ICD-10 Z11
Non-Billable HeaderEncounter for screening for infectious and parasitic diseases
About ICD-10-CM Z11
ICD-10-CM code Z11 represents Encounter for screening for infectious and parasitic diseases. This is a non-billable header code in the Factors Influencing Health Status chapter (block Z11). The 2026 edition of ICD-10-CM Z11 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under Z11. Per CMS ICD-10-CM Tabular 2026.
- 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
Pure excludes, these codes can never be coded together with Z11. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- encounter for diagnostic examination-code to sign or symptom
Medicare LCD Coverage for Z11
Local Coverage Determinations (LCDs) from CMS MACs that list Z11 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing Z11.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but Z11 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with Z11
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 99354 Preventive care visit for adults Family Medicine
- 99401 Preventive care visit for infants and children Family Medicine
- 99402 Preventive care visit for adolescents Family Medicine
- 99403 Preventive care visit for adults 40-64 years old Family Medicine
- 99356 Preventive care visit for adults 65 years and older Family Medicine
Codes Adjacent To Z11
Other codes in section Z00-Z13 (Persons encountering health services for examinations).
ICD-10 Z11, Billing FAQ
Is ICD-10 code Z11 billable? +
No, Z11 is a non-billable header code. Use a more specific child code from block Z11 when submitting claims.
What other names or terms map to Z11? +
ICD-10 Z11 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..
What codes are Type 1 Excludes for Z11? +
Type 1 Excludes (never code together with Z11): encounter for diagnostic examination-code to sign or symptom
What CPT codes are commonly billed with Z11? +
Procedures frequently paired with Z11 include: 99354, 99401, 99402, 99403, 99356.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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