ICD-10 Code L98.3 – Eosinophilic cellulitis [Wells] (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L98.3 – Eosinophilic cellulitis [Wells]
What it is
L98.3 identifies eosinophilic cellulitis, also called Wells syndrome. It is an inflammatory skin condition that can resemble bacterial cellulitis but is not caused by infection.
Clinical signs
Typical findings include red, swollen, tender plaques or patches, often with itching or burning. Clinical features vary; refer to documentation, and look for mention of eosinophilic infiltration or Wells syndrome.
When to use this code
Use L98.3 when the provider documents eosinophilic cellulitis, Wells syndrome, or an equivalent diagnosis. Apply it when the record supports a noninfectious inflammatory skin process rather than routine cellulitis. If the note only says “cellulitis,” check documentation before coding.
Do not use for
Do not use this code for bacterial cellulitis, abscess, or other confirmed skin infections. Do not assume Wells syndrome without explicit provider documentation or supporting clinical wording.
Coding tip
Confirm the exact diagnosis in the assessment, because Wells syndrome is often documented separately from infectious cellulitis.