ICD-10 Code L98.6 – Other infiltrative disorders of the skin and subcutaneous tissue (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L98.6 – Other infiltrative disorders of the skin and subcutaneous tissue
What it is
L98.6 identifies infiltrative disorders affecting the skin and subcutaneous tissue that do not fit a more specific diagnosis. Use it for documented conditions where abnormal material or cells infiltrate these tissues.
Clinical signs
Findings may include localized skin thickening, nodules, plaques, or other infiltrative changes on exam or biopsy. Clinical features vary; refer to documentation.
When to use this code
Use L98.6 when the provider documents an infiltrative disorder of the skin or subcutaneous tissue and no more specific ICD-10-CM code applies. It is appropriate when the record describes infiltration, deposition, or similar tissue involvement without a clearer named condition. Check documentation if the diagnosis is uncertain.
Do not use for
Do not use this code for common inflammatory rashes, infections, or neoplasms unless the record specifically states an infiltrative disorder. If a more specific diagnosis is documented, code that condition instead.
Coding tip
Confirm the exact provider wording and pathology or biopsy description before assigning L98.6.