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L21

⚠ Non-billable (Header)

Seborrheic dermatitis

Diseases of the skin and subcutaneous tissue (L00-L99)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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⚠️ Excludes2

direct

May be coded together if both conditions coexist

  • • infective dermatitis (L30.3)
  • • seborrheic keratosis (L82.-)

Child Codes (4)

L21.0Seborrhea capitisL21.1Seborrheic infantile dermatitisL21.8Other seborrheic dermatitisL21.9Seborrheic dermatitis, unspecified

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Code Information

CodeL21
BillableNo — Header code
CategoryDiseases of the skin and subcutaneous tissue (L00-L99)
Excludes10 rule(s)
Excludes22 note(s)
Child codes4

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)