ICD-10 Code B00.0 – Eczema herpeticum (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B00.0 – Eczema herpeticum
What it is
B00.0 identifies eczema herpeticum, a disseminated herpes simplex infection occurring on skin affected by eczema or other dermatitis. It is a viral skin complication, not the underlying eczema itself.
Clinical signs
Typical findings include clusters of painful vesicles, punched-out erosions, fever, and widespread involvement of eczematous skin. Clinical features vary; refer to documentation.
When to use this code
Use B00.0 when the record documents eczema herpeticum, Kaposi varicelliform eruption, or herpes simplex infection superimposed on eczema. Code it when the clinician clearly links the herpes infection to the eczematous skin disorder. Check documentation if the note only says herpes or eczema separately.
Do not use for
Do not use B00.0 for uncomplicated eczema, isolated herpes simplex without eczema involvement, or varicella-zoster infection. If the documentation does not show the eczema-herpes relationship, check documentation.
Coding tip
Look for explicit wording that the herpes infection is occurring on eczematous skin before assigning B00.0.