ICD-10-CM > A00-B99 > B25-B34 > B27 > B27.0 B27.0 Gammaherpesviral mononucleosis Non-Billable/Non-Specific Applicable To Mononucleosis due to Epstein-Barr virus Codes B27.00Gammaherpesviral mononucleosis without complicationB27.01Gammaherpesviral mononucleosis with polyneuropathyB27.02Gammaherpesviral mononucleosis with meningitisB27.09Gammaherpesviral mononucleosis with other complications