The German procedure classification (Operationen- und Prozedurenschlüssel - OPS) is the official classification for the encoding of operations, procedures and general medical measures.
The currently valid version is OPS 2020.
Official classification for operations and procedures
DIMDI publishes the OPS classification on behalf of the Federal Ministry of Health; it is in the public domain. Its use in inpatient care is laid down in § 301 Volume V of the German Social Security Code (SGB V) and for surgical procedures in the outpatient sector in § 295 SGB V.
Structure of OPS
OPS consists of two parts:
- Tabular List: consisting of the hierarchically ordered list of codes together with supplementary information: The preface contains information about the encoding process and a commentary on the most important changes compared to the previous version. The appendix contains instructions on the calculation of expenditure points for complex intensive care treatment and the German complex nursing measures score (PKMS).
- Alphabetical Index: consisting of the alphabetically ordered list of almost all operations and procedures (with their respective codes) from the Tabular List plus an introduction to the Alphabetical Index.
The preface of OPS contains information for its use. However, priority in application has to be given to sector-specific encoding guidelines.
Proposal procedure for OPS and ICD-10-GM
OPS is maintained and updated in an elaborate process. At present, this is based on a proposal procedure conducted annually under the lead management of BfArM.