Implementation Guide
ePA Medication Service
Version 1.3.0 - release

## Extension: MedicationIngredientAmountExtensions

Official URL: https://gematik.de/fhir/epa-medication/StructureDefinition/medication-ingredient-amount-extension | Version: 1.3.0
Active as of 2025-12-15 | Computable Name: MedicationIngredientAmountExtensions
Copyright/Legal: gematik GmbH / Dieses Artefakt ist lizenziert unter Apache License, Version 2.0.

Free-text amount of the ingredient for classical Latin notations such as “ad 100.0” or “quantum satis,” including the unit.

Context of Use

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

- Element ID Element

Usage info

Usages:

- Use this Extension: EPA Pharmaceutical Product Medication, EPA Medication PZN Ingredient and EPA Medication

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.

- Text Summary
- Differential Table
- Snapshot Table
- All

This structure is derived from Extension

Summary

Simple Extension with the type string: Free-text amount of the ingredient for classical Latin notations such as "ad 100.0" or "quantum satis," including the unit.

This structure is derived from Extension

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | Extension
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "https://gematik.de/fhir/epa-medication/StructureDefinition/medication-ingredient-amount-extension"
value[x] |  | 1..1 | string | Free-text amount of an ingredient in a formulation. Max Length:20
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
extension |  | 0..0 |  | Extension Slice: Unordered, Open by value:url
url |  | 1..1 | uri | "https://gematik.de/fhir/epa-medication/StructureDefinition/medication-ingredient-amount-extension"
value[x] |  | 1..1 | string | Free-text amount of an ingredient in a formulation. Max Length:20
Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type string: Free-text amount of the ingredient for classical Latin notations such as "ad 100.0" or "quantum satis," including the unit.

Differential View

This structure is derived from Extension

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | Extension
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "https://gematik.de/fhir/epa-medication/StructureDefinition/medication-ingredient-amount-extension"
value[x] |  | 1..1 | string | Free-text amount of an ingredient in a formulation. Max Length:20
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
extension |  | 0..0 |  | Extension Slice: Unordered, Open by value:url
url |  | 1..1 | uri | "https://gematik.de/fhir/epa-medication/StructureDefinition/medication-ingredient-amount-extension"
value[x] |  | 1..1 | string | Free-text amount of an ingredient in a formulation. Max Length:20
Documentation for this format

Other representations of profile: CSV, Excel, Schematron

#### 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()`