ICD-10 Code B65.9 – Schistosomiasis, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B65.9 – Schistosomiasis, unspecified
What it is
B65.9 identifies schistosomiasis when the species or body site is not specified. It is used for a parasitic infection caused by Schistosoma species, but the record does not document a more exact form.
Clinical signs
Clinical features vary; refer to documentation. Patients may have signs of parasitic infection, but the chart should support schistosomiasis without identifying a specific organ involvement or species.
When to use this code
Use B65.9 when the provider documents schistosomiasis and does not specify intestinal, urinary, or other site involvement. It also fits when the species is unknown or the available record is too nonspecific for a more detailed code.
Choose the unspecified code only after reviewing the note, lab reports, and problem list. If the documentation later identifies a specific form, code that diagnosis instead.
Do not use for
Do not use B65.9 if the record clearly identifies a specific schistosomiasis type or organ involvement. Check documentation before assigning it for other parasitic infections or for suspected disease without confirmation.
Coding tip
Code B65.9 only when the provider’s documentation supports schistosomiasis but lacks enough detail for a more specific code.