Anisakiasis

This code represents anisakiasis, a parasitic infection of the gastrointestinal tract caused by the ingestion of raw or undercooked seafood containing Anisakis larvae. The larvae typically embed in the stomach or intestinal wall, leading to acute abdominal symptoms.

Use this code when documentation confirms a diagnosis of anisakiasis, often following a history of consuming raw fish or squid. Supporting documentation would include endoscopic findings of embedded larvae, histopathological confirmation, or serological evidence.

• Ensure documentation specifies anisakiasis to differentiate from other parasitic GI infections.
• Consider sequencing this code as the primary diagnosis when it is the reason for the encounter.
• Look for documentation of the specific anatomical site of infection (e.g., gastric, intestinal) for potential additional specificity, though ICD-9-CM does not offer further breakdown for this condition.