Ancylostomiasis due to ancylostoma duodenale

This code identifies an infection of the small intestine caused specifically by the hookworm species Ancylostoma duodenale. This parasitic infection, also known as Old World hookworm, can lead to iron deficiency anemia, abdominal pain, and malnutrition due to blood loss and nutrient malabsorption.

Assign this code when documentation confirms a diagnosis of ancylostomiasis and specifies Ancylostoma duodenale as the causative agent. This typically follows laboratory confirmation through stool examination identifying Ancylostoma duodenale eggs or adult worms.

• Differentiate from hookworm infections caused by Necator americanus (New World hookworm), which has a separate code.
• Ensure the physician's documentation explicitly states Ancylostoma duodenale to support this specific code.
• Consider coding associated conditions such as iron deficiency anemia (e.g., 280.9) as secondary diagnoses.