ICD-10 Code A00 – Cholera (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A00 – Cholera
What it is
A00 identifies cholera, an acute intestinal infection caused by toxigenic Vibrio cholerae. Use it when the record documents cholera, including suspected or confirmed infection, per the provider’s diagnosis.
Clinical signs
Typical findings include sudden watery diarrhea, vomiting, and rapid dehydration. Clinical features vary; refer to documentation, especially when the chart notes severe fluid loss or epidemiologic exposure.
When to use this code
Use A00 when the provider documents cholera as the cause of the patient’s gastrointestinal illness. It also fits encounters for evaluation or treatment of confirmed cholera, even if the note focuses on dehydration or diarrhea. Code the condition only when documentation supports it.
Do not use for
Do not use this code for nonspecific gastroenteritis, food poisoning, or diarrhea without a documented cholera diagnosis. Check documentation if the record names another infectious agent or leaves the cause unclear.
Coding tip
Verify that the provider explicitly links the illness to cholera before assigning A00.