B66.9 Fluke infection, unspecified

Billable ICD-10-CM code, FY2026.

MS-DRG index

Defines the logic of DRG(s) 867-869 in MDC 18.

Approximate ICD-9-CM (GEMs)

• 121.9 Trematode infection, unspecified

Code annotations containing back-references to B66.9

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 B66.9

• Distomiasis
• Infestation › fluke

Nearby codes

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