ICD-10 Code L56.9 – Acute skin change due to ultraviolet radiation, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L56.9 – Acute skin change due to ultraviolet radiation, unspecified
What it is
This code identifies an acute skin reaction caused by ultraviolet exposure when the exact type is not documented. Use it for a nonspecific UV-related dermatitis or burn-like skin change.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include redness, tenderness, warmth, swelling, or peeling after sun or other UV exposure.
When to use this code
Use L56.9 when the record clearly links the skin change to ultraviolet radiation but does not specify the exact reaction type. It may fit emergency, outpatient, or urgent care notes describing sun exposure with acute skin irritation. Code from the provider’s documented diagnosis, not from exposure alone.
Do not use for
Do not use this code for chronic photosensitivity disorders, confirmed sunburn with a more specific code, or dermatitis unrelated to UV exposure. Check documentation if the cause or reaction type is unclear.
Coding tip
Code the most specific UV-related diagnosis documented; use L56.9 only when the record remains nonspecific.