L21: Seborrheic dermatitis
Codes under L21 (Seborrheic dermatitis). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| L21.0 | Seborrhea capitis | ✓ |
| L21.0 | Seborrhea capitis | ✓ |
| L21.1 | Seborrheic infantile dermatitis | ✓ |
| L21.1 | Seborrheic infantile dermatitis | ✓ |
| L21.8 | Other seborrheic dermatitis | ✓ |
| L21.8 | Other seborrheic dermatitis | ✓ |
| L21.9 | Seborrheic dermatitis, unspecified | ✓ |
| L21.9 | Seborrheic dermatitis, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code L21?
L21 is an ICD-10-CM category covering Seborrheic dermatitis. It contains 8 more specific diagnosis codes, 8 of which are billable.
Is L21 a billable code?
No — L21 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example L21.0 — Seborrhea capitis). 8 of the 8 codes under L21 are billable.
What codes fall under L21?
L21 includes L21.0, L21.0, L21.1, L21.1, L21.8, plus 3 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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