ICD-10 Code L30.0 – Nummular Dermatitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L30.0 – Nummular dermatitis
What it is
Nummular dermatitis is an inflammatory skin condition marked by coin-shaped patches of eczema. You use this code when documentation identifies this specific dermatitis pattern.
Clinical signs
Typical findings include round or oval, itchy, scaly plaques that may ooze, crust, or become red and irritated. Clinical features vary; refer to documentation.
When to use this code
Use L30.0 when the provider documents nummular eczema, discoid eczema, or nummular dermatitis. Apply it for confirmed cases described by lesion shape and distribution. If the note only says “eczema” without a type, check documentation before coding.
Do not use for
Do not use this code for other specified dermatitis types, such as contact or atopic dermatitis, unless the record specifically states nummular dermatitis. Do not assume the diagnosis from appearance alone.
Coding tip
Code the exact dermatitis type documented; when the chart is nonspecific, query for clarification.