AHA Coding Clinic® for ICD-9 - 2006 Issue 4; VOLUMES 1 AND 2 NEW/REVISED CODES

Diseases of White Blood Cells

Effective October 1, 2006, several changes have been made to category 288, Diseases of white blood cells. New codes have been created for different types of neutropenia, hemophagocytic syndromes, decreased white blood cell count and elevated white blood cell count. White blood cells, or leukocytes, play an important role in the body’s immune system by fighting infection. There are several different types of normal white blood cells (WBCs) including neutrophils, lymphocytes, monocytes, eosinophils and basophils. Many different diseases can affect WBC production. Diseases of the white blood cells are primarily classified on the basis of whether...

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