HL7 Terminology (THO)
3.0.0 - Publication

This page is part of the HL7 Terminology (v3.0.0: 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

CodeSystem: durationCategories


Defining URL:http://terminology.hl7.org/CodeSystem/v2-0255
Status:Active as of 12/1/19

Code system of concepts used to classify an observation definition as intended to measure a patient's state at a point in time. Used in HL7 Version 2.x messaging in the OM1 segment.

Publisher:HL7, Inc
Committee:Infrastructure And Messaging

Copyright HL7. Licensed under creative commons public domain

Content:Complete: All the concepts defined by the code system are included in the code system resource
OID:2.16.840.1.113883.18.150 (for OID based terminology systems)
Value Set:http://terminology.hl7.org/ValueSet/v2-0255 ( is the value set for all codes in this code system)
Source Resource:XML / JSON / Turtle

This Code system is referenced in the content logical definition of the following value sets:


statushttp://terminology.hl7.org/CodeSystem/utg-concept-properties#statusStatus of the conceptcode
deprecatedhttp://terminology.hl7.org/CodeSystem/utg-concept-properties#v2-table-deprecatedVersion of HL7 in which the code was deprecatedcode
v2-concCommenthttp://terminology.hl7.org/CodeSystem/utg-concept-properties#v2-concCommentV2 Concept Commentstring
HL7usageNoteshttp://terminology.hl7.org/CodeSystem/utg-concept-properties#HL7usageNotesHL7 Concept Usage Notesstring

This code system http://terminology.hl7.org/CodeSystem/v2-0255 defines the following codes:

CodeDisplayDefinitionV2 Concept CommentHL7 Concept Usage Notes
* (asterisk) Life of the "unit"(asterisk) Life of the "unit"Used for blood products.Deprecated March 2016; use code LU instead.
30M 30 minutes30 minutes
1H 1 hour1 hour
2H 2 hours2 hours
2.5H 2 1/2 hours2 1/2 hours
3H 3 hours3 hours
4H 4 hours4 hours
5H 5 hours5 hours
6H 6 hours6 hours
7H 7 hours7 hours
8H 8 hours8 hours
12H 12 hours12 hours
24H 24 hours24 hours
2D 2 days2 days
3D 3 days3 days
4D 4 days4 days
5D 5 days5 days
6D 6 days6 days
1W 1 week1 week
2W 2 weeks2 weeks
3W 3 weeks3 weeks
4W 4 weeks4 weeks
1L 1 months (30 days)1 months (30 days)
2L 2 months2 months
3L 3 months3 months
LU Life of the "unit"Life of the "unit" (for blood products).In a master file update for blood products, no specific duration value can be specified (see OM1-43 “Point Versus Interval” field definition).
PT point in timeTo identify measures at a point in time. This is a synonym for "spot" or "random" as applied to urine measurements.


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