ICD-10 Code L13.8 – Other specified bullous disorders (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L13.8 – Other specified bullous disorders
What it is
L13.8 identifies bullous skin disorders that do not fit a more specific ICD-10 category. Use it for documented blistering conditions when the record names an “other specified” bullous disorder.
Clinical signs
These conditions typically involve blistering or bullae on the skin or mucous membranes. Clinical features vary; refer to documentation for the exact pattern, distribution, and any associated inflammation.
When to use this code
Use L13.8 when the clinician documents a specific bullous disorder that is not named elsewhere in ICD-10-CM. It may apply when the diagnosis is clearly described but no more precise code exists. Check documentation if the chart only says “blistering” without a qualifying diagnosis.
Do not use for
Do not use this code for common blisters, burns, or traumatic skin injury. Also avoid it when a more specific bullous disorder code is documented.
Coding tip
Code only from the provider’s documented diagnosis, and verify whether a more specific bullous disorder code is available first.