HL7 v2.4 Vocabulary
0.1.0 - ci-build

HL7 v2.4 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.v24/ and changes regularly. See the Directory of published versions

## CodeSystem: Allow Substitution Codes (2.4 - 1.1.0) (Experimental)

Official URL: http://terminology.hl7.org/v2plusvocab/CodeSystem/allowSubstitution | Version: 1.1.0
Active as of 2026-01-27 | Computable Name: AllowSubstitution
Other Identifiers: OID:2.16.840.1.113883.18.172
Copyright/Legal: HL7 Inc., 2026

Code system of concepts used to indicate whether the appointment resource may be substituted for another by the entity assigned to fulfill the appointment. Used in HL7 Version 2.x messaging in the AIS and AIG segments.

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

- Hl7VSallowSubstitution
- Hl7VSallowSubstitutionCodes

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-insensitive code system `http://terminology.hl7.org/v2plusvocab/CodeSystem/allowSubstitution` defines the following codes:

Code | Display | Definition | versionIntroduced
Confirm | Contact the Placer Contact Person prior to making any substitutions of this resource | Contact the Placer Contact Person prior to making any substitutions of this resource | 2.3.1
No | Substitution of this resource is not allowed | Substitution of this resource is not allowed | 2.3.1
Notify | Notify the Placer Contact Person, through normal institutional procedures, that a substitution of this resource has been made | Notify the Placer Contact Person, through normal institutional procedures, that a substitution of this resource has been made | 2.3.1
Yes | Substitution of this resource is allowed | Substitution of this resource is allowed | 2.3.1