Giardiasis [lambliasis]

This code identifies an intestinal infection caused by the microscopic parasite Giardia lamblia. It typically presents with gastrointestinal symptoms such as diarrhea, abdominal cramps, bloating, and nausea, resulting from inflammation of the small intestine. The infection is often acquired through contaminated food or water.

Assign this code when documentation confirms a diagnosis of giardiasis, also known as lambliasis. This diagnosis is typically supported by laboratory identification of Giardia cysts or trophozoites in stool samples, or positive antigen detection tests. Use this code for both acute and chronic presentations of the infection.

• Differentiate from other parasitic intestinal infections; ensure Giardia is specifically documented.
• Do not use for asymptomatic carriers unless explicitly documented as an active infection.
• Consider sequencing with codes for associated symptoms (e.g., diarrhea, malnutrition) if they are significant and not integral to the giardiasis diagnosis itself.