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

## : Interpretation Codes (2.8.1 - 2.1.0) - JSON Representation

Active as of 2026-03-13

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    {
      "resourceType" : "CodeSystem",
      "id" : "observationInterpretation",
      "text" : {
        "status" : "generated",
        "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><ul><li>Include all codes defined in <a href=\"CodeSystem-observationInterpretation.html\"><code>http://terminology.hl7.org/v2plusvocab/CodeSystem/observationInterpretation</code></a></li></ul></div>"
      },
      "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" : "0078"
        }
      ],
      "url" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/observationInterpretation",
      "identifier" : [
        {
          "system" : "urn:ietf:rfc:3986",
          "value" : "urn:oid:2.16.840.1.113883.5.83"
        },
        {
          "system" : "urn:ietf:rfc:3986",
          "value" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/v2-0078"
        }
      ],
      "version" : "2.1.0",
      "name" : "ObservationInterpretation",
      "title" : "Interpretation Codes (2.8.1 - 2.1.0)",
      "status" : "active",
      "experimental" : true,
      "date" : "2026-03-13T11:11:38+00:00",
      "publisher" : "HL7/FO",
      "contact" : [
        {
          "name" : "HL7/FO",
          "telecom" : [
            {
              "system" : "url",
              "value" : "http://www.hl7.org"
            }
          ]
        }
      ],
      "description" : "HL7-defined code system of concepts which specify a categorical assessment of an observation value.  Used in HL7 Version 2.x messaging in the OBX segment.\r\nNotes: This is being communicated in v2.x in OBX-8, in v3 in ObservationInterpretation (CWE) in R1 (Representative Realm) and in FHIR Observation.interpretation.",
      "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" : "<",
          "display" : "Below absolute low-off instrument scale",
          "definition" : "Below absolute low-off instrument scale",
          "designation" : [
            {
              "language" : "de",
              "value" : "Unter Meßbereich (Extremwertverletzung)"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            }
          ]
        },
        {
          "code" : ">",
          "display" : "Above absolute high-off instrument scale",
          "definition" : "Above absolute high-off instrument scale",
          "designation" : [
            {
              "language" : "de",
              "value" : "Über Meßbereich (Extremwertverletzung)"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.2"
            }
          ]
        },
        {
          "code" : "A",
          "display" : "Abnormal (applies to non-numeric results)",
          "definition" : "Abnormal (applies to non-numeric results)",
          "designation" : [
            {
              "language" : "de",
              "value" : "anormal (nicht numerisch)"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            }
          ]
        },
        {
          "code" : "AA",
          "display" : "Very abnormal",
          "definition" : "Very abnormal (applies to non-numeric units, analogous to panic limits for numeric units)",
          "designation" : [
            {
              "language" : "de",
              "value" : "Pathologisch (nicht numerisch)"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            }
          ]
        },
        {
          "code" : "AC",
          "display" : "Anti-complementary substances present",
          "definition" : "Anti-complementary substances present",
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.7"
            }
          ]
        },
        {
          "code" : "B",
          "display" : "Better",
          "definition" : "Better (use when direction not relevant)",
          "designation" : [
            {
              "language" : "de",
              "value" : "Verbesserung"
            }
          ],
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2025-08-02"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.2"
            }
          ]
        },
        {
          "code" : "D",
          "display" : "Significant change down",
          "definition" : "Significant change down",
          "designation" : [
            {
              "language" : "de",
              "value" : "Deutlicher Trend nach unten"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            }
          ]
        },
        {
          "code" : "DET",
          "display" : "Detected",
          "definition" : "Detected",
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.7"
            }
          ]
        },
        {
          "code" : "H",
          "display" : "Above high normal",
          "definition" : "Above high normal",
          "designation" : [
            {
              "language" : "de",
              "value" : "Oberhalb oberer Grenze Referenzbereich"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            }
          ]
        },
        {
          "code" : "HH",
          "display" : "Above upper panic limits",
          "definition" : "Above upper panic limits",
          "designation" : [
            {
              "language" : "de",
              "value" : "Oberhalb oberer pathologischer Grenze"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            }
          ]
        },
        {
          "code" : "HM",
          "display" : "Hold for Medical Review",
          "definition" : "Hold for Medical Review",
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.8"
            }
          ]
        },
        {
          "code" : "I",
          "display" : "Intermediate",
          "definition" : "Intermediate. Indicates for microbiology susceptibilities only.",
          "designation" : [
            {
              "language" : "de",
              "value" : "Intermediär"
            }
          ],
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2025-08-02"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            }
          ]
        },
        {
          "code" : "IND",
          "display" : "Indeterminate",
          "definition" : "Indeterminate",
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.7"
