ICD-10 Code L28 – Lichen simplex chronicus and prurigo (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L28 – Lichen simplex chronicus and prurigo
What it is
L28 covers lichen simplex chronicus and prurigo, a group of itchy skin conditions marked by persistent scratching or rubbing. Use it when the record identifies this diagnosis rather than a more specific subtype.
Clinical signs
Typical findings include localized thickened, lichenified skin with excoriations from repeated scratching. Clinical features vary; refer to documentation for the exact pruritic or prurigo presentation.
When to use this code
Use L28 when the provider documents lichen simplex chronicus or prurigo without a more specific code. It also fits notes describing chronic itch with skin thickening or scratch-related lesions, if that is the stated diagnosis. Check documentation when the chart uses a broader dermatitis or rash term.
Do not use for
Do not use this code for nonspecific pruritus alone or for skin disease not documented as lichen simplex chronicus or prurigo. If another condition explains the lesions, code that condition instead.
Coding tip
Code from the provider’s exact wording, and query if the note mentions chronic itching or lichenification but does not name L28.