<unk>  (in earlier versions:<unk> , the Operationen- und Prozedurenschlüssel (Operation and Procedure Classification System) is the German modification of the International Classification of Procedures in Medicine (ICPM). For German hospitals it is currently the official coding system for medical procedures. Apart from its use for clinical controlling and performance statistics it is a basis for inpatient claims processing within the German Diagnosis-related Groups (G-DRG) system. Yearly<unk>  releases are produced by DIMDI (Deutsches Institut für Medizinische Dokumentation und Information). Besides<unk> , G-DRG also requires disease codes based on ICD-10-GM is (the German Modification of the current WHO standard).
OPS-301
HU-308
LAE-32
ARCT-154
BIM-1
OSU-6162
AP-7 
VIR-576