Viral conjunctivitis (B30) ICD-10-CM
The B30 code range covers viral conjunctivitis with 7 ICD-10-CM diagnosis codes. 6 of them are billable and valid for claim submission in fiscal year 2026, 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 B30 Range 7 codes · 6 billable
About the B30 Code Range
ICD-10 code B30 and its subcodes are specifically used to classify different types of viral conjunctivitis, an eye infection caused by various viruses. These codes help distinguish the exact viral cause and clinical form of conjunctivitis, facilitating precise diagnosis and treatment tracking.
The base code B30 covers general viral conjunctivitis, while subcodes provide more detail. For example, B30.0 covers keratoconjunctivitis caused by adenovirus, also known as epidemic keratoconjunctivitis or adenoviral keratitis, which affects the cornea and conjunctiva. B30.1 captures conjunctivitis caused by adenovirus without corneal involvement, often called acute adenoviral follicular conjunctivitis. B30.2 is for viral pharyngoconjunctivitis, linking viral eye infection with throat symptoms. B30.3 represents acute epidemic hemorrhagic conjunctivitis, typically caused by enterovirus, characterized by conjunctival hemorrhages. B30.8 includes other viral conjunctivitis, such as that due to COVID-19 infection. Finally, B30.9 is reserved for unspecified viral conjunctivitis cases. This clear classification helps medical professionals and coders accurately identify the specific viral conjunctivitis type when assigning the ICD-10 code for viral conjunctivitis.
Questions About This Page
How many billable codes are in the B30 range?
Of the 7 codes in this range, 6 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 B30 range classify?
The range classifies viral conjunctivitis. 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.
