ICD-10 Code L90.0 – Lichen sclerosus et atrophicus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L90.0 – Lichen sclerosus et atrophicus
What it is
L90.0 identifies lichen sclerosus et atrophicus, a chronic inflammatory skin disorder that causes thinning and whitening of affected skin. It is commonly documented in genital or anogenital sites, but can occur elsewhere.
Clinical signs
Typical findings include porcelain-white patches, skin fragility, itching, burning, or discomfort. Clinical features vary; refer to documentation when the diagnosis is based on exam, biopsy, or specialist assessment.
When to use this code
Use L90.0 when the provider documents lichen sclerosus et atrophicus or lichen sclerosus without a more specific site code. Apply it for confirmed disease affecting skin or mucosa, especially when the note describes chronic atrophic, white, or sclerotic lesions.
Choose this code when the record clearly supports the diagnosis and no alternate condition better explains the findings. Check documentation if the note only mentions pruritus, rash, or irritation without naming lichen sclerosus.
Do not use for
Do not use L90.0 for nonspecific dermatitis, vitiligo, or other causes of hypopigmented skin. If the documentation does not confirm lichen sclerosus, check documentation.
Coding tip
Code only when the diagnosis is stated or clearly supported in the record, and verify whether a more specific anatomic code is available.