ICD-10 Code B74.0 – Filariasis due to Wuchereria bancrofti (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B74.0 – Filariasis due to Wuchereria bancrofti
What it is
B74.0 identifies lymphatic filariasis caused by Wuchereria bancrofti, a parasitic infection that affects the lymphatic system. Use it when the record specifically names this organism.
Clinical signs
Typical findings include recurrent lymphatic inflammation, limb swelling, and chronic lymphedema or elephantiasis in advanced disease. Clinical features vary; refer to documentation.
When to use this code
Use B74.0 when the provider documents filariasis due to Wuchereria bancrofti or bancroftian filariasis. It also applies when the organism is confirmed in the assessment, problem list, or discharge diagnosis. If only “filariasis” is stated without a species, check documentation.
Do not use for
Do not use this code for other filarial infections, such as those caused by different parasites. Do not assign it when the chart only suggests parasitic disease without confirming Wuchereria bancrofti.
Coding tip
Code the documented organism exactly; if the species is missing, query for clarification before selecting B74.0.