The International Classification of Diseases 9th Revision Clinical Modification ICD 9CM

The International Classification of Diseases, 9th Revision, Clinical Modification
(ICD- 9- CM) is based on the official version of the World Health Organization's
9th Revision, International Classification of Diseases (ICD- 9). ICD- 9 is designed
for the classification of morbidity and mortality information for statistical
purposes, and for the indexing of hospital records by disease and operations, for
data storage and retrieval. The historical background of the International
Classification of Diseases may be found in the Introduction to ICD- 9 (Manual of
the International Classification of Diseases, Injuries, and Causes of Death, World
Health Organization, Geneva, Switzerland, 1977).
ICD- 9- CM is a clinical modification of the World Health Organization's
International Classification of Diseases, 9th Revision (ICD- 9). The term "clinical" is
used to emphasize the modification's intent: to serve as a useful tool in the area
of classification of morbidity data for indexing of medical records, medical care
review, and ambulatory and other medical care programs, as well as for basic
health statistics. To describe the clinical picture of the patient, the codes must be
more precise than those needed only for statistical groupings and trend analysis.
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