# Agency Common Components FHIR Implementation Guide

26.0.0 - Trial

Agency Common Components FHIR Implementation Guide, published by Australian Digital Health Agency. This guide is not an authorized publication; it is the continuous build for version 26.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/AuDigitalHealth/CC/ and changes regularly. See the Directory of published versions

## Extension: IAR Levels of Care

Official URL: http://digitalhealth.gov.au/fhir/cc/StructureDefinition/iar-levels-of-care | Version: 26.0.0
Active as of 2026-06-16 | Computable Name: IAR_Levels_Of_Care
Usage:Jurisdiction: Australia
Copyright/Legal: Copyright © 2026 Australian Digital Health Agency - All rights reserved. This content is licensed under a Creative Commons Attribution 4.0 International License. See https://creativecommons.org/licenses/by/4.0/. This resource includes material that is based on Commonwealth of Australia material.

Indicates the IAR (Initial Assessment and Referral) Levels of Care for a healthcare service.

This extension addresses the business requirement to classify mental healthcare services according to the National Initial Assessment and Referral (IAR) framework levels of care, enabling appropriate service matching and referral processes within the provider directory.

Context of Use

This extension may be used on the following element(s)

- Element ID: `HealthcareService`

Usage info

Usages:

- Examples for this Extension: Kath & Kim's Fountain Lakes Wellness Hub

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.

- Differential Table
- Snapshot Table
- Statistics/References
- All

This structure is derived from Extension

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension(4.0.1) | IAR Levels of Care
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "http://digitalhealth.gov.au/fhir/cc/StructureDefinition/iar-levels-of-care"
value[x] |  | 0..1 | CodeableConcept | IAR Levels of Care for the healthcare service. Binding: Initial Assessment and Referral Levels of Care (required)
Documentation for this format

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension(4.0.1) | IAR Levels of Care Constraints: ext-1
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..0 |  | Extension Slice: Unordered, Open by value:url Constraints: ext-1
url |  | 1..1 | uri | "http://digitalhealth.gov.au/fhir/cc/StructureDefinition/iar-levels-of-care"
value[x] |  | 0..1 | CodeableConcept | IAR Levels of Care for the healthcare service. Binding: Initial Assessment and Referral Levels of Care (required)
Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type CodeableConcept: Indicates the IAR (Initial Assessment and Referral) Levels of Care for a healthcare service.

Differential View

This structure is derived from Extension

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension(4.0.1) | IAR Levels of Care
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "http://digitalhealth.gov.au/fhir/cc/StructureDefinition/iar-levels-of-care"
value[x] |  | 0..1 | CodeableConcept | IAR Levels of Care for the healthcare service. Binding: Initial Assessment and Referral Levels of Care (required)
Documentation for this format

Snapshot View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension(4.0.1) | IAR Levels of Care Constraints: ext-1
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..0 |  | Extension Slice: Unordered, Open by value:url Constraints: ext-1
url |  | 1..1 | uri | "http://digitalhealth.gov.au/fhir/cc/StructureDefinition/iar-levels-of-care"
value[x] |  | 0..1 | CodeableConcept | IAR Levels of Care for the healthcare service. Binding: Initial Assessment and Referral Levels of Care (required)
Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type CodeableConcept: Indicates the IAR (Initial Assessment and Referral) Levels of Care for a healthcare service.

Other representations of profile: CSV, Excel, Schematron

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
Extension.value[x] | Base | required | Initial Assessment and Referral Levels of Care | ⏿1.0.0 | tx.hl7.org.au

#### Constraints

Id | Grade | Path(s) | Description | Expression
ele-1 | error | Extension, Extension.value[x] | All FHIR elements must have a @value or children | `hasValue() or (children().count() > id.count())`
ext-1 | error | Extension | Must have either extensions or value[x], not both | `extension.exists() != value.exists()`