ICD-10-CM · Chapter 21 · Z00-Z99
Z11 Encounter for screening for infectious and parasitic diseases
Includes
- Screening is the testing for disease or disease precursors in asymptomatic individuals so that early detection and treatment can be provided for those who test positive for the disease.
Excludes 1 (cannot be coded together)
- encounter for diagnostic examination-code to sign or symptom
Subcodes
Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.
| Code | Description | Billable |
|---|---|---|
| Z11..0 | Encounter for screening for intestinal infectious diseases | Yes |
| Z11..1 | Encounter for screening for respiratory tuberculosis | Yes |
| Z11..2 | Encounter for screening for other bacterial diseases | Yes |
| Z11..3 | Encounter for screening for infections with a predominantly sexual mode of transmission | Yes |
| Z11..4 | Encounter for screening for human immunodeficiency virus [HIV] | Yes |
| Z11..5 | Encounter for screening for other viral diseases | No |
| Z11..51 | Encounter for screening for human papillomavirus (HPV) | Yes |
| Z11..52 | Encounter for screening for COVID-19 | Yes |
| Z11..59 | Encounter for screening for other viral diseases | Yes |
| Z11..6 | Encounter for screening for other protozoal diseases and helminthiases | Yes |
| Z11..7 | Encounter for testing for latent tuberculosis infection | Yes |
| Z11..8 | Encounter for screening for other infectious and parasitic diseases | Yes |
| Z11..9 | Encounter for screening for infectious and parasitic diseases, unspecified | Yes |
Last reviewed: September 2026