Z20 ICD-10-CA category: Contact with and exposure to communicable diseases
Z20 isn’t a code on its own. Choose one of the 10 codes beneath it, the one the documentation supports.
Official description
Z20Contact with and exposure to communicable diseases
ICD-10-CA · Canada
Codes in Z20
Z20 isn’t a code on its own. Open the code that matches what the note documents.
Z20.0Contact with and exposure to intestinal infectious diseasesZ20.1Contact with and exposure to tuberculosisZ20.2Contact with and exposure to infections with a predominantly sexual mode of transmissionZ20.3Contact with and exposure to rabiesZ20.4Contact with and exposure to rubellaZ20.5Contact with and exposure to viral hepatitisZ20.6Contact with and exposure to human immunodeficiency virus [HIV]Z20.7Contact with and exposure to pediculosis, acariasis and other infestationsZ20.8Contact with and exposure to other communicable diseasesZ20.9Contact with and exposure to unspecified communicable diseaseNotes for Z20
As CIHI prints them, with any note Z20 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 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
- 3Category Z20Contact with and exposure 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 a valid ICD-10-CA code?
No. Z20 (Contact with and exposure to communicable diseases) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 10 codes; record the one the documentation supports.
Where is Z20 in ICD-10-CA?
Z20 sits under Z20-Z29 Persons with potential health hazards related to communicable diseases, within Chapter 21: Factors influencing health status and contact with health services (Z00-Z99).
What coding notes apply to Z20?
ICD-10-CA lists Note notes for Z20, 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
View Z20-Z29Z21Asymptomatic human immunodeficiency virus [HIV] infection statusZ22Carrier of infectious diseaseZ23Need for immunization against single bacterial diseasesZ24Need for immunization against certain single viral diseasesZ25Need for immunization against other single viral diseasesZ26Need for immunization against other single infectious diseasesZ27Need for immunization against combinations of infectious diseasesZ28Immunization not carried outZ29Need for other prophylactic measures