ICD-10-CM Tabular Index · Chapter 1 · FY 2027 B00–B09
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 2027. The section is organized into the 10 code ranges listed below.
✓ Built from the official CMS FY 2027 datasetEffective Oct 1, 2026 – Sep 30, 2027
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
Lesions, or affected areas, on the skin or moist body linings characterize these viral infections.
The categories separate herpes simplex infections (B00), chickenpox (B01), and zoster (B02). They also identify smallpox (B03), monkeypox (B04), measles (B05), German measles (B06), and viral warts (B07). B08 groups other named viral infections with these lesions; B09 identifies an unspecified viral infection with them.
Subdivisions under herpes simplex, chickenpox, zoster, measles, and German measles distinguish affected sites or complications. Chickenpox, zoster, measles, and German measles also have subdivisions for infections without complications. Viral warts separate plantar warts from other or unspecified warts.
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 2027. 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.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
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.
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
morbilli
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
verruca simplex
verruca vulgaris
viral warts due to human papillomavirus
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
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.
