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ICD-10-CM 2027 diagnosis code

Z11Encounter for screening for infectious and parasitic diseases

Not billable — use a more specific code

Z11 is a header code, so it can't be reported by itself. Choose one of the 10 more specific codes beneath it.Short description: Encounter for screening for infec/parastc diseases

Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS, effective October 1, 2026. Updated September 29, 2026. About our data

About Z11

Z11 is the ICD-10-CM diagnosis code for encounter for screening for infectious and parasitic diseases. It belongs to block Z00-Z13 (persons encountering health services for examinations) and chapter 21 (factors influencing health status and contact with health services). It is a header code, so it can't be reported by itself; one of its 10 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: Z11.0 (diseases), Z11.1 (tuberculosis), Z11.2 (diseases), Z11.3 (transmission), Z11.4 ([HIV]), Z11.5 (diseases), Z11.6 (helminthiases), Z11.7 (infection) and 2 more.

Don't report Z11 together with the conditions in its Excludes1 note: encounter for diagnostic examination-code to sign or symptom.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under Z11

Coding notes

Applicable toConditions and synonyms classified to 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.
Excludes1Not coded here — never report together with this code
  • encounter for diagnostic examination-code to sign or symptom

Notes that apply from higher levels

Instructions written at a parent level also apply to Z11.

Broader instructions also apply from Z00-Z13 Persons encountering health services for examinations and Chapter 21: Factors influencing health status and contact with health services.

Codes whose notes reference Z11

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about Z11

Is Z11 billable?

No. Z11 is a header code. Report one of its more specific subcodes instead.