Filariasis due to Wuchereria bancrofti

This code represents lymphatic filariasis specifically caused by the parasitic nematode Wuchereria bancrofti. This infection can lead to chronic lymphedema, hydrocele, and elephantiasis, primarily affecting the limbs, breasts, and genitalia. The disease is transmitted through mosquito bites.

Use this code when documentation explicitly states a diagnosis of filariasis confirmed to be due to Wuchereria bancrofti. This typically follows laboratory confirmation through microscopic examination of blood smears for microfilariae or antigen detection tests. It is appropriate for both acute and chronic manifestations of the infection.

• Differentiate from other filarial infections; ensure the specific causative agent Wuchereria bancrofti is documented.
• Code any associated manifestations, such as lymphedema (I89.0) or hydrocele (N43.3), as secondary diagnoses.
• Do not use for undifferentiated filariasis (B74.9) if the specific species is known.