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D72.821

✓ Billable

Monocytosis (symptomatic)

Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)

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❌ Excludes1

direct

Cannot be coded with D72.821

  • • infectious mononucleosis (B27.-)

❌ Excludes1

inherited from D72.82

Rules from parent category D72.82: Elevated white blood cell count

  • • eosinophilia (D72.1)

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Code Information

CodeD72.821
BillableYes
ParentD72.82
CategoryDiseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)
Excludes12 rule(s)
Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)