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A08.11

Billable

Acute gastroenteropathy due to Norwalk agent

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

This is a stomach and intestinal infection caused by the Norwalk virus, which causes sudden onset of nausea, vomiting, diarrhea, and abdominal discomfort. It typically resolves on its own within a few days but can cause significant dehydration.

Coding Tips

  • •Verify documentation specifically mentions Norwalk agent or norovirus to distinguish from other viral gastroenteritis causes (A08.19)
  • •Document any associated complications such as dehydration (E86) or electrolyte imbalances that may require additional coding

Code Hierarchy

└A08Viral and other specified intestinal infections└A08.1Acute gastroenteropathy due to Norwalk agent and other small round viruses└A08.11Acute gastroenteropathy due to Norwalk agent
└A08.11Acute gastroenteropathy due to Norwalk agent

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