Encounter for screening for infectious and parasitic diseases (Z11) ICD-10-CM
The Z11 code range covers encounter for screening for infectious and parasitic diseases with 14 ICD-10-CM diagnosis codes. 12 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- 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.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- encounter for diagnostic examination-code to sign or symptom
Codes in the Z11 Range 14 codes · 12 billable
- Z11 Encounter for screening for infectious and parasitic diseasesNon-billable
- Z11.0 Encounter for screening for intestinal infectious diseases
- Z11.1 Encounter for screening for respiratory tuberculosis
- Z11.2 Encounter for screening for other bacterial diseases
- Z11.3 Encounter for screening for infections with a predominantly sexual mode of transmission
- Z11.4 Encounter for screening for human immunodeficiency virus [HIV]
- Z11.5 Encounter for screening for other viral diseasesNon-billable
- Z11.51 Encounter for screening for human papillomavirus (HPV)
- Z11.52 Encounter for screening for COVID-19
- Z11.59 Encounter for screening for other viral diseases
- Z11.6 Encounter for screening for other protozoal diseases and helminthiases
- Z11.7 Encounter for testing for latent tuberculosis infection
- Z11.8 Encounter for screening for other infectious and parasitic diseases
- Z11.9 Encounter for screening for infectious and parasitic diseases, unspecified
About the Z11 Code Range
These encounters involve screening for infectious or parasitic diseases. The subdivisions distinguish the disease being screened for or tested.
Z11.0 addresses intestinal infections, while Z11.1 addresses respiratory tuberculosis. Other bacterial diseases, sexually transmitted infections, and HIV have separate subdivisions.
Z11.5 groups other viral diseases, with subdivisions for HPV, COVID-19, and other viral diseases. The remaining subdivisions distinguish other protozoal diseases and helminthiases, testing for latent tuberculosis infection, other infectious or parasitic diseases, and unspecified diseases.
Questions About This Page
How many billable codes are in the Z11 range?
Of the 14 codes in this range, 12 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the Z11 range classify?
The range classifies encounter for screening for infectious and parasitic diseases. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
