"/>
      </extension>
      <url
           value="http://terminology.hl7.org/v2plusvocab/CodeSystem/natureOfServiceTestObservation"/>
      <identifier>
        <system value="urn:ietf:rfc:3986"/>
        <value value="urn:oid:2.16.840.1.113883.18.90"/>
      </identifier>
      <identifier>
        <system value="urn:ietf:rfc:3986"/>
        <value value="http://terminology.hl7.org/v2plusvocab/CodeSystem/v2-0174"/>
      </identifier>
      <version value="1.1.0"/>
      <name value="NatureOfServiceTestObservation"/>
      <title value="Nature of Service/Test/Observation (2.8.1 - 1.1.0)"/>
      <status value="active"/>
      <experimental value="true"/>
      <date value="2026-03-13T11:11:38+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="Code system of concepts specifying an identification of a test battery, an entire functional procedure or study, a single test value (observation), multiple test batteries or functional procedures as an orderable unit (profile), or a single test value (observation) calculated from other independent observations, typically used as an indicator for Master Files.  Used in HL7 Version 2.x messaging in the OM1 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>
      <concept>
        <code value="A"/>
        <display value="Atomic service/test/observation"/>
        <definition
                    value="Atomic service/test/observation (test code or treatment code)"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="can be associated with one or more OM4 (specimen) segments&lt;p&gt;a single direct observation and would usually be associated with an OM2 and/or OM3 segments"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2025-08-02"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.2"/>
        </property>
      </concept>
      <concept>
        <code value="C"/>
        <display value="Single observation, calculated"/>
        <definition
                    value="Single observation calculated via a rule or formula from other independent observations (e.g., Alveolar-arterial ratio, cardiac output)"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="can be associated with one or more OM4 (specimen) segments&lt;p&gt;a derived quantity and would usually be associated with an OM6 segment"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2025-08-02"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.2"/>
        </property>
      </concept>
      <concept>
        <code value="F"/>
        <display value="Functional procedure"/>
        <definition
                    value="Functional procedure that may consist of one or more interrelated measures (e.g., glucose tolerance test, creatinine clearance), usually done at different times and/or on different specimens"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="can be associated with one or more OM4 (specimen) segments&lt;p&gt;See comment for value S"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2025-08-02"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.2"/>
        </property>
      </concept>
      <concept>
        <code value="P"/>
        <display value="Profile or battery"/>
        <definition
                    value="Profile or battery consisting of many independent atomic observations (e.g., SMA12, electrolytes), usually done at one instrument on one specimen"/>
        <designation>
          <language value="de"/>
          <value value="Batterieanordnung"/>
        </designation>
        <property>
          <code value="usage"/>
          <valueString
                       value="can be associated with one or more OM4 (specimen) segments&lt;p&gt;See comment for value S"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2025-08-02"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.2"/>
        </property>
      </concept>
      <concept>
        <code value="S"/>
        <display value="Superset-a set of batteries or procedures"/>
        <definition
                    value="Superset-a set of batteries or procedures ordered under a single code unit but processed as separate batteries (e.g., routines = CBC, UA, electrolytes)&lt;p&gt;This set indicates that the code being described is used to order multiple service/test/observation b"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="can be associated with one or more OM4 (specimen) segments&lt;p&gt;Codes P, F, and S identify sets (batteries) and should be associated with an OM5 segment that defines the list of elements.  The definitions for the contained elements would have to be sent in o"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2025-08-02"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.2"/>
        </property>
      </concept>
    </CodeSystem>