B66.0 – Opisthorchiasis
ICD-10-CM 2027 diagnosis code · Helminthiases
ICD-10-CM code
B66.0
- Code
B66.0(claims format:B660)- Description
- Opisthorchiasis
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 1. Certain infectious and parasitic diseases (A00-B99)
- Block
- B65-B83 Helminthiases
- Parent codes
- B66
Notes for B66.0
Applicable to:
- Infection due to cat liver fluke
- Infection due to Opisthorchis (felineus)(viverrini)
Index terms for B66.0
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in B66
- B66.1 – ClonorchiasisBillable
- B66.2 – DicroceliasisBillable
- B66.3 – FascioliasisBillable
- B66.4 – ParagonimiasisBillable
- B66.5 – FasciolopsiasisBillable
- B66.8 – Other specified fluke infectionsBillable
- B66.9 – Fluke infection, unspecifiedBillable
Frequently asked questions
What is ICD-10 code B66.0?
B66.0 is the ICD-10-CM code for opisthorchiasis, in the block B65-B83 (Helminthiases).
Is B66.0 a billable code?
Yes. B66.0 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does B66.0 belong to?
It belongs to category B66 – Other fluke infections.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.