HL7 v2.1 Vocabulary
0.1.0 - ci-build

HL7 v2.1 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.v21/ and changes regularly. See the Directory of published versions

## : Event (2.1 - 1.0.0) - JSON Representation

Active as of 2026-01-27

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    {
      "resourceType" : "CodeSystem",
      "id" : "event",
      "text" : {
        "status" : "generated",
        "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><ul><li>Include all codes defined in <a href=\"CodeSystem-event.html\"><code>http://terminology.hl7.org/v2plusvocab/CodeSystem/event</code></a></li></ul></div>"
      },
      "extension" : [
        {
          "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-v2versionCreated",
          "valueString" : "2.1"
        },
        {
          "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-versionHistory",
          "valueString" : "generate correct history somehow"
        },
        {
          "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-tableNo",
          "valueString" : "0003"
        }
      ],
      "url" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/event",
      "identifier" : [
        {
          "system" : "urn:ietf:rfc:3986",
          "value" : "urn:oid:2.16.840.1.113883.18.4"
        }
      ],
      "version" : "1.0.0",
      "name" : "Event",
      "title" : "Event (2.1 - 1.0.0)",
      "status" : "active",
      "experimental" : true,
      "date" : "2026-01-27T19:20:25+00:00",
      "publisher" : "HL7/FO",
      "contact" : [
        {
          "name" : "HL7/FO",
          "telecom" : [
            {
              "system" : "url",
              "value" : "http://www.hl7.org"
            }
          ]
        }
      ],
      "description" : "HL7-defined code system of concepts specifying the trigger event for Version 2.x interface messages.  Used in HL7 Version 2.x messaging in the MSH 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"
        },
        {
          "extension" : [
            {
              "url" : "http://hl7.org/fhir/StructureDefinition/codesystem-property-valueset",
              "valueCanonical" : "http://terminology.hl7.org/v2plusvocab/ValueSet/hl7VS354-1"
            }
          ],
          "code" : "msgstruct",
          "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#msgstruct",
          "description" : "msgstruct",
          "type" : "code"
        },
        {
          "extension" : [
            {
              "url" : "http://hl7.org/fhir/StructureDefinition/codesystem-property-valueset",
              "valueCanonical" : "http://terminology.hl7.org/v2plusvocab/ValueSet/hl7VShl7VSmessageType"
            }
          ],
          "code" : "msgtype",
          "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#msgtype",
          "description" : "msgtype",
          "type" : "code"
        }
      ],
      "concept" : [
        {
          "id" : "13",
          "code" : "A01",
          "display" : "Admit a patient",
          "definition" : "Admit a patient",
          "designation" : [
            {
              "language" : "de",
              "value" : "Aufnahme"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "14",
          "code" : "A02",
          "display" : "Transfer a Patient",
          "definition" : "Transfer a Patient",
          "designation" : [
            {
              "language" : "de",
              "value" : "Verlegung"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "15",
          "code" : "A03",
          "display" : "Discharge a Patient",
          "definition" : "Discharge a Patient",
          "designation" : [
            {
              "language" : "de",
              "value" : "Entlassung"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "16",
          "code" : "A04",
          "display" : "Register a Patient",
          "definition" : "Register a Patient",
          "designation" : [
            {
              "language" : "de",
              "value" : "Patientenregistrierung (Besuchsmeldung)"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "17",
          "code" : "A05",
          "display" : "Pre-admit a Patient",
          "definition" : "Pre-admit a Patient",
          "designation" : [
            {
              "language" : "de",
              "value" : "Voraufnahme eines PAtienten"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "18",
          "code" : "A06",
          "display" : "Transfer an outpatient to inpatient",
          "definition" : "Transfer an outpatient to inpatient",
          "designation" : [
            {
              "language" : "de",
              "value" : "Änderung von ambulant in stationär"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "19",
          "code" : "A07",
          "display" : "Transfer an Inpatient to Outpatient",
          "definition" : "Transfer an Inpatient to Outpatient",
          "designation" : [
            {
              "language" : "de",
              "value" : "Änderung von stationär in ambulant"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "20",
          "code" : "A08",
          "display" : "Update patient information",
          "definition" : "Update patient information",
          "designation" : [
            {
              "language" : "de",
              "value" : "Änderung von Patienteninformationen"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "21",
          "code" : "A09",
          "display" : "Patient departing",
          "definition" : "Patient departing",
          "designation" : [
            {
              "language" : "de",
              "value" : "Patientenabgang"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "22",
          "code" : "A10",
          "display" : "Patient arriving",
          "definition" : "Patient arriving",
          "designation" : [
            {
              "language" : "de",
              "value" : "Patientenzugang (Bettenzuweisung)"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "23",
          "code" : "A11",
          "display" : "Cancel admit",
          "definition" : "Cancel admit",
          "designation" : [
            {
              "language" : "de",
              "value" : "Aufnahme löschen"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "24",
          "code" : "A12",
          "display" : "Cancel transfer",
          "definition" : "Cancel transfer",
          "designation" : [
            {
              "language" : "de",
              "value" : "Verlegung löschen"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "25",
          "code" : "A13",
          "display" : "Cancel discharge",
          "definition" : "Cancel discharge",
          "designation" : [
