ICD-10 Code L85 – Other epidermal thickening (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L85 – Other epidermal thickening
What it is
L85 identifies other forms of thickening of the outer skin layer that are not classified elsewhere. Use it when the documentation describes epidermal thickening but does not name a more specific diagnosis.
Clinical signs
Findings may include localized or diffuse thickened, rough, or hyperkeratotic skin. Clinical features vary; refer to documentation.
When to use this code
Use L85 when the provider documents epidermal thickening, hyperkeratosis, or similar nonspecific thickening and no more precise code applies. It is appropriate when the record supports a skin-thickening disorder but does not identify a named subtype. Check documentation if another condition explains the finding.
Do not use for
Do not use this code for calluses, corns, or other specific keratotic disorders when a more exact diagnosis is documented. Avoid it if the thickening is part of another defined skin disease.
Coding tip
Code the most specific documented skin condition first; use L85 only when the chart does not support a narrower option.