ISiK Stufe 3 data objects overview

ISiK Stufe 3 groups the information a hospital needs to exchange into twelve data objects. Each one maps to a standard FHIR resource, so systems built on Kodjin can rely on one consistent interface instead of a different message format for every source system.

Category	Data object (German)	FHIR resource	What it represents
Patient & care team	Patient	Patient	The patient's identifying and demographic details
Patient & care team	Kontakt/Fall	Encounter	A single visit or stay: admission, transfer, discharge
Patient & care team	Angehöriger	RelatedPerson	A person connected to the patient, typically for insurance or payment purposes
Patient & care team	Person im Gesundheitsberuf	Practitioner	The clinician who performed or documented a piece of care
Clinical documentation	Diagnose	Condition	A patient's diagnoses
Clinical documentation	Prozedur	Procedure	Procedures performed on or planned for a patient
Billing & insurance	Abrechnungsfall	Account	The billing case a patient's services are grouped and charged under
Billing & insurance	Versicherungsverhältnis	Coverage	The patient's insurance relationship
Reports & documents	Bericht aus Subsystemen	Composition (as a document Bundle)	A structured report sent back from a hospital subsystem, e.g. lab or radiology
Reports & documents	Binary	Binary	File attachments referenced by other data objects, such as a PDF or scanned image
Supporting terminology	Katalog	CodeSystem	A hospital's own internal codes, published so other systems can interpret them
Supporting terminology	ValueSet	ValueSet	A curated list of allowed values built from standard and/or internal codes

Reports from hospital subsystems (Bericht aus Subsystemen) are treated differently from the other data objects: ISiK requires them to be submitted as one complete document, not built up field by field. See the "Bericht aus Subsystemen (Document Bundle)" page for how Kodjin handles this.