Lichen striatus

This code represents lichen striatus, a benign, self-limiting inflammatory skin condition characterized by a linear eruption of small, flesh-colored, pink, or reddish-brown papules. These papules typically follow Blaschko's lines, often appearing unilaterally on an extremity. The condition is most common in children and young adults.

Use this code when documentation clearly identifies a diagnosis of lichen striatus. This diagnosis is typically made clinically based on the characteristic linear papular rash. Supporting documentation should include a description of the rash's appearance, location, and distribution.

• Differentiate from other linear dermatoses such as linear lichen planus or epidermal nevus.
• Ensure the documentation specifies "lichen striatus" and not a more general term like "dermatitis."
• No laterality is specified for this code; use as is for unilateral or bilateral presentations.