L27 vs L55

L27 (Dermatitis due to substances taken internally) compared with L55 (Sunburn), 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. L27 carries an Excludes2 note covering L55: “radiation-related disorders of the skin and subcutaneous tissue (L55-L59)”

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

Side by side

	L27Dermatitis due to substances taken internally	L55Sunburn
Billing status	Non-billable header Report instead: L27.0, L27.1, L27.2, L27.8, L27.9	Non-billable header Report instead: L55.0, L55.1, L55.2, L55.9
Classification	L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99)	L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99)
Definition	Dermatitis due to substances taken internally is a non-billable ICD-10-CM category code (L27).	Sunburn is a non-billable ICD-10-CM category code (L55).

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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