ICD-10 Code D72.819 – Decreased white blood cell count, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D72.819 – Decreased white blood cell count, unspecified
What it is
This code identifies a documented decrease in white blood cells without a more specific diagnosis. Use it when the record states low white blood cell count or leukopenia, but does not name the cause.
Clinical signs
Clinical features vary; refer to documentation. The key finding is an abnormal white blood cell count noted on laboratory testing, with no further specificity about the underlying disorder.
When to use this code
Use D72.819 when the provider documents decreased white blood cell count, leukopenia, or similar wording and does not identify a more specific condition. It may also apply when the chart confirms the abnormal count, but the cause remains unspecified after evaluation.
Do not use for
Do not use this code when a specific leukopenia cause is documented, such as drug-induced, congenital, or disease-related leukopenia. Check documentation if the record describes a broader blood disorder instead.
Coding tip
Code the most specific documented cause first; use D72.819 only when the decreased white blood cell count is truly unspecified.