Eczema herpeticum

This code represents a severe, disseminated viral infection characterized by widespread vesicular eruptions, typically caused by the herpes simplex virus (HSV) in individuals with pre-existing skin conditions, most commonly atopic dermatitis. It involves a rapid spread of HSV lesions beyond the primary infection site, often presenting as punched-out erosions and crusts.

Use this code when documentation clearly indicates a diagnosis of eczema herpeticum, also known as Kaposi's varicelliform eruption. This diagnosis is supported by findings of widespread vesiculopustular lesions, often with a history of underlying dermatological conditions like atopic dermatitis, and confirmed or suspected HSV infection.

• Ensure documentation specifies "herpeticum" to differentiate from other forms of eczema or herpes infections.
• Do not confuse with simple herpes simplex infections (e.g., herpes labialis) or other viral exanthems.
• Consider sequencing this code as the primary diagnosis when it is the main reason for the encounter, especially in acute presentations requiring treatment.