| B2681 | Mumps hepatitis |
| B2682 | Mumps myocarditis |
| B2683 | Mumps nephritis |
| B2684 | Mumps polyneuropathy |
| B2685 | Mumps arthritis |
| B2689 | Other mumps complications |
| B269 | Mumps without complication |
| B27 | Infectious mononucleosis |
| B270 | Gammaherpesviral mononucleosis |
| B2700 | Gammaherpesviral mononucleosis without complication |
| B2701 | Gammaherpesviral mononucleosis with polyneuropathy |
| B2702 | Gammaherpesviral mononucleosis with meningitis |
| B2709 | Gammaherpesviral mononucleosis with other complications |
| B271 | Cytomegaloviral mononucleosis |
| B2710 | Cytomegaloviral mononucleosis without complications |
| B2711 | Cytomegaloviral mononucleosis with polyneuropathy |
| B2712 | Cytomegaloviral mononucleosis with meningitis |
| B2719 | Cytomegaloviral mononucleosis with other complication |
| B278 | Other infectious mononucleosis |
| B2780 | Other infectious mononucleosis without complication |
| B2781 | Other infectious mononucleosis with polyneuropathy |
| B2782 | Other infectious mononucleosis with meningitis |
| B2789 | Other infectious mononucleosis with other complication |
| B279 | Infectious mononucleosis, unspecified |
| B2790 | Infectious mononucleosis, unspecified without complication |
| B2791 | Infectious mononucleosis, unspecified with polyneuropathy |
| B2792 | Infectious mononucleosis, unspecified with meningitis |
| B2799 | Infectious mononucleosis, unspecified with other complication |
| B30 | Viral conjunctivitis |
| B300 | Keratoconjunctivitis due to adenovirus |
| B301 | Conjunctivitis due to adenovirus |
| B302 | Viral pharyngoconjunctivitis |
| B303 | Acute epidemic hemorrhagic conjunctivitis (enteroviral) |
| B308 | Other viral conjunctivitis |
| B309 | Viral conjunctivitis, unspecified |
| B33 | Other viral diseases, not elsewhere classified |
| B330 | Epidemic myalgia |
| B331 | Ross River disease |
| B332 | Viral carditis |
| B3320 | Viral carditis, unspecified |
| B3321 | Viral endocarditis |
| B3322 | Viral myocarditis |
| B3323 | Viral pericarditis |
| B3324 | Viral cardiomyopathy |
| B333 | Retrovirus infections, not elsewhere classified |
| B334 | Hantavirus (cardio)-pulmonary syndrome [HPS] [HCPS] |
| B338 | Other specified viral diseases |
| B34 | Viral infection of unspecified site |
| B340 | Adenovirus infection, unspecified |
| B341 | Enterovirus infection, unspecified |