Z20-Z29 ICD-10-CA block: Persons with potential health hazards related to communicable diseases
Z20-Z29 isn’t a code on its own. Choose one of the 66 codes beneath it, the one the documentation supports.
Official description
Z20-Z29Persons with potential health hazards related to communicable diseases (Z20-Z29)
ICD-10-CA · Canada
Codes in Z20-Z29
Z20-Z29 isn’t a code on its own. Open the group that matches what the note documents.
Z20Contact with and exposure to communicable diseases (10 codes)Z21Asymptomatic human immunodeficiency virus [HIV] infection statusZ22Carrier of infectious disease (16 codes)Z23Need for immunization against single bacterial diseases (9 codes)Z24Need for immunization against certain single viral diseases (7 codes)Z25Need for immunization against other single viral diseases (3 codes)Z26Need for immunization against other single infectious diseases (3 codes)Z27Need for immunization against combinations of infectious diseases (7 codes)Z28Immunization not carried out (5 codes)Z29Need for other prophylactic measures (5 codes)Notes for Z20-Z29
As CIHI prints them, with any note Z20-Z29 takes from the headings above it.
Note
- This chapter should not be used for international comparison or for primary mortality coding.Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as "diagnoses" or "problems". This can arise in two main ways:(a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination or to discuss a problem which is in itself not a disease or injury.(b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury. Such factors may be elicited during population surveys, when the person may or may not be currently sick, or be recorded as an additional factor to be borne in mind when the person is receiving care for some illness or injury.From Chapter 21: Factors influencing health status and contact with health services (Z00-Z99)
Where Z20-Z29 sits
- 1ChapterChapter 21: Factors influencing health status and contact with health services (Z00-Z99)
- 2Block Z20-Z29Persons with potential health hazards related to communicable diseases
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
Is Z20-Z29 a valid ICD-10-CA code?
No. Z20-Z29 (Persons with potential health hazards related to communicable diseases) is a block heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 66 codes; record the one the documentation supports.
Where is Z20-Z29 in ICD-10-CA?
Z20-Z29 sits under Chapter 21: Factors influencing health status and contact with health services (Z00-Z99).
What coding notes apply to Z20-Z29?
ICD-10-CA lists Note notes for Z20-Z29, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.
Codes beside Z20-Z29
Z00-Z13Persons encountering health services for examination and investigationZ30-Z39Persons encountering health services in circumstances related to reproductionZ40-Z54Persons encountering health services for specific procedures and health careZ55-Z65Persons with potential health hazards related to socioeconomic and psychosocial circumstancesZ70-Z76Persons encountering health services in other circumstancesZ80-Z99Persons with potential health hazards related to family and personal history and certain conditions influencing health status