L08.0 vs L21
L08.0 (Pyoderma) compared with L21 (Seborrheic dermatitis), 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 L08.0: “dermatitis gangrenosa (L08.0)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| L08.0Pyoderma | L21Seborrheic dermatitis | |
|---|---|---|
| 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 | Pyoderma is a billable ICD-10-CM diagnosis code (L08.0). | Seborrheic dermatitis is a non-billable ICD-10-CM category code (L21). |
| Includes | Dermatitis gangrenosa Purulent dermatitis Septic dermatitis Suppurative dermatitis | — |
| Use additional code | code (B95-B97) to identify infectious agent. | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources