Z11
Encounter for screening for infectious and parasitic diseases
Choose the additional character
Z11 needs more characters to be billable. Pick the specific code below.
- Z11.0Encounter for screening for intestinal infectious diseasesBillable
- Z11.1Encounter for screening for respiratory tuberculosisBillable
- Z11.2Encounter for screening for other bacterial diseasesBillable
- Z11.3Encounter for screening for infections with a predominantly sexual mode of transmissionBillable
- Z11.4Encounter for screening for human immunodeficiency virus [HIV]Billable
- Z11.5Encounter for screening for other viral diseasesMore levels
- Z11.6Encounter for screening for other protozoal diseases and helminthiasesBillable
- Z11.7Encounter for testing for latent tuberculosis infectionBillable
- Z11.8Encounter for screening for other infectious and parasitic diseasesBillable
- Z11.9Encounter for screening for infectious and parasitic diseases, unspecifiedBillable
This code does not map to a risk-adjusting HCC in the loaded models.
Coding notes
Excludes 1 never coded together · Excludes 2 may co-exist
encounter for diagnostic examination-code to sign or symptom
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.
Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways: (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury. (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.
Official Guidelines for Z11
FY 2026 ›Sections that reference Z11
- I.C.21.c.5)Screening
… The screening Z codes/categories: Z11 Encounter for screening for infectious and parasitic diseases Z12 Encounter for screening for malignant neoplasms Z13 Encounter …
- I.C.1.a.2)(i)Encounters for HIV testingChapter 1
If a patient without signs or symptoms is tested for HIV, assign code Z11.4, Encounter for screening for human immunodeficiency virus [HIV]. …
- I.C.1.g.1)(f)Screening for COVID-19Chapter 1
For screening for COVID-19, including preoperative testing, assign code Z11.52, Encounter for screening for COVID-19.
- I.B.3Code or codes from A00.0 through T88.9, Z00-Z99.8, U00-U85Conventions & general rules
The appropriate code or codes from A00.0 through T88.9, Z00-Z99.8, and U00-U85 must be used to identify diagnoses, symptoms, conditions, problems, complaints or other reason(s) for the …
- I.C.20.a.1)Used with any code in the range of A00.0-T88.9, Z00-Z99Chapter 20
An external cause code may be used with any code in the range of A00.0-T88.9, Z00-Z99, classification that represents a health condition due to an external cause. …
- IV.BCodes from A00.0 through T88.9, Z00-Z99, U00-U85Outpatient services
The appropriate code(s) from A00.0 through T88.9, Z00-Z99 and U00-U85 must be used to identify diagnoses, symptoms, conditions, problems, complaints, or other reason(s) for the …
Showing 6 of 7. Search the guidelines for Z11. Sections whose FY 2026 text names Z11, its Z11 category, or a range containing it — the chapter guidance above is the authoritative source.