ICD-10-CM · Chapter 1 · A00-B99
B09 Unspecified viral infection characterized by skin and mucous membrane lesions
Includes
- Viral enanthema NOS
- Viral exanthema NOS
This category is a complete, billable diagnosis code.
No additional specificity is required — submit B09 directly on claims and documentation without a subcode extension.
Last reviewed: September 2026