B66.3 – Fascioliasis
ICD-10-CM 2027 diagnosis code · Helminthiases
ICD-10-CM code
B66.3
- Code
B66.3(claims format:B663)- Description
- Fascioliasis
- 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 B66.3
Applicable to:
- Infection due to Fasciola gigantica
- Infection due to Fasciola hepatica
- Infection due to Fasciola indica
- Sheep liver fluke disease
Index terms for B66.3
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Fascioliasis
- Flukes NEC, liver
- Distomiasis, liver
- Distomiasis, hepatic
- Infestation, Fasciola
- Infestation, fluke, liver
- Distomiasis, bile passages
- Distoma hepaticum infestation
- Infestation, Distoma hepaticum
- Infestation, fluke, sheep liver
- Disease, diseased, liver, fluke, sheep
- Infection, infected, infective, Fasciola
- Cirrhosis, cirrhotic, biliary, due to, flukes
- Infection, infected, infective, sheep liver fluke
Related codes in B66
- B66.0 – OpisthorchiasisBillable
- B66.1 – ClonorchiasisBillable
- B66.2 – DicroceliasisBillable
- 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 B66.3?
B66.3 is the ICD-10-CM code for fascioliasis, in the block B65-B83 (Helminthiases).
Is B66.3 a billable code?
Yes. B66.3 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does B66.3 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.