<P> The ICD - 6, published in 1949, was the first to be shaped to become suitable for morbidity reporting . Accordingly, the name changed from International List of Causes of Death to International Statistical Classification of Diseases . The combined code section for injuries and their associated accidents was split into two, a chapter for injuries, and a chapter for their external causes . With use for morbidity there was a need for coding mental conditions, and for the first time a section on mental disorders was added . </P> <P> The international Conference for the Seventh Revision of the International Classification of Diseases was held in Paris under the auspices of WHO in February 1955 . In accordance with a recommendation of the WHO Expert Committee on Health Statistics, this revision was limited to essential changes and amendments of errors and inconsistencies . </P> <P> The Eighth Revision Conference convened by WHO met in Geneva, from 6 to 12 July 1965 . This revision was more radical than the Seventh but left unchanged the basic structure of the Classification and the general philosophy of classifying diseases, whenever possible, according to their etiology rather than a particular manifestation . During the years that the Seventh and Eighth Revisions of the ICD were in force, the use of the ICD for indexing hospital medical records increased rapidly and some countries prepared national adaptations which provided the additional detail needed for this application of the ICD . In the USA, a group of consultants was asked to study the 8th revision of ICD (ICD - 8a) for its applicability to various users in the United States . This group recommended that further detail be provided for coding hospital and morbidity data . The American Hospital Association's "Advisory Committee to the Central Office on ICDA" developed the needed adaptation proposals, resulting in the publication of the International Classification of Diseases, Adapted (ICDA). In 1968, the United States Public Health Service published the International Classification of Diseases, Adapted, 8th Revision for use in the United States (ICDA - 8a). Beginning in 1968, ICDA - 8a served as the basis for coding diagnostic data for both official morbidity (and mortality) statistics in the United States . </P> <P> The International Conference for the Ninth Revision of the International Classification of Diseases, convened by WHO, met in Geneva from 30 September to 6 October 1975 . In the discussions leading up to the conference, it had originally been intended that there should be little change other than updating of the classification . This was mainly because of the expense of adapting data processing systems each time the classification was revised . </P>

When was the international classification of diseases first adopted by the united states