ICD-10 Code B66.2 – Dicroceliasis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B66.2 – Dicroceliasis
What it is
Dicroceliasis is an infection caused by the lancet liver fluke, a parasitic trematode that affects the biliary system. Use this code when documentation identifies Dicrocoelium infection or dicroceliasis.
Clinical signs
Clinical features vary; refer to documentation. Reported findings may include biliary or gastrointestinal symptoms, but confirmation depends on parasite identification or a documented clinical diagnosis.
When to use this code
Use B66.2 when the provider documents dicroceliasis, Dicrocoelium infection, or infection by the lancet liver fluke. Apply it for confirmed cases and for encounters focused on this parasitic diagnosis. If the record only mentions suspected exposure, check documentation before coding.
Do not use for
Do not use this code for unspecified helminth infections or other liver fluke diseases unless dicroceliasis is clearly documented. Do not assign it for exposure alone or for symptoms without a stated diagnosis.
Coding tip
Verify the exact parasite name in the chart; B66.2 is specific to dicroceliasis.