ICD-10 Code B76.9 – Hookworm disease, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B76.9 – Hookworm disease, unspecified
What it is
B76.9 identifies hookworm infection when the species or specific type is not documented. Use it for an unspecified intestinal hookworm disease in the absence of more detail.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include abdominal discomfort, diarrhea, and signs of iron-deficiency anemia in more established infection.
When to use this code
Use B76.9 when the provider documents hookworm disease but does not name the organism or specify the infection further. It also fits when the record confirms hookworm infection and no additional detail is available. If the note identifies a specific hookworm species, code that documented condition instead.
Do not use for
Do not use this code for other helminth infections or for suspected hookworm without confirmation. Check documentation if the record only describes anemia, gastrointestinal symptoms, or parasite exposure.
Coding tip
Assign B76.9 only when “hookworm disease” is explicitly documented and no more specific code is supported by the record.