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Source1

{
  "resourceType": "CodeSystem",
  "id": "natureOfServiceTestObservation",
  "text": {
    "status": "generated",
    "div": "<!-- snip (see above) -->"
  },
  "extension": [
    {
      "url": "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-v2versionCreated",
      "valueString": "2.8.1"
    },
    {
      "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 - 1.1.0)",
  "status": "active",
  "experimental": true,
  "date": "2026-01-27T19:45:38+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"
        }
      ]
    }
  ]
}