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Compare/D71 vs L21

D71 vs L21

D71 (Functional disorders of polymorphonuclear neutrophils) compared with L21 (Seborrheic dermatitis), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).

Can these codes be reported together?

Yes, when both are documented. L21 carries an Excludes2 note covering D71: “chronic (childhood) granulomatous disease (D71-)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Side by side

D71Functional disorders of polymorphonuclear neutrophilsL21Seborrheic dermatitis
Billing statusNon-billable header

Report instead: D71.1, D71.8, D71.9

Non-billable header

Report instead: L21.0, L21.1, L21.8, L21.9

ClassificationD50-D89 — Diseases of the Blood and Blood-forming Organs and Certain Disorders Involving the Immune Mechanism (D50-D89)L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99)
DefinitionFunctional disorders of polymorphonuclear neutrophils is a non-billable ICD-10-CM category code (D71).Seborrheic dermatitis is a non-billable ICD-10-CM category code (L21).
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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources