ICD‑10 Code A0831 – Calicivirus enteritis Calicivirus enteritis
Clinical context, related codes, and quick guidance
Billable
Active (Valid as of April 2025) · ICD-10-CM (US)
Code Details
| Code | A0831 |
|---|---|
| Category | A083 – Other viral enteritis Other viral enteritis |
| Version | ICD-10-CM (US) |
| Status | Active (Valid as of April 2025) |
Plain‑English Summary
Calicivirus enteritis, identified by ICD-10-CM code A08.31, is a viral infection affecting the intestines, often causing gastroenteritis symptoms. This billable code is used for reimbursement and became effective October 1, 2025, for the 2026 edition.
When to Use This Code
- Signs/symptoms consistent with the code description
- No more specific diagnosis or etiology documented
- Used during initial or follow‑up encounters per payer rules
Related Codes
Browse category »| Code | Description |
|---|---|
| A0832 | Astrovirus enteritis Astrovirus enteritis |
| A0839 | Other viral enteritis Other viral enteritis |
| A084 | Viral intestinal infection, unspecified Viral intestinal infection, unspecified |
| A088 | Other specified intestinal infections Other specified intestinal infections |
| A09 | Infectious gastroenteritis and colitis, unspecified Infectious gastroenteritis and colitis, unspecified |
FAQ
ICD-10-CM A08.31 refers to Calicivirus enteritis, which is an inflammation of the intestines caused by a calicivirus. This viral infection typically leads to gastrointestinal symptoms such as nausea, vomiting, diarrhea, and abdominal pain.
Yes, A08.31 is a billable/specific ICD-10-CM code. Healthcare professionals can use this code to accurately identify a diagnosis for reimbursement purposes, provided the date of service aligns with its effective period (e.g., 2026 edition effective October 1, 2025).
While the provided text focuses on coding, Calicivirus enteritis (often associated with Norovirus, a type of calicivirus) typically presents with acute symptoms like nausea, vomiting, watery diarrhea, and abdominal cramps. Fever and headache may also occur.
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Calicivirus enteritis
ICD-10 A08.31
A08.31 diagnosis code
Viral enteritis
Calicivirus infection
Intestinal virus
Gastroenteritis code
ICD10 code for calicivirus enteritis
Symptoms of calicivirus
ICD-10 infectious diseases
Bowel infection viral