HL7 v2.1 Vocabulary
0.2.0 - ci-build

HL7 v2.1 Vocabulary, published by HL7/FO. This guide is not an authorized publication; it is the continuous build for version 0.2.0 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.v21/ and changes regularly. See the Directory of published versions

ValueSet: What Subject Filter (2.1 - 1.0.0) (Experimental)

Official URL: http://terminology.hl7.org/v2plusvocab/ValueSet/hl7VSwhatSubjectFilter Version: 1.0.0
Active as of 2026-03-13 Computable Name: Hl7VSwhatSubjectFilter
Other Identifiers: OID:2.16.840.1.113883.21.23, urn:ietf:rfc:3986#Uniform Resource Identifier (URI)#http://terminology.hl7.org/v2plusvocab/ValueSet/v2-0048

Copyright/Legal: HL7 Inc., 2026

Value Set of codes which specify the kind of information that is required to satisfy a query request. The values define the type of transaction inquiry.

References

This value set is not used here; it may be used elsewhere (e.g. specifications and/or implementations that use this content)

Logical Definition (CLD)

 

Expansion

Expansion performed internally based on codesystem What Subject Filter (2.1 - 1.0.0) v1.0.0 (CodeSystem)

This value set contains 11 concepts

SystemCodeDisplay (en)DefinitionJSONXML
http://terminology.hl7.org/v2plusvocab/CodeSystem/whatSubjectFilter  ADVAdvice/DiagnosisAdvice/Diagnosis
http://terminology.hl7.org/v2plusvocab/CodeSystem/whatSubjectFilter  ANUNursing Unit Look upNursing Unit Look up
http://terminology.hl7.org/v2plusvocab/CodeSystem/whatSubjectFilter  APNPatient name look upPatient name look up
http://terminology.hl7.org/v2plusvocab/CodeSystem/whatSubjectFilter  CANCancel. Used to cancel a queryCancel. Used to cancel a query
http://terminology.hl7.org/v2plusvocab/CodeSystem/whatSubjectFilter  DEMDemographicsDemographics
http://terminology.hl7.org/v2plusvocab/CodeSystem/whatSubjectFilter  MRIMost recent inpatientMost recent inpatient
http://terminology.hl7.org/v2plusvocab/CodeSystem/whatSubjectFilter  MROMost recent outpatientMost recent outpatient
http://terminology.hl7.org/v2plusvocab/CodeSystem/whatSubjectFilter  OTHOtherOther
http://terminology.hl7.org/v2plusvocab/CodeSystem/whatSubjectFilter  PROProcedureProcedure
http://terminology.hl7.org/v2plusvocab/CodeSystem/whatSubjectFilter  RESResultResult
http://terminology.hl7.org/v2plusvocab/CodeSystem/whatSubjectFilter  STAStatusStatus

Explanation of the columns that may appear on this page:

Level A few code lists that FHIR defines are hierarchical - each code is assigned a level. In this scheme, some codes are under other codes, and imply that the code they are under also applies
System The source of the definition of the code (when the value set draws in codes defined elsewhere)
Code The code (used as the code in the resource instance)
Display The display (used in the display element of a Coding). If there is no display, implementers should not simply display the code, but map the concept into their application
Definition An explanation of the meaning of the concept
Comments Additional notes about how to use the code