Infantile papular acrodermatitis [Gianotti-Crosti]

This code represents Gianotti-Crosti syndrome, a self-limiting, papulovesicular skin eruption primarily affecting infants and young children. It is characterized by monomorphic, erythematous papules and papulovesicles symmetrically distributed on the face, buttocks, and extensor surfaces of the extremities. The rash is often associated with viral infections, particularly Epstein-Barr virus or hepatitis B.

Use this code when documentation clearly indicates a diagnosis of Gianotti-Crosti syndrome or infantile papular acrodermatitis. This diagnosis is typically made clinically based on the characteristic rash distribution and morphology in a pediatric patient. Supporting documentation would include a physician's note detailing the rash characteristics, location, and patient age.

• Ensure the documentation specifies "infantile" or "Gianotti-Crosti" to differentiate from other papular dermatoses.
• Do not confuse with other viral exanthems; look for the characteristic acral and facial distribution.
• Code any associated viral infection (e.g., B18.1 for chronic viral hepatitis B) as a secondary diagnosis if documented.