B66 – Other fluke infections
ICD-10-CM 2027 diagnosis code · Helminthiases
ICD-10-CM code
B66
- Code
B66(claims format:B66)- Description
- Other fluke infections
- Billable
- No – use a more specific code below
- 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
Billable codes under B66
B66 is a header code and cannot be used on claims. Choose the most specific code:
- B66.0 – OpisthorchiasisBillable
- 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?
B66 is the ICD-10-CM code for other fluke infections, in the block B65-B83 (Helminthiases).
Is B66 a billable code?
No. B66 is a header code with more specific child codes; report one of the billable codes listed above.
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.