Z11.9
Billable codeEncounter for screening for infectious and parasitic diseases, unspecified
The ICD-10 code for encounter for screening for infectious and parasitic diseases, unspecified is Z11.9.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This code describes an unspecified presentation. If the medical record documents a more specific detail (e.g. laterality, type, or affected site), a more specific sibling code should be used instead — see Related codes below.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- Z11.0Encounter for screening for intestinal infectious diseases
- Z11.1Encounter for screening for respiratory tuberculosis
- Z11.2Encounter for screening for other bacterial diseases
- Z11.3Encounter for screening for infections with a predominantly sexual mode of transmission
- Z11.4Encounter for screening for human immunodeficiency virus [HIV]
- Z11.5Encounter for screening for other viral diseasesnon-billable header
- Z11.6Encounter for screening for other protozoal diseases and helminthiases
- Z11.7Encounter for testing for latent tuberculosis infection
- Z11.8Encounter for screening for other infectious and parasitic diseases
- Z11.9Encounter for screening for infectious and parasitic diseases, unspecified
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- V759
Associated MS-DRGs
Z11.9 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.