ICD-10 Code L90 – Atrophic disorders of skin (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L90 – Atrophic disorders of skin
What it is
L90 covers noninfectious skin conditions marked by thinning, wasting, or loss of normal skin structure. Use it when documentation describes atrophic changes of the skin rather than a specific named disorder.
Clinical signs
Findings may include thin, fragile, shiny, or wrinkled skin, with reduced elasticity or visible underlying vessels. Clinical features vary; refer to documentation for the exact atrophic disorder.
When to use this code
Use L90 when the provider documents atrophic skin changes, skin wasting, or an atrophic disorder without a more specific diagnosis. It may apply when the record describes localized or generalized thinning of the skin. If the note names a specific condition, code that diagnosis instead.
Do not use for
Do not use L90 for acute skin injury, infection, or ulceration unless the provider also documents atrophy. Do not assume it applies to scars or other skin changes without clear documentation.
Coding tip
Code the most specific atrophic skin diagnosis available, and check documentation if the chart only says “thin skin” or “skin changes.”