Viral infections characterized by skin and mucous membrane lesions (B00-B09) ICD-10-CM
The B00–B09 section covers viral infections characterized by skin and mucous membrane lesions with 103 ICD-10-CM diagnosis codes, of which 82 are billable in fiscal year 2026. The section is organized into the 10 code ranges listed below.
Code Ranges in This Section 10 ranges · 103 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the B00–B09 Code Range
ICD-10 codes B00-B09 cover viral infections that cause lesions on the skin and mucous membranes. These include well-known conditions like herpes simplex (B00), chickenpox or varicella (B01), herpes zoster or shingles (B02), smallpox (B03), and other viral infections marked by distinctive rashes or sores.
This range is used to specify various viral diseases characterized by skin and mucosal lesions with precision, aiding medical coders in choosing the correct code based on infection type and complications. For example, B00 includes herpes simplex infections such as eczema herpeticum and herpesviral keratitis, often known as oral herpes or cold sores. Codes like B01 classify varicella (chickenpox) and its neurological complications. B02 represents herpes zoster, including postherpetic neuralgia and ocular diseases linked to shingles. Other important entries are B05 for measles, B06 for rubella or German measles, and B07 for viral warts. Rare viral infections such as monkeypox (B04) and parapoxvirus infections (B08) are also included. These codes facilitate detailed documentation of viral infections that manifest prominently on the skin or mucous membranes, supporting accurate diagnosis and treatment.
Questions About This Page
How many codes are in the B00-B09 range?
The B00-B09 range contains 103 ICD-10-CM diagnosis codes in FY 2026. 82 of them are billable, and the rest are category headers that organize the section.
What conditions does B00-B09 cover?
The range covers viral infections characterized by skin and mucous membrane lesions. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
