10ICD Code Hub

L21

Header — not billable

Seborrheic dermatitis

The ICD-10 code for seborrheic dermatitis is L21.

L21 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 4 more specific codes below.

Clinical notes

Excludes2 (not included here)

An Excludes2 note means the excluded condition is not part of this one, but a patient can have both at the same time — in that case both codes may be reported together.

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

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

Child codes under L21

Related codes in this category