Z20 ICD-10-CM Code: Contact with and (suspected) exposure to communicable diseases
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
Z20Contact with and (suspected) exposure to communicable diseases
ICD-10-CM diagnosis code · United States clinical modification
Where Z20 sits
- 1
Chapter 21
Factors influencing health status and contact with health services (Z00-Z99)
- 2
Section
Persons with potential health hazards related to communicable diseases (Z20-Z29)
- 3
Category Z20
Contact with and (suspected) exposure to communicable diseases
- 4
Code Z20
Contact with and (suspected) exposure to communicable diseases
Codes under Z20
Z20 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Z20.0Contact with and (suspected) exposure to intestinal infectious diseasesZ20.1Contact with and (suspected) exposure to tuberculosisZ20.2Contact with and (suspected) exposure to infections with a predominantly sexual mode of transmissionZ20.3Contact with and (suspected) exposure to rabiesZ20.4Contact with and (suspected) exposure to rubellaZ20.5Contact with and (suspected) exposure to viral hepatitisZ20.6Contact with and (suspected) exposure to human immunodeficiency virus [HIV]Z20.7Contact with and (suspected) exposure to pediculosis, acariasis and other infestationsZ20.8Contact with and (suspected) exposure to other communicable diseasesZ20.9Contact with and (suspected) exposure to unspecified communicable diseaseNotes for this code
Inclusion terms
No inclusion terms are listed for Z20.
Code first
No “code first” instruction is listed for Z20.
Use additional code
No “use additional code” instruction is listed for Z20.
Excludes1
Conditions that should not be reported together with this code.
- carrier of infectious disease (Z22.-)
- diagnosed current infectious or parasitic disease -see Alphabetic Index
Excludes2
Conditions not included here that may be reported separately when present.
- personal history of infectious and parasitic diseases (Z86.1-)
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code Z20 mean?
Z20 is the FY 2027 U.S. ICD-10-CM code for “Contact with and (suspected) exposure to communicable diseases.”
Is Z20 a billable or specific ICD-10-CM code?
No. Z20 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is Z20 located in ICD-10-CM?
Z20 is listed in Chapter 21, Factors influencing health status and contact with health services (Z00-Z99), within Persons with potential health hazards related to communicable diseases (Z20-Z29) (Z20–Z29), under category Z20, Contact with and (suspected) exposure to communicable diseases.
What coding notes are listed for Z20?
No inclusion terms are listed for Z20 in this reference record. No code-first instruction is listed. Excludes1 notes: carrier of infectious disease (Z22.-); diagnosed current infectious or parasitic disease -see Alphabetic Index. Excludes2 notes: personal history of infectious and parasitic diseases (Z86.1-).