Pityriasis alba

Pityriasis alba is a common, benign, and self-limiting skin condition characterized by hypopigmented (lighter than surrounding skin), often finely scaled patches, primarily affecting the face and upper extremities. It is considered a mild form of atopic dermatitis, though its exact etiology is unknown.

This code is appropriate for documenting a diagnosis of pityriasis alba based on clinical examination. It should be used when the provider's documentation clearly identifies these characteristic hypopigmented, sometimes scaly, patches, especially in pediatric or adolescent patients.

• Ensure documentation specifies "pityriasis alba" to differentiate from other hypopigmented lesions.
• Do not confuse with vitiligo or tinea versicolor, which have distinct clinical presentations and coding.
• Consider co-coding with atopic dermatitis (L20.-) if the patient has a confirmed history or concurrent diagnosis.