ICD-10-CM > A00-B99 > B25-B34 > B27 > B27.8 B27.8 Other infectious mononucleosis Non-Billable/Non-Specific Codes B27.80Other infectious mononucleosis without complicationB27.81Other infectious mononucleosis with polyneuropathyB27.82Other infectious mononucleosis with meningitisB27.89Other infectious mononucleosis with other complication