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Compare/L23 vs L50

L23 vs L50

L23 (Allergic contact dermatitis) compared with L50 (Urticaria), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.

Can these codes be reported together?

No — do not report together. L50 carries an Excludes1 note covering L23: “allergic contact dermatitis (L23.-)”

Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Side by side

L23Allergic contact dermatitisL50Urticaria
Billing statusNon-billable header

Report instead: L23.0, L23.1, L23.2, L23.3, L23.4

Non-billable header

Report instead: L50.0, L50.1, L50.2, L50.3, L50.4

ClassificationL00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99)L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99)
DefinitionAllergic contact dermatitis is a non-billable ICD-10-CM category code (L23).Urticaria is a non-billable ICD-10-CM category code (L50).
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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