B09 Unspecified viral infection characterized by skin and mucous membrane lesions

Billable

Block: Viral infections characterized by skin and mucous membrane lesions (B00-B09)

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