L21 vs L85.3
L21 (Seborrheic dermatitis) compared with L85.3 (Xerosis cutis), 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. L21 carries an Excludes2 note covering L85.3: “dry skin dermatitis (L85.3)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| L21Seborrheic dermatitis | L85.3Xerosis cutis | |
|---|---|---|
| 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 | Seborrheic dermatitis is a non-billable ICD-10-CM category code (L21). | Xerosis cutis is a billable ICD-10-CM diagnosis code (L85.3). |
| Includes | — | Dry skin dermatitis |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources