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Classification and external resources
ICD-10 D72.8
ICD-9 288.8
DiseasesDB 22713

Monocytosis is an increase in the number of monocytes circulating in the blood.[1] Monocytes are white blood cells that give rise to macrophages and dendritic cells in the immune system.

In humans, 950/μL is regarded as at the upper limit of normal; monocyte counts above this level are regarded as monocytosis.[citation needed]


Monocytosis often occurs during chronic inflammation. Diseases that produce this state: