Viral and other specified intestinal infections (A08) ICD-10-CM
The A08 code range covers viral and other specified intestinal infections with 12 ICD-10-CM diagnosis codes. 9 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 A08 Range 12 codes · 9 billable
- A08 Viral and other specified intestinal infectionsNon-billable
- A08.0 Rotaviral enteritis
- A08.1 Acute gastroenteropathy due to Norwalk agent and other small round virusesNon-billable
- A08.11 Acute gastroenteropathy due to Norwalk agent
- A08.19 Acute gastroenteropathy due to other small round viruses
- A08.2 Adenoviral enteritis
- A08.3 Other viral enteritisNon-billable
- A08.31 Calicivirus enteritis
- A08.32 Astrovirus enteritis
- A08.39 Other viral enteritis
- A08.4 Viral intestinal infection, unspecified
- A08.8 Other specified intestinal infections
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the A08 range.
Rotaviral Enteritis
Enteritis attributed to the rotavirus.
About the A08 Code Range
These intestinal infections include infections named for a virus and other specified intestinal infections.
The subdivisions separate rotaviral infection under A08.0, adenoviral infection under A08.2, and infection due to the Norwalk agent or other small round viruses under A08.1. That last group splits into Norwalk agent and other small round viruses. A08.3 separates calicivirus, astrovirus, and other viral enteritis. A08.4 identifies an unspecified viral intestinal infection, while A08.8 identifies other specified intestinal infections.
Questions About This Page
How many billable codes are in the A08 range?
Of the 12 codes in this range, 9 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 A08 range classify?
The range classifies viral and other specified intestinal infections. 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.
