Z11 – Encounter for screening for infectious and parasitic diseases
ICD-10-CM 2027 diagnosis code · Persons encountering health services for examinations
ICD-10-CM code
Z11
- Code
Z11(claims format:Z11)- Description
- Encounter for screening for infectious and parasitic diseases
- Short description
- Encounter for screening for infec/parastc diseases
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 21. Factors influencing health status and contact with health services (Z00-Z99)
- Block
- Z00-Z13 Persons encountering health services for examinations
Billable codes under Z11
Z11 is a header code and cannot be used on claims. Choose the most specific code:
- Z11.0 – Encounter for screening for intestinal infectious diseasesBillable
- Z11.1 – Encounter for screening for respiratory tuberculosisBillable
- Z11.2 – Encounter for screening for other bacterial diseasesBillable
- Z11.3 – Encounter for screening for infections with a predominantly sexual mode of transmissionBillable
- Z11.4 – Encounter for screening for human immunodeficiency virus [HIV]Billable
- Z11.5 – Encounter for screening for other viral diseasesHeader (more codes below)
- Z11.6 – Encounter for screening for other protozoal diseases and helminthiasesBillable
- Z11.7 – Encounter for testing for latent tuberculosis infectionBillable
- Z11.8 – Encounter for screening for other infectious and parasitic diseasesBillable
- Z11.9 – Encounter for screening for infectious and parasitic diseases, unspecifiedBillable
Notes for Z11
Applicable to:
- 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):
- encounter for diagnostic examination-code to sign or symptom
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Block Z00-Z13
Notes:
- Nonspecific abnormal findings disclosed at the time of these examinations are classified to categories R70-R94.
Frequently asked questions
What is ICD-10 code Z11?
Z11 is the ICD-10-CM code for encounter for screening for infectious and parasitic diseases, in the block Z00-Z13 (Persons encountering health services for examinations).
Is Z11 a billable code?
No. Z11 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.