1F66.3 Lymphatic filariasis

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

Infestation by filarial nematodes of the genera Wuchereria and Brugia. It is acquired via transcutaneous injection of larvae by mosquitoes previously infested with microfilariae from the blood of a human host. The adult worms live in the lymphatics but release microfilariae into the bloodstream to complete the life cycle of the parasite. Clinical disease occurs in only a minority of those infected. In the acute stage this may present as an acute painful adenolymphangitis with fever. Chronic infestation causes progressive obstruction of lymphatic vessels and can result in disfiguring lymphoedema (elephantiasis), particularly of the genitalia and lower extremities.

exclusions

• Lymphoedema due to lymphatic filariasis  (BD93.13)

sections/codes in this section (1F66.3-1F66.3)

• Filariasis due to Wuchereria bancrofti  (1F66.30)
• Filariasis due to Brugia malayi  (1F66.31)
• Filariasis due to Brugia timori  (1F66.32)
• Lymphatic filariasis, unspecified  (1F66.3Z)

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