Swiss Operation Classification (CHOP)

As part of the medical statistics, all inpatient hospital stays are recorded. The survey, which is carried out in all hospitals and clinics, includes administrative data and socio-demographic characteristics of patients as well as diagnoses and treatments. To collect this information, two medical classifications are used: the ICD-10-GM for diagnoses and the Swiss surgical classification (CHOP) for the treatments. The coding of diagnoses and treatments is subject to precise guidelines. The Medical Classifications section of the BFS edits, reviews and adapts these guidelines at most, maintains the above-mentioned classifications and supports all those involved in coding. The version 2023 of the systematic list of CHOPs enters into force on 1.1.2023 in Switzerland. The CHOP’s systematic and alphabetical directory appear in German, French and Italian as well as in various formats (PDF, CSV, Print). The German version of the systematic directory is the reference version.