HL7 v2.5.1 Vocabulary
0.1.0 - ci-build

HL7 v2.5.1 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.v251/ and changes regularly. See the Directory of published versions

## : Universal ID Type (2.5.1 - 1.1.0) - JSON Representation

Active as of 2026-01-27

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    {
      "resourceType" : "CodeSystem",
      "id" : "universalIdType",
      "text" : {
        "status" : "generated",
        "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><ul><li>Include all codes defined in <a href=\"CodeSystem-universalIdType.html\"><code>http://terminology.hl7.org/v2plusvocab/CodeSystem/universalIdType</code></a></li></ul></div>"
      },
      "extension" : [
        {
          "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-v2versionCreated",
          "valueString" : "2.5.1"
        },
        {
          "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-versionHistory",
          "valueString" : "generate correct history somehow"
        },
        {
          "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-tableNo",
          "valueString" : "0301"
        }
      ],
      "url" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/universalIdType",
      "identifier" : [
        {
          "system" : "urn:ietf:rfc:3986",
          "value" : "urn:oid:2.16.840.1.113883.18.186"
        }
      ],
      "version" : "1.1.0",
      "name" : "UniversalIdType",
      "title" : "Universal ID Type (2.5.1 - 1.1.0)",
      "status" : "active",
      "experimental" : true,
      "date" : "2026-01-27T19:29:18+00:00",
      "publisher" : "HL7/FO",
      "contact" : [
        {
          "name" : "HL7/FO",
          "telecom" : [
            {
              "system" : "url",
              "value" : "http://www.hl7.org"
            }
          ]
        }
      ],
      "description" : "HL7-defined code system of types of UID (Universal Identifiers).   Used in HL7 Version 2.x messaging HD and EI datatypes.",
      "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" : "DNS",
          "display" : "Domain Name System",
          "definition" : "An Internet dotted name. Either in ASCII or as integers",
          "designation" : [
            {
              "language" : "de",
              "value" : "Internet-Adresse"
            }
          ],
          "property" : [
            {
              "code" : "comment",
              "valueString" : "An Internet host name, in accordance with RFC 1035; or an IP address. Either in ASCII or as integers, with periods between components (“dotted” notation)."
            },
            {
              "code" : "usage",
              "valueString" : "Either in ASCII or as integers"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "code" : "GUID",
          "display" : "globally unique identifier",
          "definition" : "Same as UUID.",
          "designation" : [
            {
              "language" : "de",
              "value" : "GUID"
            }
          ],
          "property" : [
            {
              "code" : "comment",
              "valueString" : "Same as UUID.Retained for backward compatibility only as of v2.7; use UUID instead"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "code" : "HCD",
          "display" : "CEN Healthcare Coding Identifier",
          "definition" : "The CEN Healthcare Coding Scheme Designator. (Identifiers used in DICOM follow this assignment scheme.)",
          "property" : [
            {
              "code" : "comment",
              "valueString" : "The CEN Healthcare Coding Scheme Designator. Retained for backward compatibility only as of v2.7; does not identify Assigning Authorities"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "code" : "HL7",
          "display" : "HL7 registration schemes",
          "definition" : "Reserved for future HL7 registration schemes",
          "designation" : [
            {
              "language" : "de",
              "value" : "für HL7 reserviert"
            }
          ],
          "property" : [
            {
              "code" : "comment",
              "valueString" : "Retained for backward compatibility only as of v2.7; HL7 assigns ISO OIDs for Assigning Authorities"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "code" : "ISO",
          "display" : "ISO Object Identifier",
          "definition" : "An International Standards Organization Object Identifier",
          "designation" : [
            {
              "language" : "de",
              "value" : "ISO-ID"
            }
          ],
          "property" : [
            {
              "code" : "comment",
              "valueString" : "An International Standards Organization Object Identifier (OID), in accordance with ISO/IEC 8824.  Formatted as decimal digits separated by periods; recommended limit of 64 characters"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "code" : "L",
          "display" : "Local",
          "definition" : "These are reserved for locally defined coding schemes.",
          "designation" : [
            {
              "language" : "de",
              "value" : "reserviert für lokale Tabellen"
            }
          ],
          "property" : [
            {
              "code" : "comment",
              "valueString" : "Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "code" : "M",
          "display" : "Local",
          "definition" : "These are reserved for locally defined coding schemes.",
          "designation" : [
            {
              "language" : "de",
              "value" : "reserviert für lokale Tabellen"
            }
          ],
          "property" : [
            {
              "code" : "comment",
              "valueString" : "Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "code" : "N",
          "display" : "Local",
          "definition" : "These are reserved for locally defined coding schemes.",
          "designation" : [
            {
              "language" : "de",
              "value" : "reserviert für lokale Tabellen"
            }
          ],
          "property" : [
            {
              "code" : "comment",
              "valueString" : "Locally defined coding entity identifier.Retained for backward compatibility only as of v 2.8"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "code" : "Random",
          "display" : "Random",
          "definition" : "Usually a base64 encoded string of random bits.<p>The uniqueness depends on the length of the bits. Mail systems often generate ASCII string \"unique names,\" from a combination of random bits and system names. Obviously, such identifiers will not be constr",
          "property" : [
            {
              "code" : "comment",
              "valueString" : "Usually a base64 encoded string of random bits.Retained for backward compatibility only as of v2.7; equivalent to a locally defined entity identifier scheme; use L. M, or N instead. Note: Random IDs are typically used for instance identifiers, rather than an identifier of an Assigning Authority that issues instance identifiers"
            },
            {
              "code" : "usage",
              "valueString" : "The uniqueness depends on the length of the bits. Mail systems often\r\ngenerate ASCII string \"unique names,\" from a combination of random bits\r\nand system names. Obviously, such identifiers will not be constrained to the\r\nbase64 character set."
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "code" : "URI",
          "display" : "Uniform Resource Identifier",
          "definition" : "Uniform Resource Identifier",
          "designation" : [
            {
              "language" : "de",
              "value" : "URI"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.5"
            }
          ]
        },
        {
          "code" : "UUID",
          "display" : "Universal Unique Identifier",
          "definition" : "The DCE Universal Unique Identifier",
          "designation" : [
            {
              "language" : "de",
              "value" : "UUID"
            }
          ],
          "property" : [
            {
              "code" : "comment",
              "valueString" : "The DCE Universal Unique Identifier, in accordance with RFC 4122. Recommended format is 32 hexadecimal digits separated by hyphens, in the digit grouping 8-4-4-4-12"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "code" : "x400",
          "display" : "X.400 MHS identifier",
          "definition" : "An X.400 MHS format identifier",
          "designation" : [
            {
              "language" : "de",
              "value" : "X.400"
            }
          ],
          "property" : [
            {
              "code" : "comment",
              "valueString" : "Recommended format is in accordance with RFC 1649"
            },
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        },
        {
          "code" : "x500",
          "display" : "X500 directory Name",
          "definition" : "An X.500 directory name",
          "designation" : [
            {
              "language" : "de",
              "value" : "X.500 Verzeichnisname"
            }
          ],
          "property" : [
            {
              "code" : "versionIntroduced",
              "valueString" : "2.3"
            }
          ]
        }
      ]
    }