B57.42 Meningoencephalitis in Chagas' disease

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

Applies from B57 Chagas' disease

Includes

• American trypanosomiasis
• infection due to Trypanosoma cruzi

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 086.1 Chagas' disease with other organ involvement (approximate)

Code annotations containing back-references to B57.42

Back-references to B57

• Code First: F02 Dementia in other diseases classified elsewhere ("trypanosomiasis (B56.-, B57.-)")
• Type 2 Excludes: J82 Pulmonary eosinophilia, not elsewhere classified ("pulmonary eosinophilia due to specified parasitic infection (B50-B83)")

Diagnosis Index entries for B57.42

• Chagas' (-Mazza) disease (chronic) › with › nervous system involvement › meningoencephalitis
• Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › in (due to) › Chagas' disease (chronic)

Nearby codes

• B57.32 Megacolon in Chagas' disease
• B57.39 Other digestive system involvement in Chagas' disease
• B57.4 Chagas' disease (chronic) with nervous system involvement
• B57.40 Chagas' disease with nervous system involvement, unspecified
• B57.41 Meningitis in Chagas' disease
• B57.42 Meningoencephalitis in Chagas' disease (this code)
• B57.49 Other nervous system involvement in Chagas' disease
• B57.5 Chagas' disease (chronic) with other organ involvement