ICD-10 Code L59.8 – Other specified disorders of the skin and subcutaneous tissue related to radiation (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L59.8 – Other specified disorders of the skin and subcutaneous tissue related to radiation
What it is
L59.8 identifies skin or subcutaneous tissue disorders caused by radiation exposure that do not fit a more specific radiation-related code. Use it when documentation describes a radiation effect, but the exact condition is not otherwise classified.
Clinical signs
Clinical features vary; refer to documentation. Findings may include localized skin changes after radiation, such as erythema, dryness, pigmentation change, or tissue injury, when the record links them to radiation.
When to use this code
Use this code when the provider documents a radiation-related disorder of the skin or subcutaneous tissue and no more specific ICD-10-CM option applies. It may fit sequelae or unusual presentations after therapeutic or accidental radiation exposure. Check documentation for the causal link and the exact site involved.
Do not use for
Do not use L59.8 for ordinary dermatitis, burns, or unspecified skin conditions without a documented radiation cause. If the chart names a more specific radiation injury code, code that instead.
Coding tip
Confirm that the note explicitly ties the skin disorder to radiation; if the cause is unclear, check documentation before assigning L59.8.