Seborrheic dermatitis - L21
Excludes2: This note means that the conditions described by two codes are not usually associated with each other but can sometimes occur together.
Type 2 Excludes:
- infective dermatitis (L30.3)
- seborrheic keratosis (L82.-)
These ranges represents subcategories of Seborrheic dermatitis. The "L21" signifies that these are the diseases within this broad category.