ICD-10 Code B08.8 – Other specified viral infections characterized by skin and mucous membrane lesions (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B08.8 – Other specified viral infections characterized by skin and mucous membrane lesions
What it is
B08.8 identifies a viral infection that causes skin or mucous membrane lesions but does not fit a more specific ICD-10 category. Use it when documentation names an “other specified” viral exanthem or lesion pattern.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include rash, vesicles, ulcers, or other mucocutaneous lesions linked to a viral illness, without a more specific diagnosis recorded.
When to use this code
Use B08.8 when the provider documents a viral infection with skin or mucous membrane involvement and does not identify a more specific organism or syndrome. It is also appropriate when the chart clearly states an “other specified” viral condition. Check documentation if the note suggests a better-coded viral exanthem or a different primary diagnosis.
Do not use for
Do not use this code when the record supports a more specific viral diagnosis, such as a named exanthem or herpes infection. Do not assign it for nonviral rashes or lesions.
Coding tip
Code B08.8 only when the provider’s wording supports an unspecified-but-specified viral mucocutaneous illness and no more precise code is documented.