B66.3 Fascioliasis

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Infection due to Fasciola gigantica
• Infection due to Fasciola hepatica
• Infection due to Fasciola indica
• Sheep liver fluke disease

MS-DRG index

Defines the logic of DRG(s) 441-443 in MDC 07.

Approximate ICD-9-CM (GEMs)

• 121.3 Fascioliasis

Code annotations containing back-references to B66.3

Back-references to B66

• Code First: H94.0 Acoustic neuritis in infectious and parasitic diseases classified elsewhere ("parasitic disease (B65-B89)")
• Type 2 Excludes: J82 Pulmonary eosinophilia, not elsewhere classified ("pulmonary eosinophilia due to specified parasitic infection (B50-B83)")

Diagnosis Index entries for B66.3

• Cirrhosis, cirrhotic (hepatic) (liver) › biliary (cholangiolitic) (cholangitic) (hypertrophic) (obstructive) (pericholangiolitic) › due to › flukes
• Disease, diseased › liver (chronic) (organic) › fluke › sheep
• Distoma hepaticum infestation
• Distomiasis › bile passages
• Distomiasis › hepatic
• Distomiasis › liver
• Fascioliasis
• Flukes NEC › liver
• Infection, infected, infective (opportunistic) › Fasciola (gigantica) (hepatica) (indica)
• Infection, infected, infective (opportunistic) › sheep liver fluke
• Infestation › Distoma hepaticum
• Infestation › Fasciola (gigantica) (hepatica) (indica)
• Infestation › fluke › liver (sheep)
• Infestation › fluke › sheep liver

Nearby codes

• B66 Other fluke infections
• B66.0 Opisthorchiasis
• B66.1 Clonorchiasis
• B66.2 Dicroceliasis
• B66.3 Fascioliasis (this code)
• B66.4 Paragonimiasis
• B66.5 Fasciolopsiasis
• B66.8 Other specified fluke infections
• B66.9 Fluke infection, unspecified