67 lines
4.1 KiB
Markdown
67 lines
4.1 KiB
Markdown
# FHIR to PADneXt Mapping
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This document outlines the mapping from FHIR resources to the PADneXt 2.12 XML format, as implemented in the `fhir_to_pad_converter.py` script.
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## General Mapping Strategy
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The conversion process groups FHIR resources into PADneXt `<Rechnung>` (invoice) elements. The grouping strategy depends on the presence of `Claim` resources in the input FHIR bundle:
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- **Claim-based Grouping:** If `Claim` resources are present, each unique combination of `(patient_id, claim_id)` forms a separate `<Rechnung>`. This is the primary and most structured mapping approach.
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- **Encounter-based Grouping:** If no `Claim` resources are found, the script falls back to grouping resources by `(patient_id, encounter_id)`. Each of these groups becomes a `<Rechnung>`.
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## Header Mapping
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The PADneXt header elements are populated from a combination of a configuration file (`--header-cfg`) and data extracted from FHIR resources. If a `Claim` resource is present, its data overrides the configuration file.
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| PADneXt Element | FHIR Resource & Field | Description |
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| `<rechnungsersteller>` | (from `header_cfg.json`) | Information about the entity creating the invoice. |
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| `<leistungserbringer>` | `Claim.provider` -> `Organization.name` | The healthcare provider who delivered the services. |
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| `<rechnungsempfaenger>` | `Claim.insurer` -> `Organization.name` | The recipient of the invoice, typically an insurance company. |
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## Patient and Case Mapping
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Patient and billing case information is mapped as follows:
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| PADneXt Element | FHIR Resource & Field | Description |
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| `<behandelter>` (Patient) | `Claim.patient` -> `Patient` | The patient who received the care. |
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| `behandelter.vorname` | `Patient.name.given` | Patient's given name. |
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| `behandelter.name` | `Patient.name.family` | Patient's family name. |
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| `behandelter.gebdatum` | `Patient.birthDate` | Patient's date of birth. |
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| `<abrechnungsfall>` | (Generated for each group) | Represents a billing case. |
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| `zeitraum.startdatum` | `min(effective dates)` | The earliest date found across all `effectiveDateTime`, `issued`, `authoredOn`, `date`, and `meta.lastUpdated` fields in the resource group. |
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| `zeitraum.endedatum` | `max(effective dates)` | The latest date found across the same date fields. |
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| `diagnose.text` | `Claim.diagnosis.diagnosisCodeableConcept.coding.display` | The primary diagnosis for the claim. |
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| `diagnose.datum` | `Claim.created` | The creation date of the claim. |
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## Billing Position Mapping (`<goziffer>`)
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Billing positions are created within the `<positionen>` element of each `<abrechnungsfall>`. The mapping logic differs based on whether a `Claim` resource is present.
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### Claim-based Position Mapping
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When a `Claim` resource is available, its `item` entries are mapped directly to `<goziffer>` elements.
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| PADneXt `<goziffer>` Attribute | FHIR `Claim.item` Field | Description |
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| `id` | `sequence` | The sequence number of the item in the claim. |
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| `ziffer` | `productOrService.coding.code` | The billing code for the service or product. |
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| `datum` | `servicedDate` | The date the service was provided. |
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| `text` | `productOrService.coding.display` | The display name of the service or product. |
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| `anzahl` | "1" (hardcoded) | The quantity of the service (currently hardcoded to 1). |
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### Resource-based Position Mapping (Fallback)
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If no `Claim` resource is present, the script iterates through other resources and maps them to billing positions. This is a fallback mechanism.
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**Mappable FHIR Resources:** `Observation`, `MedicationAdministration`, `Procedure`, `ServiceRequest`, `DiagnosticReport`
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| PADneXt `<goziffer>` Attribute | FHIR Field | Description |
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| `id` | `id` | The ID of the FHIR resource. |
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| `ziffer` | `code.coding.code` | The primary code from the resource's `code` element. |
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| `datum` | `effectiveDateTime`, `issued`, `authoredOn`, `date`, or `meta.lastUpdated` | The first available date from a prioritized list of date fields. |
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| `text` | `code.coding.display` or `resourceType` | The display text for the code, or the resource type if no display is available. |
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| `anzahl` | "1" (hardcoded) | The quantity (hardcoded to 1). |
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