            {
              "language" : "de",
              "value" : "Entlassung löschen"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "26",
          "code" : "A14",
          "display" : "Pending admit",
          "definition" : "Pending admit",
          "designation" : [
            {
              "language" : "de",
              "value" : "bevorstehende Aufnahme"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "code" : "A15",
          "display" : "Pending transfer",
          "definition" : "Pending transfer",
          "designation" : [
            {
              "language" : "de",
              "value" : "Bevorstehende Verlegung"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "28",
          "code" : "A16",
          "display" : "Pending discharge",
          "definition" : "Pending discharge",
          "designation" : [
            {
              "language" : "de",
              "value" : "bevorstehende Entlassung"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "288",
          "code" : "A17",
          "display" : "Swap Patients",
          "definition" : "Swap Patients",
          "designation" : [
            {
              "language" : "de",
              "value" : "Bettentausch zweier Patienten"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "289",
          "code" : "A18",
          "display" : "Merge patient information",
          "definition" : "Merge patient information",
          "designation" : [
            {
              "language" : "de",
              "value" : "Patienteninformation zusammenführen"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "code" : "A19",
          "display" : "Patient query",
          "definition" : "Patient query",
          "designation" : [
            {
              "language" : "de",
              "value" : "Patientenanfrage"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "358",
          "code" : "A20",
          "display" : "Bed status updates",
          "definition" : "Bed status updates",
          "designation" : [
            {
              "language" : "de",
              "value" : "Änderung des Bettenstatus"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "359",
          "code" : "A21",
          "display" : "Leave of Absence - Out (leaving)",
          "definition" : "Leave of Absence - Out (leaving)",
          "designation" : [
            {
              "language" : "de",
              "value" : "Beginn einer Patientenabwesenheit"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "360",
          "code" : "A22",
          "display" : "Leave of Absence - In (returning)",
          "definition" : "Leave of Absence - In (returning)",
          "designation" : [
            {
              "language" : "de",
              "value" : "Ende einer Patientenabwesenheit"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "361",
          "code" : "A23",
          "display" : "Delete a Patient Record",
          "definition" : "Delete a Patient Record",
          "designation" : [
            {
              "language" : "de",
              "value" : "Löschen eines Patientensatzes"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "363",
          "code" : "A24",
          "display" : "Link Patient Records",
          "definition" : "Link Patient Records",
          "designation" : [
            {
              "language" : "de",
              "value" : "Verknüpfen von Patienteninformationen"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "code" : "O01",
          "display" : "Order message",
          "definition" : "Order message",
          "designation" : [
            {
              "language" : "de",
              "value" : "Auftrag / Verordnung"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "541",
          "code" : "O02",
          "display" : "Order response",
          "definition" : "Order response",
          "designation" : [
            {
              "language" : "de",
              "value" : "Ergebnisrückmeldung"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "533",
          "code" : "P01",
          "display" : "Add and update patient account",
          "definition" : "Add and update patient account",
          "designation" : [
            {
              "language" : "de",
              "value" : "Hinzufügen und Ändern von Abrechnungsinformationen"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "code" : "P02",
          "display" : "Purge Patient Accounts",
          "definition" : "Purge Patient Accounts",
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "535",
          "code" : "P03",
          "display" : "Post detail financial transaction",
          "definition" : "Post detail financial transaction",
          "designation" : [
            {
              "language" : "de",
              "value" : "Buchung"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "536",
          "code" : "P04",
          "display" : "Generate bills and A/R statements",
          "definition" : "Generate bills and A/R statements",
          "designation" : [
            {
              "language" : "de",
              "value" : "Druck und Anzeige von Rechnungen"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "code" : "Q01",
          "display" : "Immediate access",
          "definition" : "Immediate access",
          "designation" : [
            {
              "language" : "de",
              "value" : "Anfrage mit sofortiger Antwort"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "543",
          "code" : "Q02",
          "display" : "Deferred Access",
          "definition" : "Deferred Access",
          "designation" : [
            {
              "language" : "de",
              "value" : "Anfrage mit Zeitversatz"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "537",
          "code" : "R01",
          "display" : "Unsolicited transmission of requested Observ.",
          "definition" : "Unsolicited transmission of requested Observ.",
          "designation" : [
            {
              "language" : "de",
              "value" : "unangeforderte Übermittlung eines Befundes"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        },
        {
          "id" : "539",
          "code" : "R03",
          "display" : "Display oriented results, query/unsol. update",
          "definition" : "Display oriented results, query/unsol. update",
          "designation" : [
            {
              "language" : "de",
              "value" : "anzeigeorientiertes Ergebnis"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.1"
            },
            {
              "code" : "msgstruct",
              "valueCode" : "?"
            }
          ]
        }
      ]
    }