Dissolve-E: AWMF Guideline Registry - Local Development build (v0.2.0) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions
Extension: Medical Subject Category
| Official URL: http://fhir.awmf.org/awmf.ig/StructureDefinition/ext-medical-subject-category | Version: 0.2.0 | |||
| Draft as of 2026-01-29 | Computable Name: MedicalSubjectCategory | |||
An extension to specify medical subject category related to an organization.
Context of Use
-
Element ID:
Organization
This extension may be used on the following element(s)
Guidance
This extension specifies medical subject categories (broad discipline areas) related to an organization.
Overview
Medical subject categories represent broad groupings of medical disciplines. This extension is used to classify medical societies and organizations by their primary areas of focus.
Context
This extension can be applied to Organization resources.
Value Type
The value is a CodeableConcept bound to the medical subject categories value set:
* value[x] only CodeableConcept
* valueCodeableConcept.coding from vs-medical-subject-categories (required)
Related Extension
medicalSubject– More specific subject areas within a category
Example Usage
// Assign multiple categories:
* extension[medicalSubjectCategory][+].valueCodeableConcept = cs-medical-subject-categories#surgical "Surgical Disciplines"
* extension[medicalSubjectCategory][+].valueCodeableConcept = cs-medical-subject-categories#psychosocial "Psychosocial Disciplines"
This profile of a FHIR Extension is derived from the Extension FHIR resource.
Usage info
Usages:
- Use this Extension: Medical Society
- Examples for this Extension: Example AWMF Member Organization and Example Medical Society
You can also check for usages in the FHIR IG Statistics
Formal Views of Extension Content
Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work.
This structure is derived from Extension
| Name | Flags | Card. | Type | Description & Constraints Filter:   |
|---|---|---|---|---|
  Extension |
0..* | Extension | Medical Subject Category | |
  extension |
0..0 | Extension | ||
| url |
1..1 | uri | "http://fhir.awmf.org/awmf.ig/StructureDefinition/ext-medical-subject-category" | |
  value[x] |
1..1 | CodeableConcept | Value of extension | |
 coding |
0..* | Coding | Code defined by a terminology system Binding: Medical Subject Categories (required) | |
| system |
S | 1..1 | uri | Identity of the terminology system |
 code |
S | 1..1 | code | Symbol in syntax defined by the system |
| Documentation for this format | ||||
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..* | Extension | Medical Subject Category | |
 id |
0..1 | id | Unique id for inter-element referencing | |
| extension |
0..0 | Extension Slice: Unordered, Open by value:url | ||
| url |
Σ | 1..1 | uri | "http://fhir.awmf.org/awmf.ig/StructureDefinition/ext-medical-subject-category" |
| value[x] |
Σ | 1..1 | CodeableConcept | Value of extension |
| id |
0..1 | id | Unique id for inter-element referencing | |
| extension |
0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url | |
 coding |
0..* | Coding | Code defined by a terminology system Binding: Medical Subject Categories (required) | |
 id |
0..1 | id | Unique id for inter-element referencing | |
| extension |
0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url | |
| system |
S | 1..1 | uri | Identity of the terminology system |
| version |
0..1 | string | Version of the system - if relevant | |
| code |
SC | 1..1 | code | Symbol in syntax defined by the system |
| display |
C | 0..1 | string | Representation defined by the system |
| userSelected |
0..1 | boolean | If this coding was chosen directly by the user | |
| text |
0..1 | string | Plain text representation of the concept | |
| Documentation for this format | ||||
This structure is derived from Extension
Differential View
This structure is derived from Extension
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..* | Extension | Medical Subject Category | |
| extension |
0..0 | Extension | ||
| url |
1..1 | uri | "http://fhir.awmf.org/awmf.ig/StructureDefinition/ext-medical-subject-category" | |
| value[x] |
1..1 | CodeableConcept | Value of extension | |
| coding |
0..* | Coding | Code defined by a terminology system Binding: Medical Subject Categories (required) | |
| system |
S | 1..1 | uri | Identity of the terminology system |
| code |
S | 1..1 | code | Symbol in syntax defined by the system |
| Documentation for this format | ||||
Snapshot View
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..* | Extension | Medical Subject Category | |
| id |
0..1 | id | Unique id for inter-element referencing | |
| extension |
0..0 | Extension Slice: Unordered, Open by value:url | ||
| url |
Σ | 1..1 | uri | "http://fhir.awmf.org/awmf.ig/StructureDefinition/ext-medical-subject-category" |
| value[x] |
Σ | 1..1 | CodeableConcept | Value of extension |
| id |
0..1 | id | Unique id for inter-element referencing | |
| extension |
0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url | |
| coding |
0..* | Coding | Code defined by a terminology system Binding: Medical Subject Categories (required) | |
| id |
0..1 | id | Unique id for inter-element referencing | |
| extension |
0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url | |
| system |
S | 1..1 | uri | Identity of the terminology system |
| version |
0..1 | string | Version of the system - if relevant | |
| code |
SC | 1..1 | code | Symbol in syntax defined by the system |
| display |
C | 0..1 | string | Representation defined by the system |
| userSelected |
0..1 | boolean | If this coding was chosen directly by the user | |
| text |
0..1 | string | Plain text representation of the concept | |
| Documentation for this format | ||||
This structure is derived from Extension
Other representations of profile: CSV, Excel, Schematron
Terminology Bindings
| Path | Status | Usage | ValueSet | Version | Source |
| Extension.value[x].coding | Base | required | Medical Subject Categories | 📦0.2.0 | This IG |
Constraints
| Id | Grade | Path(s) | Description | Expression |
| ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children |
hasValue() or (children().count() > id.count())
|
| ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both |
extension.exists() != value.exists()
|