ICD-10-CM category
A09: Infectious gastroenteritis and colitis, unspecified
A09 is “Infectious gastroenteritis and colitis, unspecified”. It has no subcodes in this category.
Frequently asked questions
What is ICD-10-CM code A09?
A09 is the ICD-10-CM code for Infectious gastroenteritis and colitis, unspecified.
Is A09 billable?
Yes — A09 is a valid, billable ICD-10-CM code (it has no further subdivisions).
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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