ICD-10 Code B79 – Trichuriasis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B79 – Trichuriasis
What it is
Trichuriasis is an intestinal infection caused by whipworms. Use this code when documentation identifies Trichuris infection or whipworm disease.
Clinical signs
Clinical features vary; refer to documentation. Patients may have abdominal pain, diarrhea, or rectal symptoms, and heavy infection can cause anemia or growth problems.
When to use this code
Use B79 when the record clearly states trichuriasis, whipworm infection, or Trichuris infection. It applies to confirmed or documented diagnoses, not just exposure or suspicion. If the note only says parasitic infection without naming the organism, check documentation.
Do not use for
Do not use this code for nonspecific gastrointestinal complaints or for other helminth infections. If the organism is not documented or another parasite is named, choose the more specific code or check documentation.
Coding tip
Capture the organism name exactly as documented; “whipworm” and “Trichuris” support B79.