ICD-10 Code B78.9 – Strongyloidiasis, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B78.9 – Strongyloidiasis, unspecified
What it is
B78.9 identifies strongyloidiasis when the record confirms infection with Strongyloides but does not specify the species or another detail. Use it for an unspecified parasitic infection documented by the provider.
Clinical signs
Clinical features vary; refer to documentation. Patients may have nonspecific gastrointestinal or skin findings, and some infections are asymptomatic until later recognition.
When to use this code
Use B78.9 when the provider documents strongyloidiasis without further detail, or when the note does not identify a more specific form. It is appropriate for confirmed infection when the chart lacks enough information for a more specific code. Check documentation if the record mentions additional complications or related conditions.
Do not use for
Do not use this code for a different helminth infection or for a suspected diagnosis that is not confirmed. If the documentation names a more specific strongyloidiasis code, use that code instead.
Coding tip
If the organism or clinical form is not clearly stated, code the unspecified option and query the provider when specificity would change coding.