DIMDI - Basic information on ICD-9

ICD-9 - International Classification of Diseases, 9th Revision

The abbreviation ICD means International Classification of Diseases; the number 9 signifies its 9th. Revision. This classification was published by the World Health Organization (WHO) and translated into German by DIMDI. ICD-9 was used util 1997 for mortality statistics and until 1999 for morbidity coding in the German hospitals (version 6.0). For both applications is has been replaced by ICD-10 which is more current.

ICD-9 consists of two parts published in three volumes.

• Volume I, Part A contains an introduction, the List of Three Character Categories, the Tabular List of Inclusions and Exclusions and the Morphology of Neoplasms.
• Volume I, Part B contains a general introduction into ICD, the coding guidelines for mortality and morbidity with numerous exanples and two supplementary classifications:
  • External Causes of Injuriesy and Poisoning (E codes)
  • Factors Influencing Health Status and Contact with Health Services (V codes)
• Volume II contains the Alphabetical Index with many diagnoses, causes of injuries and cases of poisoning and adverse effects of drugs and chemical substances, all coded by ICD-9.

A 3 volume adaptation with more specific codes is in use in hospitals of the United States of America: The International Classification of Diseases, 9th revision, Clinical Modification (ICD-9-CM). As in the WHO edition, volume I contains the Tabular List and volume II the Alphabetical Index. The additional volume III contains a classification of medical and surgical procedures with a tabular list and an index.

• ICD-10
• ICD-9-CM
• WHO