ICD-10 Code L84 – Corns and callosities (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L84 – Corns and callosities
What it is
L84 identifies corns and callosities, which are localized areas of thickened skin caused by repeated pressure or friction. Use it for noninfectious hyperkeratotic lesions on the feet or other pressure points.
Clinical signs
Typical findings include a firm, thickened, yellowish or whitish patch of skin, often with tenderness on pressure. Clinical features vary; refer to documentation.
When to use this code
Use L84 when the record documents corns, calluses, or callosities as the diagnosis. It is appropriate when the provider describes a pressure-related skin thickening without a more specific underlying condition. If the note mentions another primary disorder, code that condition as directed by documentation.
Do not use for
Do not use L84 for infected lesions, ulcers, warts, or other distinct skin disorders. Check documentation if the thickening is part of a different foot deformity or systemic condition.
Coding tip
Confirm the provider specifically documents corns or callosities before assigning L84.