Release 4

This page is part of the FHIR Specification (v4.0.1: R4 - Mixed Normative and STU) in it's permanent home (it will always be available at this URL). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions . Page versions: R5 R4B R4 Value Set

Vocabulary Work Group Maturity Level: 0Informative Use Context: Any

This is a value set defined by the FHIR project.


Defining URL:
Title:All UCUM Expression for Distance

Unified Code for Units of Measure (UCUM). This value set includes all UCUM codes for units of length

OID: (for OID based terminology systems)

The UCUM codes, UCUM table (regardless of format), and UCUM Specification are copyright © 1999-2009, Regenstrief Institute, Inc. and the Unified Codes for Units of Measures (UCUM) Organization. All rights reserved.

Source ResourceXML / JSON

This value set is not currently used

This value set includes codes from the following code systems:


This expansion generated 01 Nov 2019

This value set has >1000 codes in it. In order to keep the publication size manageable, only a selection (1000 codes) of the whole set of codes is shown

All codes from system

[Ch]French (catheter gauge)
[in_i]inch (international)
[mi_i]statute mile
[nmi_i]nautical mile
mL/({h'b}.m2)milliliter / h'b * (meter ^ 2)
mL/[sin_i]milliliter per square inch (international)
mL/m2milliliter per square meter
[ch_br]Gunter's chain
[ch_us]Gunter's chain Surveyor's chain
[cicero]cicero Didot's pica
[didot]didot Didot's point
[ligne]ligne French line
[lk_br]link for Gunter's chain
[lk_us]link for Gunter's chain
[nmi_br]nautical mile
[pca_pr]Printer's pica
[pied]pied French foot
[pnt_pr]Printer's point
[pouce]pouce French inch
[rch_us]Ramden's chain Engineer's chain
[rlk_us]link for Ramden's chain
AUastronomic unit


See the full registry of value sets defined as part of FHIR.

Explanation of the columns that may appear on this page:

LvlA few code lists that FHIR defines are hierarchical - each code is assigned a level. For value sets, levels are mostly used to organize codes for user convenience, but may follow code system hierarchy - see Code System for further information
SourceThe source of the definition of the code (when the value set draws in codes defined elsewhere)
CodeThe code (used as the code in the resource instance). If the code is in italics, this indicates that the code is not selectable ('Abstract')
DisplayThe 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
DefinitionAn explanation of the meaning of the concept
CommentsAdditional notes about how to use the code