Z11: Encounter for screening for infectious and parasitic diseases
Codes under Z11 (Encounter for screening for infectious and parasitic diseases). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| Z11.0 | Encounter for screening for intestinal infectious diseases | ✓ |
| Z11.0 | Encounter for screening for intestinal infectious diseases | ✓ |
| Z11.1 | Encounter for screening for respiratory tuberculosis | ✓ |
| Z11.1 | Encounter for screening for respiratory tuberculosis | ✓ |
| Z11.2 | Encounter for screening for other bacterial diseases | ✓ |
| Z11.2 | Encounter for screening for other bacterial diseases | ✓ |
| Z11.3 | Encounter for screening for infections with a predominantly sexual mode of transmission | ✓ |
| Z11.3 | Encounter for screening for infections with a predominantly sexual mode of transmission | ✓ |
| Z11.4 | Encounter for screening for human immunodeficiency virus [HIV] | ✓ |
| Z11.4 | Encounter for screening for human immunodeficiency virus [HIV] | ✓ |
| Z11.5 | Encounter for screening for other viral diseases | — |
| Z11.5 | Encounter for screening for other viral diseases | — |
| Z11.6 | Encounter for screening for other protozoal diseases and helminthiases | ✓ |
| Z11.6 | Encounter for screening for other protozoal diseases and helminthiases | ✓ |
| Z11.7 | Encounter for testing for latent tuberculosis infection | ✓ |
| Z11.7 | Encounter for testing for latent tuberculosis infection | ✓ |
| Z11.8 | Encounter for screening for other infectious and parasitic diseases | ✓ |
| Z11.8 | Encounter for screening for other infectious and parasitic diseases | ✓ |
| Z11.9 | Encounter for screening for infectious and parasitic diseases, unspecified | ✓ |
| Z11.9 | Encounter for screening for infectious and parasitic diseases, unspecified | ✓ |
| Z11.51 | Encounter for screening for human papillomavirus (HPV) | ✓ |
| Z11.51 | Encounter for screening for human papillomavirus (HPV) | ✓ |
| Z11.52 | Encounter for screening for COVID-19 | ✓ |
| Z11.52 | Encounter for screening for COVID-19 | ✓ |
| Z11.59 | Encounter for screening for other viral diseases | ✓ |
| Z11.59 | Encounter for screening for other viral diseases | ✓ |
Frequently asked questions
What is ICD-10-CM code Z11?
Z11 is an ICD-10-CM category covering Encounter for screening for infectious and parasitic diseases. It contains 26 more specific diagnosis codes, 24 of which are billable.
Is Z11 a billable code?
No — Z11 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example Z11.0 — Encounter for screening for intestinal infectious diseases). 24 of the 26 codes under Z11 are billable.
What codes fall under Z11?
Z11 includes Z11.0, Z11.0, Z11.1, Z11.1, Z11.2, plus 21 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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