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Compare/L25 vs L27

L25 vs L27

L25 (Unspecified contact dermatitis) compared with L27 (Dermatitis due to substances taken internally), 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. L25 carries an Excludes2 note covering L27: “dermatitis due to ingested substances (L27.-)”

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

Yes, when both are documented. L27 carries an Excludes2 note covering L25: “contact dermatitis (L23-L25)”

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

Side by side

L25Unspecified contact dermatitisL27Dermatitis due to substances taken internally
Billing statusNon-billable header

Report instead: L25.0, L25.1, L25.2, L25.3, L25.4

Non-billable header

Report instead: L27.0, L27.1, L27.2, L27.8, L27.9

ClassificationL00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99)L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99)
DefinitionUnspecified contact dermatitis is a non-billable ICD-10-CM category code (L25).Dermatitis due to substances taken internally is a non-billable ICD-10-CM category code (L27).
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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