B77.81 Ascariasis pneumonia

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

Applies from B77 Ascariasis

Includes

• ascaridiasis
• roundworm infection

MS-DRG index

Defines the logic of DRG(s) 391-392 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 127.0 Ascariasis (approximate)
• 484.8 Pneumonia in other infectious diseases classified elsewhere (approximate)

Code annotations containing back-references to B77.81

Back-references to B77.81

• Type 1 Excludes: J17 Pneumonia in diseases classified elsewhere ("pneumonia in ascariasis (B77.81)")

Back-references to B77

• 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 B77.81

• Ascariasis › with › pneumonia, pneumonitis
• Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) › Ascaris
• Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) › in (due to) › ascariasis

Nearby codes

• B77 Ascariasis
• B77.0 Ascariasis with intestinal complications
• B77.8 Ascariasis with other complications
• B77.81 Ascariasis pneumonia (this code)
• B77.89 Ascariasis with other complications
• B77.9 Ascariasis, unspecified