L24 vs L30.9
L24 (Irritant contact dermatitis) compared with L30.9 (Dermatitis, unspecified), 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. L24 carries an Excludes1 note covering L30.9: “dermatitis NOS (L30.9)”
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
| L24Irritant contact dermatitis | L30.9Dermatitis, unspecified | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| 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 is a non-billable ICD-10-CM category code (L24). | Dermatitis, unspecified is a billable ICD-10-CM diagnosis code (L30.9). |
| Includes | — | Eczema NOS |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources