Z11 is the authoritative medical code for Encounter for screening for infectious and parasitic diseases. This classification is used in medical billing and clinical recording to specify the clinical criteria for encounter for screening for infectious and parasitic diseases (ICD-10-CM Z11), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Encounter for screening for infectious and parasitic diseases is a non-billable ICD-10-CM category code Z11. A more specific billable subcode must be selected for claims submission. 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): encounter for diagnostic examination-code to sign or symptom. Excludes2 (not included here): examinations related to pregnancy and reproduction (Z30-Z36, Z39.-).
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for Z11 in the official ICD-10-CM tabular list.
Inclusion Terms
Alternative terms the tabular list files under this 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.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- encounter for diagnostic examination-code to sign or symptom
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- examinations related to pregnancy and reproduction (Z30-Z36, Z39.-)
Frequently Asked Questions (FAQ) & Clinical Guidance
Can Z11 be billed directly?
No. Z11 (Encounter for screening for infectious and parasitic diseases) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
What can't be coded together with Z11?
Per Excludes1 instructions, Z11 must not be reported with: encounter for diagnostic examination-code to sign or symptom.
Can Z11 be reported alongside related conditions?
Per Excludes2 instructions, Z11 and the following may both be reported when both are present: examinations related to pregnancy and reproduction (Z30-Z36, Z39.-).
What conditions are included under Z11?
Encounter for screening for infectious and parasitic diseases includes: 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..
Codes in This Family (13)
Official ICD-10-CM classifications in the same code family as Z11, with their registry titles.
- 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 diseases
- 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
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code Z08
Encounter for follow-up examination after completed treatment for malignant neoplasm
ICD Code Z09
Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm
ICD Code Z12
Encounter for screening for malignant neoplasms
ICD Code Z13
Encounter for screening for other diseases and disorders