B66.0Billable

Opisthorchiasis

Chapter
1. Certain infectious and parasitic diseases
Category
B66
Effective date
October 1, 2026

Related codes in category B66

B66Other fluke infectionsB66.1ClonorchiasisYesB66.2DicroceliasisYesB66.3FascioliasisYesB66.4ParagonimiasisYesB66.5FasciolopsiasisYesB66.8Other specified fluke infectionsYesB66.9Fluke infection, unspecifiedYes

Frequently asked questions

What is ICD-10 code B66.0?

B66.0 is an ICD-10-CM diagnosis code for Opisthorchiasis.

Is B66.0 a billable code?

Yes. B66.0 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is B66.0 in?

B66.0 falls under Chapter 1: Certain infectious and parasitic diseases.

When did B66.0 become effective?

B66.0 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to B66.0?

B66.0 belongs to category B66, which includes 8 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.