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 2018.
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.
OPS consists of two parts:
The preface of OPS contains information for its use. However, priority in application has to be given to sector-specific encoding guidelines.
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 DIMDI.