A09

What This Code Means

This code describes inflammation of the stomach and intestines caused by an infection, when the specific cause (like bacteria or virus) is not identified or documented. It's commonly known as infectious diarrhea or food poisoning.

Coding Tips

• •Use this code only when the infectious agent is truly unknown or unspecified; if the causative organism is identified (e.g., Salmonella, Norovirus), use the more specific code instead
• •This code includes both gastroenteritis and colitis presentations; document the clinical presentation and any identified symptoms to support medical necessity