ICD-10 Code L55.2 – Sunburn of third degree (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L55.2 – Sunburn of third degree
What it is
L55.2 identifies a third-degree sunburn, meaning severe skin injury from ultraviolet exposure with full-thickness damage. You use it when the record specifically documents third-degree sunburn.
Clinical signs
Clinical features vary; refer to documentation. Severe sunburn may include marked pain, blistering, swelling, and skin damage that extends deeper than a superficial burn.
When to use this code
Use L55.2 when the clinician documents third-degree sunburn or equivalent wording such as full-thickness sunburn. It may apply after intense sun exposure with severe skin injury. If the degree is not specified, check documentation before assigning this code.
Do not use for
Do not use this code for ordinary sunburn, first-degree, or second-degree sunburn. Do not use it when the chart only says “sunburn” without stating third degree.
Coding tip
Assign L55.2 only when the provider clearly documents third-degree severity; otherwise, query or code the documented degree.