ICD-10 Code L55.9 – Sunburn, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L55.9 – Sunburn, unspecified
What it is
L55.9 identifies sunburn when the record does not specify the depth, extent, or exact degree of the burn. Use it for UV-related skin injury documented simply as sunburn.
Clinical signs
Typical findings include red, painful, warm skin after sun exposure, sometimes with swelling or blistering. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents sunburn but gives no further detail. It also fits when the chart confirms sun exposure with a sunburn diagnosis, yet no site, degree, or severity is recorded.
If the note specifies a more detailed burn description, code that instead. Check documentation for involved body areas and any stated complications.
Do not use for
Do not use L55.9 for other burn types, chemical burns, or allergic skin reactions. Do not use it when the record clearly identifies a different sunburn code.
Coding tip
Query for location, severity, and extent if the note only says “burn” or “skin irritation.”