CH Core (R4)
5.0.0-ci-build - ci-build Switzerland flag

CH Core (R4), published by HL7 Switzerland. This guide is not an authorized publication; it is the continuous build for version 5.0.0-ci-build built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of and changes regularly. See the Directory of published versions


Official URL: Version: 5.0.0-ci-build
Active as of 2024-05-16 Computable Name: CH_Core

Copyright/Legal: CC0-1.0


This implementation guide is provided to support the use of FHIR®© in Switzerland.

This guide is a working specification. We anticipate that it will be implemented and tested by FHIR system producers whose feedback will help improve its content. With this standard for trial use, we are looking for feedback on whether the following goals have been met:

Note: This implementation guide is not (yet) a FHIR API specification, this will be a goal for the next iteration.

This implementation guide is under STU ballot by HL7 Switzerland until September 30th, 2024 midnight.
Please add your feedback via the ‘Propose a change’-link in the footer on the page where you have comments.

Significant changes, open and closed issues.

Download: You can download this implementation guide in NPM format from here.

Relation to the Swiss EPR

The Annexes to the Swiss Electronic Patient Record (EPR) law specify the technical and semantic requirements for interoperability.

Metadata (Annex 3 and Annex 9)

Metadata relating to the Swiss EPR is defined in Annexes 3 and 9 by the Ministry of Health. eHealth Suisse maintains the value sets with additional provided translations in ART-DECOR in the CH-EPR project. All code systems and value sets from the CH-EPR project are exported to the FHIR implementation guide CH Term, which forms the basis for CH Core.

Exchange formats (Annex 4)

Exchange formats for the Swiss EPR are defined in Annex 4. Exchange formats can be represented as FHIR documents.

XDS (Annex 5, Amendment 1)

Requirements for IHE XDS are given in Annex 5. The CH Core DocumentReference Profile EPR defines how metadata used in the EPR is to be mapped to XDS Metadata. Please note that the IHE MHD profile, which includes the document reference resource, is not yet specified in the Annexes, a draft implementation guide is CH EPR mHealth.

CH:ATC Profile (Annex 5, Amendment 2.2)

The CH ATC profile defines the requirements for a patient’s audit trail. CH ATC is a FHIR implementation guide based on FHIR STU3 and R4. There is currently no relationship between CH ATC and CH Core.


This document presents Swiss use concepts defined via FHIR processable artifacts:

  • Profiles - useful constraints of essential FHIR resources and data types for Swiss use.
  • Extensions - FHIR extensions that are added for local use, covering necessary Swiss concepts.
  • Terminology - defined or referenced code systems and value sets for Switzerland.


The CH Core implementation guide is managed by HL7 Switzerland in the HL7 Switzerland FHIR technical committee, see also source.


This guide is the product of collaborative work undertaken with participants from:

Safety Considerations

This implementation guide defines data elements, resources, formats, and methods for exchanging healthcare data between different participants in the healthcare process. As such, clinical safety is a key concern. Additional guidance regarding safety for the specification’s many and various implementations is available at:

Although the present specification does gives users the opportunity to observe data protection and data security regulations, its use does not guarantee compliance with these regulations. Effective compliance must be ensured by appropriate measures during implementation projects and in daily operations. The corresponding implementation measures are explained in the standard. In addition, the present specification can only influence compliance with the security regulations in the technical area of standardization. It cannot influence organizational and contractual matters.

IP Statements

This document is licensed under Creative Commons “No Rights Reserved” (CC0).

HL7®, HEALTH LEVEL SEVEN®, FHIR® and the FHIR ® are trademarks owned by Health Level Seven International, registered with the United States Patent and Trademark Office.

This implementation guide contains and references intellectual property owned by third parties (“Third Party IP”). Acceptance of these License Terms does not grant any rights with respect to Third Party IP. The licensee alone is responsible for identifying and obtaining any necessary licenses or authorizations to utilize Third Party IP in connection with the specification or otherwise.

This publication includes IP covered under the following statements.

Cross Version Analysis

This is an R4 IG. None of the features it uses are changed in R4B, so it can be used as is with R4B systems. Packages for both R4 ( and R4B ( are available.

Dependency Table

Package hl7.fhir.uv.extensions.r4#5.1.0

This IG defines the global extensions - the ones defined for everyone. These extensions are always in scope wherever FHIR is being used (built Sat, Apr 27, 2024 18:39+1000+10:00)

Package hl7.fhir.uv.extensions.r4#1.0.0

This IG defines the global extensions - the ones defined for everyone. These extensions are always in scope wherever FHIR is being used (built Sun, Mar 26, 2023 08:46+1100+11:00)

Package ihe.formatcode.fhir#1.2.0

Implementation Guide for IHE defined FormatCode vocabulary. (built Tue, Mar 12, 2024 16:59-0500-05:00)


Implementation Guide for Swiss Terminology (built Thu, May 16, 2024 10:33+0000+00:00)

Globals Table

There are no Global profiles defined