B66.4 Paragonimiasis

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

Applicable to

• Infection due to Paragonimus species
• Lung fluke disease
• Pulmonary distomiasis

Risk adjustment (HCC)

• CMS-HCC V22: HCC 115 — Pneumococcal Pneumonia, Empyema, Lung Abscess
• ESRD V24: HCC 115

MS-DRG index

Defines the logic of DRG(s) 177-179 in MDC 04.

Approximate ICD-9-CM (GEMs)

• 121.2 Paragonimiasis

Code annotations containing back-references to B66.4

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 B66.4

• Disease, diseased › lung › fluke
• Disease, diseased › lung › fluke › oriental
• Disease, diseased › Oriental lung fluke
• Distomiasis › lung
• Distomiasis › pulmonary
• Infection, infected, infective (opportunistic) › Paragonimus (westermani)
• Infestation › fluke › lung (oriental)
• Infestation › Paragonimus (westermani)
• Paragonimiasis

Nearby codes

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