Z20
⚠ Non-billable (Header)Contact with and (suspected) exposure to communicable diseases
Factors influencing health status and contact with health services (Z00-Z99)
⚠️ This is a category header code — not billable. Use a more specific child code below.
❌ Excludes1
directCannot be coded with Z20
- • carrier of infectious disease (Z22.-)
- • diagnosed current infectious or parasitic disease -see Alphabetic Index
⚠️ Excludes2
directMay be coded together if both conditions coexist
- • personal history of infectious and parasitic diseases (Z86.1-)
Child Codes (10)
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 disease
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CodeZ20
BillableNo — Header code
CategoryFactors influencing health status and contact with health services (Z00-Z99)
Excludes12 rule(s)
Excludes21 note(s)
Child codes10
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)