| Z20 | Contact with and (suspected) exposure to communicable diseases |
| | Contact with and (suspected) exposure to intestinal infectious diseases |
| | Contact with and (suspected) exposure to intestinal infectious diseases, due to Escherichia coli (E. coli) |
| | Contact with and (suspected) exposure to other intestinal infectious diseases |
| | Contact with and (suspected) exposure to tuberculosis |
| | Contact with and (suspected) exposure to infections with a predominantly sexual mode of transmission |
| | Contact with and (suspected) exposure to rabies |
| | Contact with and (suspected) exposure to rubella |
| | Contact with and (suspected) exposure to viral hepatitis |
| | Contact with and (suspected) exposure to human immunodeficiency virus [HIV] |
| | Contact with and (suspected) exposure to pediculosis, acariasis and other infestations |
| | Contact with and (suspected) exposure to other communicable diseases |
| | Contact with and (suspected) exposure to other bacterial communicable diseases |
| | Contact with and (suspected) exposure to anthrax |
| | Contact with and (suspected) exposure to meningococcus |
| | Contact with and (suspected) exposure to other bacterial communicable diseases |
| | Contact with and (suspected) exposure to other viral communicable diseases |
| | Contact with and (suspected) exposure to varicella |
| | Contact with and (suspected) exposure to Zika virus |
| | Contact with and (suspected) exposure to COVID-19 |
| | Contact with and (suspected) exposure to other viral communicable diseases |
| | Contact with and (suspected) exposure to other communicable diseases |
| | Contact with and (suspected) exposure to unspecified communicable disease |
