HL7 v2.8 Vocabulary
0.1.0 - ci-build

HL7 v2.8 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.v28/ and changes regularly. See the Directory of published versions

## CodeSystem: Expanded Yes/no Indicator (2.8 - 1.0.0) (Experimental)

Official URL: http://terminology.hl7.org/v2plusvocab/CodeSystem/expandedYes-NoIndicator | Version: 1.0.0
Active as of 2026-01-27 | Computable Name: ExpandedYes-NoIndicator
Other Identifiers: OID:2.16.840.1.113883.18.347
Copyright/Legal: HL7 Inc., 2026

HL7-defined code system of concepts used to specify an expansion on the original Yes/No indicator table by including "flavors of null". It is intended to be applied to fields where the response is not limited to "yes" or "no". Used in numerous locations in HL7 Version 2.x messaging.

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

- Hl7VSexpandedYes-NoIndicator
- Hl7VSyes-no-Indicator

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/expandedYes-NoIndicator` defines the following codes:

Code | Display | Definition | versionIntroduced | usage | Deutsch (German, de)
ASKU | asked but unknown | asked but unknown | 2.5 | Information was sought but not found (e.g., patient was asked but didn't know | gefragt, aber nicht genannt
N | No | No | 2.5 |  | Nein
NA | not applicable | not applicable | 2.5 | No proper value is applicable in this context (e.g., last menstrual period for a male) | nicht anwendbar
NASK | not asked | not asked | 2.5 | This information has not been sought (e.g., patient was not asked | nicht erfragt
NAV | temporarily unavailable | temporarily unavailable | 2.5 | Information is not available at this time but it is expected that it will be available later | temporär nicht verfügbar
NI | No Information | No Information | 2.5 | No information whatsoever can be inferred from this exceptional value. This is the most general exceptional value. It is also the default exceptional value | keine Information
NP | not present | not present | 2.5 | Obsolete as of v 2.7. |
UNK | unknown | unknown | 2.5 | A proper value is applicable, but not known | unbekannt
Y | Yes | Yes | 2.5 |  | Ja