ICD-10 Code L98.2 – Febrile neutrophilic dermatosis [Sweet] (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L98.2 – Febrile neutrophilic dermatosis [Sweet]
What it is
L98.2 identifies Sweet syndrome, a neutrophilic skin disorder marked by sudden inflammatory skin lesions. Use it when documentation names febrile neutrophilic dermatosis or Sweet syndrome.
Clinical signs
Typical findings include tender, red or violaceous plaques or nodules, often with fever and a neutrophil-rich skin infiltrate. Clinical features vary; refer to documentation.
When to use this code
Use L98.2 when the provider documents Sweet syndrome, febrile neutrophilic dermatosis, or equivalent terminology. It may also be appropriate when the diagnosis is confirmed by pathology and clearly recorded in the chart. If the note only describes a rash without this diagnosis, check documentation.
Do not use for
Do not use this code for nonspecific dermatitis, infection-related skin lesions, or other neutrophilic dermatoses unless Sweet syndrome is documented. Do not assign it from suspicion alone.
Coding tip
Code from the exact diagnosis wording; if the chart says “possible Sweet syndrome,” query before assigning L98.2.