            }
          ]
        },
        {
          "code" : "L",
          "display" : "Below low normal",
          "definition" : "Below low normal",
          "designation" : [
            {
              "language" : "de",
              "value" : "Unterhalb unterer Grenze Referenzbereich"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.2"
            }
          ]
        },
        {
          "code" : "LL",
          "display" : "Below lower panic limits",
          "definition" : "Below lower panic limits",
          "designation" : [
            {
              "language" : "de",
              "value" : "Unterhalb unterer pathologischer Grenze"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            }
          ]
        },
        {
          "code" : "MS",
          "display" : "Moderately susceptible",
          "definition" : "Moderately susceptible. Indicates for microbiology susceptibilities only.",
          "designation" : [
            {
              "language" : "de",
              "value" : "mäßig empfindlich"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            }
          ]
        },
        {
          "code" : "N",
          "display" : "Normal",
          "definition" : "Normal (applies to non-numeric results)",
          "designation" : [
            {
              "language" : "de",
              "value" : "Normal (nicht numerisch)"
            }
          ],
          "property" : [
            {
              "code" : "comment",
              "valueString" : "applies to non-numeric results"
            },
            {
              "code" : "modified",
              "valueDateTime" : "2025-08-02"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.2"
            }
          ]
        },
        {
          "code" : "ND",
          "display" : "Not Detected",
          "definition" : "Not Detected",
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.7"
            }
          ]
        },
        {
          "code" : "NEG",
          "display" : "Negative",
          "definition" : "Negative",
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.7"
            }
          ]
        },
        {
          "code" : "NR",
          "display" : "Non-reactive",
          "definition" : "Non-reactive",
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.7"
            }
          ]
        },
        {
          "code" : "OBX",
          "display" : "Interpretation qualifiers in separate OBX segments",
          "definition" : "Interpretation qualifiers in separate OBX segments",
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.8"
            }
          ]
        },
        {
          "code" : "POS",
          "display" : "Positive",
          "definition" : "Positive",
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.7"
            }
          ]
        },
        {
          "code" : "QCF",
          "display" : "Quality Control Failure",
          "definition" : "Quality Control Failure",
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.7"
            }
          ]
        },
        {
          "code" : "R",
          "display" : "Resistant",
          "definition" : "Resistant. Indicates for microbiology susceptibilities only.",
          "designation" : [
            {
              "language" : "de",
              "value" : "Resistent"
            }
          ],
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2025-08-02"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            }
          ]
        },
        {
          "code" : "RR",
          "display" : "Reactive",
          "definition" : "Reactive",
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.7"
            }
          ]
        },
        {
          "code" : "S",
          "display" : "Susceptible",
          "definition" : "Susceptible. Indicates for microbiology susceptibilities only.",
          "designation" : [
            {
              "language" : "de",
              "value" : "Empfindlich"
            }
          ],
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2025-08-02"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            }
          ]
        },
        {
          "code" : "TOX",
          "display" : "Cytotoxic substance present",
          "definition" : "Cytotoxic substance present",
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.7"
            }
          ]
        },
        {
          "code" : "U",
          "display" : "Significant change up",
          "definition" : "Significant change up",
          "designation" : [
            {
              "language" : "de",
              "value" : "Deutlicher Trend nach oben"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            }
          ]
        },
        {
          "code" : "VS",
          "display" : "Very susceptible",
          "definition" : "Very susceptible. Indicates for microbiology susceptibilities only.",
          "designation" : [
            {
              "language" : "de",
              "value" : "Sehr empfindlich"
            }
          ],
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2025-08-02"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            }
          ]
        },
        {
          "code" : "W",
          "display" : "Worse",
          "definition" : "Worse-use when direction not relevant",
          "designation" : [
            {
              "language" : "de",
              "value" : "Verschlechterung"
            }
          ],
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2025-08-02"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.2"
            }
          ]
        },
        {
          "code" : "WR",
          "display" : "Weakly reactive",
          "definition" : "Weakly reactive",
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.7"
            }
          ]
        },
        {
          "code" : "null",
          "display" : "No range defined, or normal ranges don't apply",
          "definition" : "No range defined, or normal ranges don't apply",
          "designation" : [
            {
              "language" : "de",
              "value" : "Kein Referenzbereich / Referenzbereich nicht anwendbar"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            }
          ]
        }
      ]
    }