Implementation Guide
ePA Medication Service
Version 1.2.0-ballot.2 - draft

## Data Type Profile: RxPrescriptionProcessIdentifier

Official URL: https://gematik.de/fhir/epa-medication/StructureDefinition/rx-prescription-process-identifier | Version: 1.2.0-ballot.2
Draft as of 2025-09-02 | Computable Name: RxPrescriptionProcessIdentifier

This transaction identifier is used to track medication prescription transactions between the E-Rezept-Fachdienst and the ePA. It is generated by the ePA Medication Service, ensuring a consistent and unique identification of each transaction. The identifier is composed of the PrescriptionId and the authoredOn-date of the operations parameters request, providing a robust mechanism for referencing and managing medication-related resources across systems.

Usages:

- Use this DataType Profile: EPA MedicationRequest and RxPrescriptionProcessIdentifierExtension

You can also check for usages in the FHIR IG Statistics

### Formal Views of Profile Content

Description of Profiles, Differentials, Snapshots and how the different presentations work.

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

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Identifier |  | 0..* | Identifier | An identifier intended for computation
use | ?!Σ | 0..1 | code | usual | official | temp | secondary | old (If known) Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known .
system | S Σ | 1..1 | uri | The namespace for the identifier value Required Pattern: https://gematik.de/fhir/epa-medication/sid/rx-prescription-process-identifier
value | S Σ | 1..1 | string | The value that is unique Example General: 123456
Documentation for this format

#### Terminology Bindings

Path | Conformance | ValueSet | URI
Identifier.use | required | IdentifierUse `http://hl7.org/fhir/ValueSet/identifier-use|4.0.1` From the FHIR Standard

#### Constraints

Id | Grade | Path(s) | Details | Requirements
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count()) |

This structure is derived from Identifier

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Identifier |  |  | Identifier |
system | S | 1..1 | uri | The namespace for the identifier value Required Pattern: https://gematik.de/fhir/epa-medication/sid/rx-prescription-process-identifier
value | S | 1..1 | string | The value that is unique
Documentation for this format

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Identifier |  | 0..* | Identifier | An identifier intended for computation
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
use | ?!Σ | 0..1 | code | usual | official | temp | secondary | old (If known) Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known .
type | Σ | 0..1 | CodeableConcept | Description of identifier Binding: Identifier Type Codes (extensible): A coded type for an identifier that can be used to determine which identifier to use for a specific purpose.
system | S Σ | 1..1 | uri | The namespace for the identifier value Required Pattern: https://gematik.de/fhir/epa-medication/sid/rx-prescription-process-identifier
value | S Σ | 1..1 | string | The value that is unique Example General: 123456
period | Σ C | 0..1 | Period | Time period when id is/was valid for use Constraints: per-1
assigner | Σ C | 0..1 | Reference(Organization) | Organization that issued id (may be just text) Constraints: ref-1
Documentation for this format

#### Terminology Bindings

Path | Conformance | ValueSet | URI
Identifier.use | required | IdentifierUse `http://hl7.org/fhir/ValueSet/identifier-use|4.0.1` From the FHIR Standard
Identifier.type | extensible | Identifier Type Codes `http://hl7.org/fhir/ValueSet/identifier-type` From the FHIR Standard

#### Constraints

Id | Grade | Path(s) | Details | Requirements
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() |
per-1 | error | Identifier.period | If present, start SHALL have a lower value than end : start.hasValue().not() or end.hasValue().not() or (start <= end) |
ref-1 | error | Identifier.assigner | SHALL have a contained resource if a local reference is provided : reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids')) |

This structure is derived from Identifier

Summary

Mandatory: 2 elements
Must-Support: 2 elements

Key Elements View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Identifier |  | 0..* | Identifier | An identifier intended for computation
use | ?!Σ | 0..1 | code | usual | official | temp | secondary | old (If known) Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known .
system | S Σ | 1..1 | uri | The namespace for the identifier value Required Pattern: https://gematik.de/fhir/epa-medication/sid/rx-prescription-process-identifier
value | S Σ | 1..1 | string | The value that is unique Example General: 123456
Documentation for this format

#### Terminology Bindings

Path | Conformance | ValueSet | URI
Identifier.use | required | IdentifierUse `http://hl7.org/fhir/ValueSet/identifier-use|4.0.1` From the FHIR Standard

#### Constraints

Id | Grade | Path(s) | Details | Requirements
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count()) |

Differential View

This structure is derived from Identifier

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Identifier |  |  | Identifier |
system | S | 1..1 | uri | The namespace for the identifier value Required Pattern: https://gematik.de/fhir/epa-medication/sid/rx-prescription-process-identifier
value | S | 1..1 | string | The value that is unique
Documentation for this format

Snapshot View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Identifier |  | 0..* | Identifier | An identifier intended for computation
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
use | ?!Σ | 0..1 | code | usual | official | temp | secondary | old (If known) Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known .
type | Σ | 0..1 | CodeableConcept | Description of identifier Binding: Identifier Type Codes (extensible): A coded type for an identifier that can be used to determine which identifier to use for a specific purpose.
system | S Σ | 1..1 | uri | The namespace for the identifier value Required Pattern: https://gematik.de/fhir/epa-medication/sid/rx-prescription-process-identifier
value | S Σ | 1..1 | string | The value that is unique Example General: 123456
period | Σ C | 0..1 | Period | Time period when id is/was valid for use Constraints: per-1
assigner | Σ C | 0..1 | Reference(Organization) | Organization that issued id (may be just text) Constraints: ref-1
Documentation for this format

#### Terminology Bindings

Path | Conformance | ValueSet | URI
Identifier.use | required | IdentifierUse `http://hl7.org/fhir/ValueSet/identifier-use|4.0.1` From the FHIR Standard
Identifier.type | extensible | Identifier Type Codes `http://hl7.org/fhir/ValueSet/identifier-type` From the FHIR Standard

#### Constraints

Id | Grade | Path(s) | Details | Requirements
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() |
per-1 | error | Identifier.period | If present, start SHALL have a lower value than end : start.hasValue().not() or end.hasValue().not() or (start <= end) |
ref-1 | error | Identifier.assigner | SHALL have a contained resource if a local reference is provided : reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids')) |

This structure is derived from Identifier

Summary

Mandatory: 2 elements
Must-Support: 2 elements

Other representations of profile: CSV, Excel, Schematron