HL7 v2.8 Vocabulary
0.1.0 - ci-build

HL7 v2.8 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.v28/ and changes regularly. See the Directory of published versions

## : Nature of Service/Test/Observation (2.8 - 1.1.0) - JSON Representation

Active as of 2026-01-27

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    {
      "resourceType" : "CodeSystem",
      "id" : "natureOfServiceTestObservation",
      "text" : {
        "status" : "generated",
        "div" : "<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>"
      },
      "extension" : [
        {
          "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-v2versionCreated",
          "valueString" : "2.8"
        },
        {
          "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-versionHistory",
          "valueString" : "generate correct history somehow"
        },
        {
          "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-tableNo",
          "valueString" : "0174"
        }
      ],
      "url" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/natureOfServiceTestObservation",
      "identifier" : [
        {
          "system" : "urn:ietf:rfc:3986",
          "value" : "urn:oid:2.16.840.1.113883.18.90"
        }
      ],
      "version" : "1.1.0",
      "name" : "NatureOfServiceTestObservation",
      "title" : "Nature of Service/Test/Observation (2.8 - 1.1.0)",
      "status" : "active",
      "experimental" : true,
      "date" : "2026-01-27T19:37:03+00:00",
      "publisher" : "HL7/FO",
      "contact" : [
        {
          "name" : "HL7/FO",
          "telecom" : [
            {
              "system" : "url",
              "value" : "http://www.hl7.org"
            }
          ]
        }
      ],
      "description" : "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" : "HL7 Inc., 2026",
      "caseSensitive" : true,
      "compositional" : false,
      "content" : "complete",
      "property" : [
        {
          "code" : "versionIntroduced",
          "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionIntroduced",
          "description" : "version when was this code introduced",
          "type" : "string"
        },
        {
          "code" : "versionDeprecated",
          "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionDeprecated",
          "description" : "version when was this code deprecated",
          "type" : "string"
        },
        {
          "code" : "status",
          "uri" : "http://hl7.org/fhir/concept-properties#status",
          "description" : "A code that indicates the status of the concept. Typical values are active, experimental, deprecated, and retired",
          "type" : "code"
        },
        {
          "code" : "comment",
          "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#comment",
          "description" : "A string that provides additional detail pertinent to the use or understanding of the concept",
          "type" : "string"
        },
        {
          "code" : "usage",
          "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#usage",
          "description" : "usage notes for this code",
          "type" : "string"
        },
        {
          "code" : "modified",
          "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#modified",
          "description" : "date of last modification",
          "type" : "dateTime"
        }
      ],
      "concept" : [
        {
          "code" : "A",
          "display" : "Atomic service/test/observation",
          "definition" : "Atomic service/test/observation (test code or treatment code)",
          "property" : [
            {
              "code" : "usage",
              "valueString" : "can be associated with one or more OM4 (specimen) segments<p>a single direct observation and would usually be associated with an OM2 and/or OM3 segments"
            },
            {
              "code" : "modified",
              "valueDateTime" : "2025-08-02"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.2"
            }
          ]
        },
        {
          "code" : "C",
          "display" : "Single observation, calculated",
          "definition" : "Single observation calculated via a rule or formula from other independent observations (e.g., Alveolar-arterial ratio, cardiac output)",
          "property" : [
            {
              "code" : "usage",
              "valueString" : "can be associated with one or more OM4 (specimen) segments<p>a derived quantity and would usually be associated with an OM6 segment"
            },
            {
              "code" : "modified",
              "valueDateTime" : "2025-08-02"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.2"
            }
          ]
        },
        {
          "code" : "F",
          "display" : "Functional procedure",
          "definition" : "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" : "usage",
              "valueString" : "can be associated with one or more OM4 (specimen) segments<p>See comment for value S"
            },
            {
              "code" : "modified",
              "valueDateTime" : "2025-08-02"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.2"
            }
          ]
        },
        {
          "code" : "P",
          "display" : "Profile or battery",
          "definition" : "Profile or battery consisting of many independent atomic observations (e.g., SMA12, electrolytes), usually done at one instrument on one specimen",
          "designation" : [
            {
              "language" : "de",
              "value" : "Batterieanordnung"
            }
          ],
          "property" : [
            {
              "code" : "usage",
              "valueString" : "can be associated with one or more OM4 (specimen) segments<p>See comment for value S"
            },
            {
              "code" : "modified",
              "valueDateTime" : "2025-08-02"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.2"
            }
          ]
        },
        {
          "code" : "S",
          "display" : "Superset-a set of batteries or procedures",
          "definition" : "Superset-a set of batteries or procedures ordered under a single code unit but processed as separate batteries (e.g., routines = CBC, UA, electrolytes)<p>This set indicates that the code being described is used to order multiple service/test/observation b",
          "property" : [
            {
              "code" : "usage",
              "valueString" : "can be associated with one or more OM4 (specimen) segments<p>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"
            },
            {
              "code" : "modified",
              "valueDateTime" : "2025-08-02"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.2"
            }
          ]
        }
      ]
    }