ICD-10-CM category
Z20 Contact with and exposure to communicable diseases
Z20 is a category, not a billable code. Report one of the 18 complete codes below.
Codes in Z20
- Z20.01Contact with and (suspected) exposure to intestinal infectious diseases due to Escherichia coli (E. coli)
- Z20.09Contact with and (suspected) exposure to other intestinal infectious diseases
- Z20.1Contact with and (suspected) exposure to tuberculosis
- Z20.2Contact with and (suspected) exposure to infections with a predominantly sexual mode of transmission
- Z20.3Contact with and (suspected) exposure to rabies
- Z20.4Contact with and (suspected) exposure to rubella
- Z20.5Contact with and (suspected) exposure to viral hepatitis
- Z20.6Contact with and (suspected) exposure to human immunodeficiency virus [HIV]
- Z20.7Contact with and (suspected) exposure to pediculosis, acariasis and other infestations
- Z20.810Contact with and (suspected) exposure to anthrax
- Z20.811Contact with and (suspected) exposure to meningococcus
- Z20.818Contact with and (suspected) exposure to other bacterial communicable diseases
- Z20.820Contact with and (suspected) exposure to varicella
- Z20.821Contact with and (suspected) exposure to Zika virus
- Z20.822Contact with and (suspected) exposure to COVID-19
- Z20.828Contact with and (suspected) exposure to other viral communicable diseases
- Z20.89Contact with and (suspected) exposure to other communicable diseases
- Z20.9Contact with and (suspected) exposure to unspecified communicable disease
Outside the US? Z20 in the international WHO ICD-10 lists its inclusion and exclusion notes.
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ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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