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Human immunodeficiency virus (HIV) infection codes and new codes for Kaposi's sarcoma. Official authorized addenda ICD-9-CM (revision no. 2). Effective October 1, 1991.
MMWR. MORBIDITY AND MORTALITY WEEKLY REPORT. 1991 Jul 26; 40(RR-9):1-19.The addenda for Volumes 1 and 2 of the International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM) were reported by the Collaborating Center for Classification of Diseases for North America at the National Center for Health Statistics. This was the second revision of these codes for the classification of HIV infection. THe addenda, effective October 1, 1991, replace the addendum containing codes for human immunodeficiency virus (HIV) infection that went into effect January 1, 1988. The structure of the classification, the codes within the classification, and the use of the codes remained the same. 3 basic modifications were accepted. A new 3-digit category was created for Kaposi's sarcoma; several new clinical conditions were added (acute or subacute endocarditis, microsporidiosis, acute or subacute myocarditis, bacterial and pneumococcal pneumonia, histiocytic or large cell lymphoma, secondary cardiomyopathy and nephritis and nephropathy); and several categories of HIV manifestations were expanded to include similar conditions (viral pneumonia, encephalitis, encephalomyelitis and myelitis). These modifications will improve the accuracy of reporting and allow public health officials, clinical researchers, and agencies which finance health care to monitor diagnoses of AIDS and other manifestations of HIV infection. HIV infection is divided into 3 categories: HIV infection with specified secondary infections or malignant neoplasms, or AIDS; HIV infection with other specified manifestations; and other HIV infections not classifiable above. AIDS is not synonymous with HIV infection or with such terms as pre-AIDS or AIDS-related complex. To use these codes correctly, the physician must provide complete information and state the relationship between HIV infection and other conditions.