Unspecified viral infection characterized by skin and mucous membrane lesions (B09) ICD-10-CM
The B09 code range covers unspecified viral infection characterized by skin and mucous membrane lesions with 1 ICD-10-CM diagnosis codes. 1 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Viral enanthema NOS
- Viral exanthema NOS
Codes in the B09 Range 1 codes · 1 billable
- B09 Unspecified viral infection characterized by skin and mucous membrane lesions
About the B09 Code Range
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.
Questions About This Page
How many billable codes are in the B09 range?
Of the 1 codes in this range, 1 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the B09 range classify?
The range classifies unspecified viral infection characterized by skin and mucous membrane lesions. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
