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- MMWR Recomm Rep. 1991 Jul 26; 40 (RR-9): 1-18.
AbstractThese addenda for Volumes 1 and 2 of the International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM), are reported by the World Health Organization Collaborating Center for Classification of Diseases for North America at the National Center for Health Statistics. These addenda replace the addendum containing codes for human immunodeficiency virus (HIV) infection (042.0-044.9) that were effective January 1, 1988. These addenda will be effective October 1, 1991, and are the second revision of these codes for the classification of HIV infection. These addenda incorporate minor changes in content of the classification reflecting new scientific knowledge. The structure of the classification, the codes within the classification, and the manner in which the codes may be used remain unchanged. These changes are effective only for morbidity purposes; the cause-of-death codes are unchanged.
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