ICD-10 Code D72.9 – Disorder of White Blood Cells, Unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D72.9 – Disorder of white blood cells, unspecified
What it is
D72.9 is used when the record shows a disorder affecting white blood cells, but the type is not named. It is a nonspecific diagnosis for abnormal leukocyte conditions that do not fit a more detailed code.
Clinical signs
Clinical features vary; refer to documentation. Records may describe abnormal white blood cell findings, an unspecified leukocyte disorder, or a white cell problem without further detail.
When to use this code
Use D72.9 when the provider documents a white blood cell disorder but does not identify the specific condition. It also fits when available information is insufficient for a more precise code. Check the chart for a more specific leukocyte diagnosis before defaulting to this code.
Do not use for
Do not use this code when the record identifies a specific white blood cell disorder, such as a named leukocyte abnormality. Do not assign it for normal lab variation or for conditions documented elsewhere as the primary diagnosis.
Coding tip
Query for specificity whenever the note only says “WBC disorder” or “abnormal white cells.”