ICD-10 is the 10th revision of the International Statistical Classification of Diseases and Related Health Problems (ICD), a medical classification list by the World Health Organization (WHO).
It contains codes for diseases, signs and symptoms, abnormal findings, complaints, social circumstances, and external causes of injury or diseases.
The Anatomical Therapeutic Chemical (ATC) Classification System is used for the classification of active ingredients of drugs according to the organ or system on which they act and their therapeutic, pharmacological and chemical properties.
It is controlled by the World Health Organization Collaborating Centre for Drug Statistics Methodology (WHOCC).
The defined daily dose (DDD) is a statistical measure of drug consumption, defined by the World Health Organization (WHO).
It is used to standardize the comparison of drug usage between different drugs or between different health care environments.