L24.A1 vs L27
L24.A1 (Irritant contact dermatitis due to saliva) 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. L24.A1 carries an Excludes2 note covering L27: “dermatitis due to substances taken internally (L27.-)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| L24.A1Irritant contact dermatitis due to saliva | L27Dermatitis due to substances taken internally | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99) | L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99) |
| Definition | Irritant contact dermatitis due to saliva is a billable ICD-10-CM diagnosis code (L24.A1). | Dermatitis due to substances taken internally is a non-billable ICD-10-CM category code (L27). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources