FiscaAI/chop-sys

English Translation:

Federal Department of the Interior (EDI)
Federal Statistical Office (BFS)
Department of Health and Social Affairs
Medical Classifications

Swiss Classification of Operations (CHOP) - Systematic Directory - Version 2025 from 31.07.2024

Validity: Version 2025 of the CHOP will be effective from 01.01.2025, and its application is mandatory for coding treatments within the framework of the Hospital Inpatient Health Care Survey (SpiGes). The German version of the systematic directory is the reference version.
Languages and Formats: The systematic directory of CHOP 2025 will be published in three languages (German, French, and Italian) and will be available in various formats (PDF, CSV, Print).
Basis and Further Information: See the introduction of the Swiss Classification of Operations (CHOP) - Systematic Directory - Version 2025 in PDF format.

Table of Systematics with CHANGE-LOG - definitive version from 31.07.2025 in German

Field	Description
nbchar	Indicates the number of characters in the corresponding codes, excluding the prefix “C” or “Z” and separators.
zcode	CHOP code with the prefix “C” for chapters and “Z” for all subordinate codes.
item type	This letter indicates the type of description for the current line:
          B: “Supplementary Description” of the code, e.g., synonyms, alternative names	
          I: “Inclusive”, procedures included in this code.	
          N: “Note”, aspects to consider regarding this code, e.g., minimum characteristics.	
          S: “Code also”, indicates procedures or additional codes that must be coded if performed or applicable.	
          T: “Title”, indicates the level of a treatment code (category title, 3-digit category, subcategory, element group, or element).	
          X: “Exclusive”, indicates that a procedure typically expected under a certain class is classified under another class. That means the listed procedure in the Exclusive is not found in the class under which it is listed. The procedures listed in the Exclusive must be classified under the code given there. However, the codes are not strictly exclusive. “Exclusive - code omission” excludes the joint coding of two codes at time X for location Y.	
text	Text for item types (Code title (T) and supplementary information for the code (BINSX)).
codable	Indicates whether a code is codable at the title level (“oui” or “complement”) or not (“non”). The “complement” marking points to additional codes. For item types BINSX, the value “non” is the default. The value at the title level is significant.
emitter	Publisher of the code.
status	Indicates changes to an item compared to the direct predecessor version of CHOP with the following distinctions:
        0 = no change from the previous version	
        1 = shows newly added titles/codes for item type “T”. For all other item types, status 1 indicates both added and modified items.	
        2 = Modification of existing titles/codes (changes in text, linguistic adjustments, laterality, “complement” marking).	
modification date	Date of expansion, modification, or correction.
indent level	Level of the classification hierarchy.
laterality	Laterality. Indicates with “Lateral” at the title level when laterality must be captured for this code. If the “Lateral” indication is missing, capturing laterality is optional.


Technical Note
Handling of line breaks in the CHOP-CSV output:
In the CSV file, lines are broken by CR LF (Carriage Return Line Feed). This applies to both:

The transition to the next item, and
Line breaks within a text.
Texts with line breaks begin with a quotation mark "" and end with a closing quotation mark "". The quotation marks related to the text are output as « and ».
When using Microsoft® Excel®, these line breaks are correctly displayed when the file is opened by “double-clicking.”
When using “Excel -> Open File” or the function “Data -> from Text,” line breaks within a text will generate a new row instead of breaking the text within the cell.
Character Format: UTF-8

Federal Statistical Office, Medical Classifications
Contact: Coding Secretariat of the BFS (codeinfo@bfs.admin.ch)
© BFS - 2024