ICD-10 Code L58.0 – Acute Radiodermatitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L58.0 – Acute radiodermatitis
What it is
Acute radiodermatitis is an immediate skin reaction caused by exposure to radiation, usually after therapeutic radiation. It refers to inflammation of the skin in the treated area.
Clinical signs
Typical findings include redness, tenderness, swelling, and dry or moist skin changes in the irradiated field. Clinical features vary; refer to documentation.
When to use this code
Use L58.0 when the record clearly documents acute radiation-related skin inflammation, especially during or soon after radiation therapy. Code it when the provider identifies the condition as radiodermatitis or an acute radiation skin reaction. Check documentation if the note only mentions nonspecific skin irritation.
Do not use for
Do not use this code for chronic radiation skin effects, burns from other causes, or unspecified dermatitis without a radiation link. Check documentation.
Coding tip
Confirm the reaction is acute and tied to radiation exposure before assigning L58.0.