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

## CodeSystem: Time Delay Post Challenge (2.5.1 - 1.0.0) (Experimental)

Official URL: http://terminology.hl7.org/v2plusvocab/CodeSystem/timeDelayPostChallenge | Version: 1.0.0
Active as of 2026-01-27 | Computable Name: TimeDelayPostChallenge
Other Identifiers: OID:2.16.840.1.113883.18.151
Copyright/Legal: HL7 Inc., 2026

HL7-defined code system of concepts used to classify an observation definition as being a component of a challenge test. Used in HL7 Version 2.x messaging in the OM1 segment.

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

- Hl7VStimeDelayPostChallenge

Properties

This code system defines the following properties for its concepts

Name | Code | URI | Type | Description
versionIntroduced | versionIntroduced | http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionIntroduced | string | version when was this code introduced
versionDeprecated | versionDeprecated | http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionDeprecated | string | version when was this code deprecated
status | status | http://hl7.org/fhir/concept-properties#status | code | A code that indicates the status of the concept. Typical values are active, experimental, deprecated, and retired
comment | comment | http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#comment | string | A string that provides additional detail pertinent to the use or understanding of the concept
usage | usage | http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#usage | string | usage notes for this code
modified | modified | http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#modified | dateTime | date of last modification

Concepts

This case-sensitive code system `http://terminology.hl7.org/v2plusvocab/CodeSystem/timeDelayPostChallenge` defines the following codes:

Code | Display | Definition | versionIntroduced
10D | 10 days | 10 days | 2.3
10M | 10 minutes post challenge | 10 minutes post challenge | 2.3
12H | 12 hours post challenge | 12 hours post challenge | 2.3
15M | 15 minutes post challenge | 15 minutes post challenge | 2.3
1H | 1 hour post challenge | 1 hour post challenge | 2.3
1L | 1 month (30 days) post challenge | 1 month (30 days) post challenge | 2.3
1M | 1 minute post challenge | 1 minute post challenge | 2.3
1W | 1 week | 1 week | 2.3
2.5H | 2 1/2 hours post challenge | 2 1/2 hours post challenge | 2.3
20M | 20 minutes post challenge | 20 minutes post challenge | 2.3
24H | 24 hours post challenge | 24 hours post challenge | 2.3
25M | 25 minutes post challenge | 25 minutes post challenge | 2.3
2D | 2 days | 2 days | 2.3
2H | 2 hours post challenge | 2 hours post challenge | 2.3
2L | 2 months (60 days) post challenge | 2 months (60 days) post challenge | 2.3
2M | 2 minutes post challenge | 2 minutes post challenge | 2.3
2W | 2 weeks | 2 weeks | 2.3
30M | 30 minutes post challenge | 30 minutes post challenge | 2.3
3D | 3 days | 3 days | 2.3
3H | 3 hours post challenge | 3 hours post challenge | 2.3
3L | 3 months (90 days) post challenge | 3 months (90 days) post challenge | 2.3
3M | 3 minutes post challenge | 3 minutes post challenge | 2.3
3W | 3 weeks | 3 weeks | 2.3
4D | 4 days | 4 days | 2.3
4H | 4 hours post challenge | 4 hours post challenge | 2.3
4M | 4 minutes post challenge | 4 minutes post challenge | 2.3
4W | 4 weeks | 4 weeks | 2.3
5D | 5 days | 5 days | 2.3
5H | 5 hours post challenge | 5 hours post challenge | 2.3
5M | 5 minutes post challenge | 5 minutes post challenge | 2.3
6D | 6 days | 6 days | 2.3
6H | 6 hours post challenge | 6 hours post challenge | 2.3
6M | 6 minutes post challenge | 6 minutes post challenge | 2.3
7D | 7 days | 7 days | 2.3
7H | 7 hours post challenge | 7 hours post challenge | 2.3
7M | 7 minutes post challenge | 7 minutes post challenge | 2.3
8H | 8 hours post challenge | 8 hours post challenge | 2.3
8H SHIFT | 8 hours aligned on nursing shifts | 8 hours aligned on nursing shifts | 2.3
8M | 8 minutes post challenge | 8 minutes post challenge | 2.3
9M | 9 minutes post challenge | 9 minutes post challenge | 2.3
BS | Baseline (time just before the challenge) | Baseline (time just before the challenge) | 2.3
PEAK | The time post drug dose at which the highest drug level is reached (differs by drug) | The time post drug dose at which the highest drug level is reached (differs by drug) | 2.3
RANDOM | Time from the challenge, or dose not specified. (random) | Time from the challenge, or dose not specified. (random) | 2.3
TROUGH | The time post drug dose at which the lowest drug level is reached (varies with drug) | The time post drug dose at which the lowest drug level is reached (varies with drug) | 2.3