Z11
ICD-10Non-billable categoryEncounter for screening for infec/parastc diseases
Official ICD-10-CM descriptor (FY2026)
Encounter for screening for infectious and parasitic diseases
Z11 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Inclusion terms
- 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.
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- encounter for diagnostic examination-code to sign or symptom
More specific codes under Z11
- Z11.0Encounter for screening for intestinal infectious diseases
- Z11.1Encounter for screening for respiratory tuberculosis
- Z11.2Encounter for screening for other bacterial diseases
- Z11.3Encntr screen for infections w sexl mode of transmiss
- Z11.4Encounter for screening for human immunodeficiency virus
- Z11.5Encounter for screening for other viral diseasescategory
- Z11.6Encntr screen for oth protozoal diseases and helminthiases
- Z11.7Encounter for testing for latent tuberculosis infection
- Z11.8Encounter for screening for oth infec/parastc diseases
- Z11.9Encounter for screening for infec/parastc diseases, unsp
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.