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: Diagnosis Priority (2.5.1 - 1.0.0) (Experimental)

Official URL: http://terminology.hl7.org/v2plusvocab/CodeSystem/diagnosisPriority | Version: 1.0.0
Active as of 2026-01-27 | Computable Name: DiagnosisPriority
Other Identifiers: OID:2.16.840.1.113883.18.218
Copyright/Legal: HL7 Inc., 2026

Code system of concepts that identify the significance or priority of the diagnosis code. Note that the codes are numeric, and the number of the code represents the ordinal priority of the associated diagnosis. Used in the DG1 segment in HL7 Version 2.x messaging. The predefined codes are the most common, and just a starter set, as the codes are an unbounded list; additional ranked procedures may be signified by incrementing the code value as needed.

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

- Hl7VSdiagnosisPriority

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/diagnosisPriority` provides a fragment that includes following codes:

Code | Display | Definition | versionIntroduced | modified
0 | Not included in diagnosis ranking | Not included in diagnosis ranking | 2.3.1 |
1 | The primary diagnosis | The primary diagnosis | 2.3.1 |
2 | For ranked secondary diagnosis | For ranked secondary diagnosis | 2.3.1 | 2023-10-04