NOMESCO Classification of Surgical Procedures

"The Classification of Surgical Procedures (NCSP) is based on the traditions of the surgical profession in the Nordic countries and reflects surgical practice in these countries in 1994. It constitutes the first common Nordic classification of surgical procedures. In producing this classification attention has been paid to generally accepted requirements for surgical procedure components as seen in concurrent classification development. In addition the classification is designed to give reasonable scope for expansion to meet anticipated future advances in the field of surgical procedures.

American Society of Anesthesiologists Physical Status Classification System

"The purpose of the grading system is simply to assess the degree of a patient’s 'sickness' or 'physical state' prior to selecting the anesthetic or prior to performing surgery. Describing patients’ preoperative physical status is used for recordkeeping, for communicating between colleagues, and to create a uniform system for statistical analysis. The grading system is not intended for use as a measure to predict operative risk."

Operationen- und Prozedurenschlüssel

"Der Operationen- und Prozedurenschlüssel (OPS) ist die amtliche Klassifikation zum Verschlüsseln von Operationen, Prozeduren und allgemein medizinischen Maßnahmen im stationären Bereich und beim ambulanten Operieren."

"The Operations and Procedures Key (OPS) is the official classification for encrypting operations, procedures and general medical procedures in the inpatient area and for outpatient surgery."