In late October 2020, the BfArM (Federal Institute for Drugs and Medical Devices) has published the final version of the OPS 2021 (Operation and Procedure Keys) system. The OPS, together with the ICD-10-GM (International Statistical Classification of Diseases and Related Health Problems, 10th revision, German Modification), forms the basis for the reimbursement systems in outpatient and inpatient care.