Viral infection of unspecified site (B34) ICD-10-CM
The B34 code range covers viral infection of unspecified site with 8 ICD-10-CM diagnosis codes. 7 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
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.
Codes in the B34 Range 8 codes · 7 billable
- B34 Viral infection of unspecified siteNon-billable
- B34.0 Adenovirus infection, unspecified
- B34.1 Enterovirus infection, unspecified
- B34.2 Coronavirus infection, unspecified
- B34.3 Parvovirus infection, unspecified
- B34.4 Papovavirus infection, unspecified
- B34.8 Other viral infections of unspecified site
- B34.9 Viral infection, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the B34 range.
Adenoviridae Infections
Virus diseases caused by the ADENOVIRIDAE.
Coronavirus Infections
Virus diseases caused by the CORONAVIRUS genus. Some specifics include transmissible enteritis of turkeys (ENTERITIS, TRANSMISSIBLE, OF TURKEYS); FELINE INFECTIOUS PERITONITIS; and transmissible gastroenteritis of swine (GASTROENTERITIS, TRANSMISSIBLE, OF SWINE).
Enterovirus Infections
Diseases caused by ENTEROVIRUS.
Papovavirus Infection
An infection caused by any papovavirus.
Virus Diseases
A general term for diseases caused by viruses.
About the B34 Code Range
These are viral infections for which the site is unspecified. The subdivisions separate infections named for a virus from other or unspecified viral infections.
B34.0 through B34.4 distinguish adenovirus, enterovirus, coronavirus, parvovirus, and papovavirus infections. B34.8 identifies other viral infections of unspecified site. B34.9 identifies an unspecified viral infection.
Questions About This Page
How many billable codes are in the B34 range?
Of the 8 codes in this range, 7 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the B34 range classify?
The range classifies viral infection of unspecified site. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
