ICD-10-CM > A00-B99 > A30-A49 > A39 > A39.8 A39.8 Other meningococcal infections Non-Billable/Non-Specific Codes A39.81Meningococcal encephalitisA39.82Meningococcal retrobulbar neuritisA39.83Meningococcal arthritisA39.84Postmeningococcal arthritisA39.89Other meningococcal infections