All ICD10 Codes
Chapter 21

Z00–Z99: Factors Influencing Health Status and Contact with Health Services

Factors Influencing Health Status and Contact with Health Services diagnostic classification updated for 2026.

All CodesBillable Only
Internal Codes
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  • Z20.5—

    Contact with and (suspected) exposure to viral hepatitis

  • Z20.6—

    Contact with and (suspected) exposure to human immunodeficiency virus [HIV]

  • Z20.7—

    Contact with and (suspected) exposure to pediculosis, acariasis and other infestations

  • Z20.8—

    Contact with and (suspected) exposure to other communicable diseases

  • Z20.81—

    Contact with and (suspected) exposure to other bacterial communicable diseases

  • Z20.810—

    Contact with and (suspected) exposure to anthrax

  • Z20.811—

    Contact with and (suspected) exposure to meningococcus

  • Z20.818—

    Contact with and (suspected) exposure to other bacterial communicable diseases

  • Z20.82—

    Contact with and (suspected) exposure to other viral communicable diseases

  • Z20.820—

    Contact with and (suspected) exposure to varicella

  • Z20.821—

    Contact with and (suspected) exposure to Zika virus

  • Z20.822—

    Contact with and (suspected) exposure to COVID-19

  • Z20.828—

    Contact with and (suspected) exposure to other viral communicable diseases

  • Z20.89—

    Contact with and (suspected) exposure to other communicable diseases

  • Z20.9—

    Contact with and (suspected) exposure to unspecified communicable disease

  • Z21—

    Asymptomatic human immunodeficiency virus [HIV] infection status

  • Z22—

    Carrier of infectious disease

  • Z22.0—

    Carrier of typhoid

  • Z22.1—

    Carrier of other intestinal infectious diseases

  • Z22.2—

    Carrier of diphtheria

  • Z22.3—

    Carrier of other specified bacterial diseases

  • Z22.31—

    Carrier of bacterial disease due to meningococci

  • Z22.32—

    Carrier of bacterial disease due to staphylococci

  • Z22.321—

    Carrier or suspected carrier of Methicillin susceptible Staphylococcus aureus

  • Z22.322—

    Carrier or suspected carrier of Methicillin resistant Staphylococcus aureus

  • Z22.33—

    Carrier of bacterial disease due to streptococci

  • Z22.330—

    Carrier of Group B streptococcus

  • Z22.338—

    Carrier of other streptococcus

  • Z22.34—

    Carrier of Acinetobacter baumannii

  • Z22.340—

    Carrier of carbapenem-resistant Acinetobacter baumannii

  • Z22.341—

    Carrier of carbapenem-sensitive Acinetobacter baumannii

  • Z22.349—

    Carrier of Acinetobacter baumannii, unspecified

  • Z22.35—

    Carrier of Enterobacterales

  • Z22.350—

    Carrier of carbapenem-resistant Enterobacterales

  • Z22.358—

    Carrier of other Enterobacterales

  • Z22.359—

    Carrier of Enterobacterales, unspecified

  • Z22.39—

    Carrier of other specified bacterial diseases

  • Z22.4—

    Carrier of infections with a predominantly sexual mode of transmission

  • Z22.6—

    Carrier of human T-lymphotropic virus type-1 [HTLV-1] infection

  • Z22.7—

    Latent tuberculosis

  • Z22.8—

    Carrier of other infectious diseases

  • Z22.9—

    Carrier of infectious disease, unspecified

  • Z23—

    Encounter for immunization

  • Z28—

    Immunization not carried out and underimmunization status

  • Z28.0—

    Immunization not carried out because of contraindication

  • Z28.01—

    Immunization not carried out because of acute illness of patient

  • Z28.02—

    Immunization not carried out because of chronic illness or condition of patient

  • Z28.03—

    Immunization not carried out because of immune compromised state of patient

  • Z28.04—

    Immunization not carried out because of patient allergy to vaccine or component

  • Z28.09—

    Immunization not carried out because of other contraindication

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