MMWR. Recommendations and reports : Morbidity and mortality weekly report. Recommendations and reports
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These 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. ⋯ 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.