HL7 v2.9.1 Vocabulary
0.2.0 - ci-build

HL7 v2.9.1 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.v291/ and changes regularly. See the Directory of published versions

## : Duration Categories (2.9.1 - 1.2.0) - JSON Representation

Active as of 2026-03-13

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    {
      "resourceType" : "CodeSystem",
      "id" : "durationCategories",
      "text" : {
        "status" : "generated",
        "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><ul><li>Include all codes defined in <a href=\"CodeSystem-durationCategories.html\"><code>http://terminology.hl7.org/v2plusvocab/CodeSystem/durationCategories</code></a></li></ul></div>"
      },
      "extension" : [
        {
          "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-v2versionCreated",
          "valueString" : "2.9.1"
        },
        {
          "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-versionHistory",
          "valueString" : "generate correct history somehow"
        },
        {
          "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-tableNo",
          "valueString" : "0255"
        }
      ],
      "url" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/durationCategories",
      "identifier" : [
        {
          "system" : "urn:ietf:rfc:3986",
          "value" : "urn:oid:2.16.840.1.113883.18.150"
        },
        {
          "system" : "urn:ietf:rfc:3986",
          "value" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/v2-0255"
        }
      ],
      "version" : "1.2.0",
      "name" : "DurationCategories",
      "title" : "Duration Categories (2.9.1 - 1.2.0)",
      "status" : "active",
      "experimental" : true,
      "date" : "2026-03-13T11:04:57+00:00",
      "publisher" : "HL7/FO",
      "contact" : [
        {
          "name" : "HL7/FO",
          "telecom" : [
            {
              "system" : "url",
              "value" : "http://www.hl7.org"
            }
          ]
        }
      ],
      "description" : "Code system of concepts used to classify an observation definition as intended to measure a patient's state at a point in time.  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" : [
        {
          "id" : "2486",
          "code" : "*",
          "display" : "(asterisk) Life of the \"unit\"",
          "definition" : "(asterisk) Life of the \"unit\"",
          "property" : [
            {
              "code" : "comment",
              "valueString" : "Used for blood products."
            },
            {
              "code" : "usage",
              "valueString" : "Deprecated March 2016; use code LU instead."
            },
            {
              "code" : "status",
              "valueCode" : "inactive"
            },
            {
              "code" : "modified",
              "valueDateTime" : "2016-03-12"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2497",
          "code" : "12H",
          "display" : "12 hours",
          "definition" : "12 hours",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2488",
          "code" : "1H",
          "display" : "1 hour",
          "definition" : "1 hour",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2508",
          "code" : "1L",
          "display" : "1 months (30 days)",
          "definition" : "1 months (30 days)",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2504",
          "code" : "1W",
          "display" : "1 week",
          "definition" : "1 week",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2490",
          "code" : "2.5H",
          "display" : "2 1/2 hours",
          "definition" : "2 1/2 hours",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2498",
          "code" : "24H",
          "display" : "24 hours",
          "definition" : "24 hours",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2499",
          "code" : "2D",
          "display" : "2 days",
          "definition" : "2 days",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2489",
          "code" : "2H",
          "display" : "2 hours",
          "definition" : "2 hours",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2509",
          "code" : "2L",
          "display" : "2 months",
          "definition" : "2 months",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2505",
          "code" : "2W",
          "display" : "2 weeks",
          "definition" : "2 weeks",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2487",
          "code" : "30M",
          "display" : "30 minutes",
          "definition" : "30 minutes",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2500",
          "code" : "3D",
          "display" : "3 days",
          "definition" : "3 days",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2491",
          "code" : "3H",
          "display" : "3 hours",
          "definition" : "3 hours",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2510",
          "code" : "3L",
          "display" : "3 months",
          "definition" : "3 months",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2506",
          "code" : "3W",
          "display" : "3 weeks",
          "definition" : "3 weeks",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2501",
          "code" : "4D",
          "display" : "4 days",
          "definition" : "4 days",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2492",
          "code" : "4H",
          "display" : "4 hours",
          "definition" : "4 hours",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2507",
          "code" : "4W",
          "display" : "4 weeks",
          "definition" : "4 weeks",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2502",
          "code" : "5D",
          "display" : "5 days",
          "definition" : "5 days",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2493",
          "code" : "5H",
          "display" : "5 hours",
          "definition" : "5 hours",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2503",
          "code" : "6D",
          "display" : "6 days",
          "definition" : "6 days",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2494",
          "code" : "6H",
          "display" : "6 hours",
          "definition" : "6 hours",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2495",
          "code" : "7H",
          "display" : "7 hours",
          "definition" : "7 hours",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2496",
          "code" : "8H",
          "display" : "8 hours",
          "definition" : "8 hours",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2015-07-13"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "id" : "2511",
          "code" : "LU",
          "display" : "Life of the \"unit\"",
          "definition" : "Life of the \"unit\" (for blood products).",
          "property" : [
            {
              "code" : "usage",
              "valueString" : "In a master file update for blood products, no specific duration value can be specified (see OM1-43 “Point Versus Interval” field definition)."
            },
            {
              "code" : "modified",
              "valueDateTime" : "2016-03-16"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.9"
            }
          ]
        },
        {
          "id" : "2512",
          "code" : "PT",
          "display" : "point in time",
          "definition" : "To identify measures at a point in time.",
          "property" : [
            {
              "code" : "modified",
              "valueDateTime" : "2016-07-06"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        }
      ]
    }