1. B27 Infectious mononucleosis


    • glandular fever
    • monocytic angina
    • Pfeiffer's disease
    1. B27.0 Gammaherpesviral mononucleosis

      Inclusion term(s):

      • Mononucleosis due to Epstein-Barr virus
      1. B27.00 Gammaherpesviral mononucleosis without complication

      2. B27.01 Gammaherpesviral mononucleosis with polyneuropathy

      3. B27.02 Gammaherpesviral mononucleosis with meningitis

      4. B27.09 Gammaherpesviral mononucleosis with other complications

        Inclusion term(s):

        • Hepatomegaly in gammaherpesviral mononucleosis
    2. B27.1 Cytomegaloviral mononucleosis

      1. B27.10 Cytomegaloviral mononucleosis without complications

      2. B27.11 Cytomegaloviral mononucleosis with polyneuropathy

      3. B27.12 Cytomegaloviral mononucleosis with meningitis

      4. B27.19 Cytomegaloviral mononucleosis with other complication

        Inclusion term(s):

        • Hepatomegaly in cytomegaloviral mononucleosis
    3. B27.8 Other infectious mononucleosis

      1. B27.80 Other infectious mononucleosis without complication

      2. B27.81 Other infectious mononucleosis with polyneuropathy

      3. B27.82 Other infectious mononucleosis with meningitis

      4. B27.89 Other infectious mononucleosis with other complication

        Inclusion term(s):

        • Hepatomegaly in other infectious mononucleosis
    4. B27.9 Infectious mononucleosis, unspecified

      1. B27.90 Infectious mononucleosis, unspecified without complication

      2. B27.91 Infectious mononucleosis, unspecified with polyneuropathy

      3. B27.92 Infectious mononucleosis, unspecified with meningitis

      4. B27.99 Infectious mononucleosis, unspecified with other complication

        Inclusion term(s):

        • Hepatomegaly in unspecified infectious mononucleosis
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.