A08 — Viral and other specified intestinal infections
Is A08 billable?
No — A08 is a non-billable header code. A08 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 9 billable codes beneath A08.
Billable codes under this header
- A08.0Rotaviral enteritis
- A08.2Adenoviral enteritis
- A08.4Viral intestinal infection, unspecified
- A08.8Other specified intestinal infections
- A08.11Acute gastroenteropathy due to Norwalk agent
- A08.19Acute gastroenteropathy due to other small round viruses
- A08.31Calicivirus enteritis
- A08.32Astrovirus enteritis
- A08.39Other viral enteritis
A08 at a glance
| Code | A08 |
|---|---|
| Description | Viral and other specified intestinal infections |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with A08 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Use additional code — inherited from Chapter 1
Report an additional code alongside A08 to fully describe the condition. A08 is sequenced first.
- code to identify resistance to antimicrobial drugs (Z16.-)
Excludes2 — not included here — inherited from Chapter 1
The conditions below are not part of A08, but a patient may have both at the same time. When documentation supports it, A08 and the excluded code may both be reported.
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
What codes fall under A08? (6)
How long has A08 existed?
A08 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with A08?
ICD-10-CM declares these codes mutually exclusive with A08 — exactly one of each pair can be correct for a given encounter.