| B1001 | Human herpesvirus 6 encephalitis |
| B1009 | Other human herpesvirus encephalitis |
| B108 | Other human herpesvirus infection |
| B1081 | Human herpesvirus 6 infection |
| B1082 | Human herpesvirus 7 infection |
| B1089 | Other human herpesvirus infection |
| B15 | Acute hepatitis A |
| B150 | Hepatitis A with hepatic coma |
| B159 | Hepatitis A without hepatic coma |
| B16 | Acute hepatitis B |
| B160 | Acute hepatitis B with delta-agent with hepatic coma |
| B161 | Acute hepatitis B with delta-agent without hepatic coma |
| B162 | Acute hepatitis B without delta-agent with hepatic coma |
| B169 | Acute hepatitis B without delta-agent and without hepatic coma |
| B17 | Other acute viral hepatitis |
| B170 | Acute delta-(super) infection of hepatitis B carrier |
| B171 | Acute hepatitis C |
| B1710 | Acute hepatitis C without hepatic coma |
| B1711 | Acute hepatitis C with hepatic coma |
| B172 | Acute hepatitis E |
| B178 | Other specified acute viral hepatitis |
| B179 | Acute viral hepatitis, unspecified |
| B18 | Chronic viral hepatitis |
| B180 | Chronic viral hepatitis B with delta-agent |
| B181 | Chronic viral hepatitis B without delta-agent |
| B182 | Chronic viral hepatitis C |
| B188 | Other chronic viral hepatitis |
| B189 | Chronic viral hepatitis, unspecified |
| B19 | Unspecified viral hepatitis |
| B190 | Unspecified viral hepatitis with hepatic coma |
| B191 | Unspecified viral hepatitis B |
| B1910 | Unspecified viral hepatitis B without hepatic coma |
| B1911 | Unspecified viral hepatitis B with hepatic coma |
| B192 | Unspecified viral hepatitis C |
| B1920 | Unspecified viral hepatitis C without hepatic coma |
| B1921 | Unspecified viral hepatitis C with hepatic coma |
| B199 | Unspecified viral hepatitis without hepatic coma |
| B20 | Human immunodeficiency virus [HIV] disease |
| B25 | Cytomegaloviral disease |
| B250 | Cytomegaloviral pneumonitis |
| B251 | Cytomegaloviral hepatitis |
| B252 | Cytomegaloviral pancreatitis |
| B258 | Other cytomegaloviral diseases |
| B259 | Cytomegaloviral disease, unspecified |
| B26 | Mumps |
| B260 | Mumps orchitis |
| B261 | Mumps meningitis |
| B262 | Mumps encephalitis |
| B263 | Mumps pancreatitis |
| B268 | Mumps with other complications |