ICD-10-CM > A00-B99 > B50-B64 > B57 > B57.4 B57.4 Chagas' disease (chronic) with nervous system involvement Non-Billable/Non-Specific Codes B57.40Chagas' disease with nervous system involvement, unspecifiedB57.41Meningitis in Chagas' diseaseB57.42Meningoencephalitis in Chagas' diseaseB57.49Other nervous system involvement in Chagas' disease