Other functional disorders of polymorphonuclear neutrophils

This code signifies functional abnormalities of polymorphonuclear neutrophils (PMNs) that are not otherwise specified or categorized. These disorders involve impaired PMN function, such as defective chemotaxis, phagocytosis, or oxidative burst, leading to increased susceptibility to infections. It represents a broad category for various intrinsic or acquired defects affecting the immune response mediated by these white blood cells.

Use this code when documentation indicates a functional defect of PMNs, such as impaired bacterial killing or migration, without a more specific diagnosis like chronic granulomatous disease or myeloperoxidase deficiency. It is appropriate for cases where laboratory tests confirm a PMN functional deficit but the precise underlying genetic or acquired cause remains unclassified. Supporting documentation would include abnormal neutrophil function tests and a physician's diagnostic statement.

• Do not use this code if a more specific functional neutrophil disorder (e.g., D71.0-D71.2) is documented.
• Always review the medical record for specific details regarding the type of functional defect to ensure the most precise code is selected.
• Consider sequencing this code as a primary diagnosis when the PMN disorder is the main reason for the encounter, or as a secondary diagnosis when it contributes to other conditions, such as recurrent infections.