ICD-10 Code B76.1 – Necatoriasis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B76.1 – Necatoriasis
What it is
Necatoriasis is an intestinal hookworm infection caused by Necator americanus. It usually affects the small intestine and may lead to blood loss if the infestation is significant.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include abdominal discomfort, diarrhea, and anemia, especially with heavier parasite burdens.
When to use this code
Use this code when the record specifically documents necatoriasis or infection with Necator americanus. It is appropriate for confirmed or clinician-documented hookworm disease when the organism is identified or clearly stated.
If the note only says “hookworm infection” without species detail, check documentation before assigning this code. Code the condition documented by the provider, not the suspected exposure alone.
Do not use for
Do not use this code for other helminth infections or for nonspecific intestinal symptoms without a documented diagnosis. Check documentation if the record does not identify necatoriasis.
Coding tip
Look for explicit mention of Necator americanus or necatoriasis in the assessment, problem list, or discharge diagnosis before coding B76.1.