HL7 Terminology
1.0.0 - Publication

This page is part of the HL7 Terminology (v1.0.0: Release) based on FHIR R4. The current version which supercedes this version is 5.2.0. For a full list of available versions, see the Directory of published versions



Defining URL:http://terminology.hl7.org/ValueSet/v2-0301

Types of UID (Universal Identifiers).

Publisher:HL7, Inc
OID:2.16.840.1.113883.21.198 (for OID based terminology systems)

Copyright HL7. Licensed under creative commons public domain

Source Resource:XML / JSON / Turtle


This value set is not used

Content Logical Definition

Logical Definition (CLD)



This value set contains 19 concepts

Expansion based on universalIdType v2.2.0 (CodeSystem)

All codes from system http://terminology.hl7.org/CodeSystem/v2-0301

CAPCollege of American Pathologist Accreditation NumberAllows for the ability to designate organization identifier as a "CAP" assigned number (for labs)
CLIAClinical Laboratory Improvement AmendmentsClinical Laboratory Improvement Amendments. Allows for the ability to designate organization identifier as a "CLIA" assigned number (for labs)
CLIPClinical laboratory Improvement ProgramClinical laboratory Improvement Program. Allows for the ability to designate organization identifier as a "CLIP" assigned number (for labs).  Used by US Department of Defense.
DNSDomain Name SystemAn Internet host name, in accordance with RFC 1035; or an IP address. Either in ASCII or as integers, with periods between components ("dotted" notation).
EUI64IEEE 64-bit Extended Unique IdentifierIEEE 64-bit Extended Unique Identifier is comprised of a 24-bit company identifier and a 40-bit instance identifier. The value shall be formatted as 16 ASCII HEX digits, for example, “AABBCC1122334455”. The 24-bit company identifier, formally known as Organizationally Unique Identifier (OUI-24), is guaranteed to be globally unique. The 40-bit extensions are assigned by manufacturers. This identifier is often used in equipment interfaces (e.g., “MAC” address format for IPv4 & IPv6). [See http://standards.ieee.org/regauth/oui/tutorials/EUI64.html for a detailed explanation of the format.]
GUIDglobally unique identifierSame as UUID.
HCDCEN Healthcare Coding IdentifierThe CEN Healthcare Coding Scheme Designator
HL7HL7 registration schemesHL7 registration schemes
ISOISO Object IdentifierAn International Standards Organization Object Identifier (OID), in accordance with ISO/IEC 8824. Formatted as decimal digits separated by periods; recommended limit of 64 characters
LLocalThese are reserved for locally defined coding schemes.
L,M,NLocalThese are reserved for locally defined coding schemes.
MLocalThese are reserved for locally defined coding schemes.
NLocalThese are reserved for locally defined coding schemes.
NPIUS National Provider IdentifierAllows for the ability to designate organization identifier as a "NPI" assigned number (lab, any medical provider, can be a person or an organization)
RandomRandomUsually a base64 encoded string of random bits.<p>Note: Random IDs are typically used for instance identifiers, rather than an identifier of an Assigning Authority that issues instance identifiers
URIUniform Resource IdentifierUniform Resource Identifier
UUIDUniversal Unique IdentifierThe 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
x400X.400 MHS identifierAn X.400 MHS identifier. Recommended format is in accordance with RFC 1649
x500X500 directory NameAn X.500 directory name

Explanation of the columns that may appear on this page:

Level A few code lists that FHIR defines are hierarchical - each code is assigned a level. In this scheme, some codes are under other codes, and imply that the code they are under also applies
Source The source of the definition of the code (when the value set draws in codes defined elsewhere)
Code The code (used as the code in the resource instance)
Display The display (used in the display element of a Coding). If there is no display, implementers should not simply display the code, but map the concept into their application
Definition An explanation of the meaning of the concept
Comments Additional notes about how to use the code


2020-05-06reviseVocabulary WGTed KleinMigrated to the UTG maintenance environment and publishing tooling.