| A08 | Viral and other specified intestinal infections | NON-BILLABLE CODE |
| A08.0 | Rotaviral enteritis | BILLABLE CODE |
| A08.1 | Acute gastroenteropathy due to Norwalk agent and other small round viruses | NON-BILLABLE CODE |
| A08.11 | Acute gastroenteropathy due to Norwalk agent | BILLABLE CODE |
| A08.19 | Acute gastroenteropathy due to other small round viruses | BILLABLE CODE |
| A08.2 | Adenoviral enteritis | BILLABLE CODE |
| A08.3 | Other viral enteritis | NON-BILLABLE CODE |
| A08.31 | Calicivirus enteritis | BILLABLE CODE |
| A08.32 | Astrovirus enteritis | BILLABLE CODE |
| A08.39 | Other viral enteritis | BILLABLE CODE |
| A08.4 | Viral intestinal infection, unspecified | BILLABLE CODE |
