ICD-10 Code L90.9 – Atrophic disorder of skin, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L90.9 – Atrophic disorder of skin, unspecified
What it is
L90.9 identifies an unspecified atrophic disorder of the skin. Use it when documentation states skin atrophy but does not name a more specific type or cause.
Clinical signs
Clinical features vary; refer to documentation. Common descriptions may include thinning, fragility, or loss of normal skin thickness, but you should code only what is documented.
When to use this code
Use L90.9 when the record documents atrophic skin changes without a more precise diagnosis. It may fit general notes describing skin thinning, wasting, or atrophy when the provider does not specify an underlying disorder. Check documentation if the cause is known.
Do not use for
Do not use this code when the chart identifies a specific atrophic skin condition or a clearly documented underlying disease. Do not assign it if the provider’s wording supports a more exact ICD-10 code.
Coding tip
Query the provider when “atrophy” is mentioned without location, cause, or specificity.