ICD-10 Code B56.0 – Gambiense trypanosomiasis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B56.0 – Gambiense trypanosomiasis
What it is
B56.0 identifies Gambiense trypanosomiasis, also called West African sleeping sickness. Use it for infection caused by Trypanosoma brucei gambiense when the diagnosis is documented.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include fever, headache, lymphadenopathy, and later neurologic or sleep-related changes in confirmed cases.
When to use this code
Use B56.0 when the provider documents Gambiense trypanosomiasis, suspected or confirmed by clinical evaluation and relevant testing. Code it for the specific parasitic infection, not for nonspecific travel history or screening alone. If the species is not stated, check documentation before assigning a code.
Do not use for
Do not use this code for non-gambiense trypanosomiasis or other infectious causes of fever and neurologic symptoms. If the record only says “trypanosomiasis” without species detail, check documentation.
Coding tip
Verify the organism and region in the record, because B56.0 is specific to Gambiense infection.