ICD-10 Code L56 – Other acute skin changes due to ultraviolet radiation (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L56 – Other acute skin changes due to ultraviolet radiation
What it is
L56 identifies acute skin changes caused by ultraviolet exposure that do not fit a more specific diagnosis. Use it for short-term UV-related reactions when the documentation is broad or nonspecific.
Clinical signs
Findings may include redness, tenderness, swelling, itching, or blistering after sun or artificial UV exposure. Clinical features vary; refer to documentation.
When to use this code
Use this code when the clinician documents an acute UV-related skin reaction but does not name a more specific condition. It is appropriate for nonspecific sun-related skin injury or other acute skin changes attributed to ultraviolet radiation. Check documentation for the exact reaction and exposure source.
Do not use for
Do not use L56 when the record clearly documents a more specific sunburn, photodermatosis, or chronic skin disorder. Do not guess the diagnosis if the note does not support ultraviolet causation.
Coding tip
Code the most specific UV-related skin diagnosis documented, and confirm whether the provider identifies sunburn or another distinct condition.