| Z11 | Encounter for screening for infectious and parasitic diseases | NON-BILLABLE CODE |
| Z11.0 | Encounter for screening for intestinal infectious diseases | BILLABLE CODE |
| Z11.2 | Encounter for screening for other bacterial diseases | BILLABLE CODE |
| Z11.3 | Encounter for screening for infections with a predominantly sexual mode of transmission | BILLABLE CODE |
| Z11.4 | Encounter for screening for human immunodeficiency virus [HIV] | BILLABLE CODE |
| Z11.5 | Encounter for screening for other viral diseases | NON-BILLABLE CODE |
| Z11.51 | Encounter for screening for human papillomavirus (HPV) | BILLABLE CODE |
| Z11.52 | Encounter for screening for COVID-19 | BILLABLE CODE |
| Z11.59 | Encounter for screening for other viral diseases | BILLABLE CODE |
| Z11.6 | Encounter for screening for other protozoal diseases and helminthiases | BILLABLE CODE |
| Z11.7 | Encounter for testing for latent tuberculosis infection | BILLABLE CODE |
| Z11.8 | Encounter for screening for other infectious and parasitic diseases | BILLABLE CODE |
| Z11.9 | Encounter for screening for infectious and parasitic diseases, unspecified | BILLABLE CODE |
