ACT-NOW Implementation Guide
0.5.0 - ci-build

ACT-NOW Implementation Guide, published by Te aho o te kahu - Cancer Control Agency. This guide is not an authorized publication; it is the continuous build for version 0.5.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/tewhatuora/actnow/ and changes regularly. See the Directory of published versions

## Extension: RegimenDiscontinued

Official URL: http://canshare.co.nz/fhir/StructureDefinition/an-regimen-discontinued | Version: 0.5.0
Draft as of 2026-06-15 | Computable Name: RegimenDiscontinued

Reasons why a regimen may have been discontinued

Context of Use

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

- Element ID: `CarePlan`

Usage info

Usages:

- Use this Extension: Regimen Careplan
- Examples for this Extension: CarePlan/careplan-regimen-2

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 | Extension
Slices for extension |  |  |  | Content/Rules for all slices
extension:reason |  | 0..1 | Extension | The overall reason why the regimen was discontinued
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "reason"
value[x] |  | 0..1 | CodeableConcept | Value of extension Binding: The reason why a regimen was discontinued (preferred)
extension:patientfactors |  | 0..* | Extension | Patient factors that contributed to the discontinuation
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "patientfactors"
value[x] |  | 0..1 | CodeableConcept | Value of extension Binding: Patient factors when discontinuing a regimen (preferred)
extension:toxicity |  | 0..* | Extension | Toxicity factors that contributed to the discontinuation
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "toxicity"
value[x] |  | 0..1 | CodeableConcept | Value of extension Binding: Toxicity reasons why a regimen was discontinued (preferred)
url |  | 1..1 | uri | "http://canshare.co.nz/fhir/StructureDefinition/an-regimen-discontinued"
value[x] |  | 0..0 |  | Value of extension
Documentation for this format

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | Extension
id |  | 0..1 | string | Unique id for inter-element referencing
Slices for extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
extension:reason |  | 0..1 | Extension | The overall reason why the regimen was discontinued
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..0 |  | Extension Slice: Unordered, Open by value:url
url |  | 1..1 | uri | "reason"
value[x] |  | 0..1 | CodeableConcept | Value of extension Binding: The reason why a regimen was discontinued (preferred)
extension:patientfactors |  | 0..* | Extension | Patient factors that contributed to the discontinuation
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..0 |  | Extension Slice: Unordered, Open by value:url
url |  | 1..1 | uri | "patientfactors"
value[x] |  | 0..1 | CodeableConcept | Value of extension Binding: Patient factors when discontinuing a regimen (preferred)
extension:toxicity |  | 0..* | Extension | Toxicity factors that contributed to the discontinuation
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..0 |  | Extension Slice: Unordered, Open by value:url
url |  | 1..1 | uri | "toxicity"
value[x] |  | 0..1 | CodeableConcept | Value of extension Binding: Toxicity reasons why a regimen was discontinued (preferred)
url |  | 1..1 | uri | "http://canshare.co.nz/fhir/StructureDefinition/an-regimen-discontinued"
Documentation for this format

This structure is derived from Extension

Summary

Complex Extension: Reasons why a regimen may have been discontinued

- reason: CodeableConcept: The overall reason why the regimen was discontinued
- patientfactors: CodeableConcept: Patient factors that contributed to the discontinuation
- toxicity: CodeableConcept: Toxicity factors that contributed to the discontinuation

Differential View

This structure is derived from Extension

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | Extension
Slices for extension |  |  |  | Content/Rules for all slices
extension:reason |  | 0..1 | Extension | The overall reason why the regimen was discontinued
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "reason"
value[x] |  | 0..1 | CodeableConcept | Value of extension Binding: The reason why a regimen was discontinued (preferred)
extension:patientfactors |  | 0..* | Extension | Patient factors that contributed to the discontinuation
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "patientfactors"
value[x] |  | 0..1 | CodeableConcept | Value of extension Binding: Patient factors when discontinuing a regimen (preferred)
extension:toxicity |  | 0..* | Extension | Toxicity factors that contributed to the discontinuation
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "toxicity"
value[x] |  | 0..1 | CodeableConcept | Value of extension Binding: Toxicity reasons why a regimen was discontinued (preferred)
url |  | 1..1 | uri | "http://canshare.co.nz/fhir/StructureDefinition/an-regimen-discontinued"
value[x] |  | 0..0 |  | Value of extension
Documentation for this format

Snapshot View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | Extension
id |  | 0..1 | string | Unique id for inter-element referencing
Slices for extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
extension:reason |  | 0..1 | Extension | The overall reason why the regimen was discontinued
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..0 |  | Extension Slice: Unordered, Open by value:url
url |  | 1..1 | uri | "reason"
value[x] |  | 0..1 | CodeableConcept | Value of extension Binding: The reason why a regimen was discontinued (preferred)
extension:patientfactors |  | 0..* | Extension | Patient factors that contributed to the discontinuation
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..0 |  | Extension Slice: Unordered, Open by value:url
url |  | 1..1 | uri | "patientfactors"
value[x] |  | 0..1 | CodeableConcept | Value of extension Binding: Patient factors when discontinuing a regimen (preferred)
extension:toxicity |  | 0..* | Extension | Toxicity factors that contributed to the discontinuation
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..0 |  | Extension Slice: Unordered, Open by value:url
url |  | 1..1 | uri | "toxicity"
value[x] |  | 0..1 | CodeableConcept | Value of extension Binding: Toxicity reasons why a regimen was discontinued (preferred)
url |  | 1..1 | uri | "http://canshare.co.nz/fhir/StructureDefinition/an-regimen-discontinued"
Documentation for this format

This structure is derived from Extension

Summary

Complex Extension: Reasons why a regimen may have been discontinued

- reason: CodeableConcept: The overall reason why the regimen was discontinued
- patientfactors: CodeableConcept: Patient factors that contributed to the discontinuation
- toxicity: CodeableConcept: Toxicity factors that contributed to the discontinuation

Other representations of profile: CSV, Excel, Schematron

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
Extension.extension:reason.​value[x] | Base | preferred | The reason why a regimen was discontinued | 📦0.5.0 | This IG
Extension.extension:patientfactors.​value[x] | Base | preferred | Patient factors when discontinuing a regimen | 📦0.5.0 | This IG
Extension.extension:toxicity.​value[x] | Base | preferred | Toxicity reasons why a regimen was discontinued | 📦0.5.0 | 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()`