This page is part of the FHIR Specification (v4.3.0: R4B -  STU). 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
. Page versions: R5 R4B R4
| FHIR Infrastructure  Work Group | Maturity Level: 5 | Trial Use | Use Context: Any | 
This is a value set defined by the FHIR project.
Summary
| Defining URL: | http://hl7.org/fhir/ValueSet/distance-units | 
| Version: | 4.3.0 | 
| Name: | CommonUCUMCodesForDistance | 
| Title: | Common UCUM Codes for Distance | 
| Definition: | Unified Code for Units of Measure (UCUM). This value set includes common UCUM codes for units of distance | 
| Committee: | FHIR Infrastructure  Work Group | 
| OID: | 2.16.840.1.113883.4.642.3.62 (for OID based terminology systems) | 
| Copyright: | 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 Resource | XML / JSON | 
This value set is used in the following places:
http://unitsofmeasure.org 
| Code | Display | 
| nm | nanometers | 
| um | micrometers | 
| mm | millimeters | 
| m | meters | 
| km | kilometers | 
See the full registry of value sets defined as part of FHIR.
Explanation of the columns that may appear on this page:
| Lvl | A 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 | 
| 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). If the code is in italics, this indicates that the code is not selectable ('Abstract') | 
| 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 |