ICD-10 Code L28.0 – Lichen simplex chronicus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L28.0 – Lichen simplex chronicus
What it is
Lichen simplex chronicus is a localized area of thickened, itchy skin caused by repeated scratching or rubbing. Use this code when the diagnosis is documented as this chronic pruritic dermatitis.
Clinical signs
Typical findings include lichenified, scaly, hyperpigmented, or excoriated plaques, often with a clear history of chronic itching and rubbing. Clinical features vary; refer to documentation.
When to use this code
Use L28.0 when the provider documents lichen simplex chronicus, neurodermatitis, or circumscribed lichenification. It applies when the condition is the primary skin diagnosis being treated or evaluated. If the note only describes itching without this diagnosis, check documentation.
Do not use for
Do not use this code for generalized pruritus, eczema without lichenification, or other specific dermatitis diagnoses. If the record does not clearly support lichen simplex chronicus, check documentation.
Coding tip
Code from the provider’s final diagnosis, not from scratching alone.