Unspecified viral infection characterized by skin and mucous membrane lesions (B09)

The ICD-10 code B09 is used for diagnosing unspecified viral infections that cause lesions on the skin and mucous membranes. This code captures cases where the exact virus is not identified but symptoms clearly involve visible skin or mouth-related viral impacts.

B09viral infection of the skin, oral mucosal viral disease, or viral exanthem. It is the appropriate code when clinicians observe viral skin rashes or mouth lesions but cannot pinpoint a specific virus. Additionally, this code can include issues like keratitis in exanthema, a condition involving inflammation of the cornea associated with a viral rash. Understanding that B09 stands for an unspecified viral skin and mucous membrane infection helps medical coders accurately bill and document cases without precise viral identification, ensuring these common but non-specific viral presentations are correctly recorded in health records.