B27.9 - Infectious mononucleosis, unspecified B27 - Infectious mononucleosis B27.9 - Infectious mononucleosis, unspecified
B27.90 - Infectious mononucleosis, unspecified without complication B27.91 - Infectious mononucleosis, unspecified with polyneuropathy B27.92 - Infectious mononucleosis, unspecified with meningitis B27.99 - Infectious mononucleosis, unspecified with other complication