ICD-10-CM Book 2024 Edition

Chapters  /  Chapter 21  /  Z20-Z29

Persons with potential health hazards related to communicable diseases (Z20-Z29)

Z20 Contact with and (suspected) exposure to communicable diseases
Excludes1 carrier of infectious disease (Z22.-)
diagnosed current infectious or parasitic disease -see Alphabetic Index
Excludes2 personal history of infectious and parasitic diseases (Z86.1-)
Z20.0 Contact with and (suspected) exposure to intestinal infectious diseases
Z20.01 Contact with and (suspected) exposure to intestinal infectious diseases due to Escherichia coli (E. coli)
Z20.09 Contact with and (suspected) exposure to other intestinal infectious diseases
nonPrimary Yes
Z20.1 Contact with and (suspected) exposure to tuberculosis
nonPrimary Yes
Z20.2 Contact with and (suspected) exposure to infections with a predominantly sexual mode of transmission
nonPrimary Yes
Z20.3 Contact with and (suspected) exposure to rabies
nonPrimary Yes
Z20.4 Contact with and (suspected) exposure to rubella
nonPrimary Yes
Z20.5 Contact with and (suspected) exposure to viral hepatitis
Z20.6 Contact with and (suspected) exposure to human immunodeficiency virus [HIV]
Excludes1 asymptomatic human immunodeficiency virus [HIV]
HIV infection status (Z21)
Z20.7 Contact with and (suspected) exposure to pediculosis, acariasis and other infestations
nonPrimary Yes
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
nonPrimary Yes
Z20.811 Contact with and (suspected) exposure to meningococcus
Z20.818 Contact with and (suspected) exposure to other bacterial communicable diseases
nonPrimary Yes
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
nonPrimary Yes
Z20.822 Contact with and (suspected) exposure to COVID-19
Contact with and (suspected) exposure to SARS-CoV-2
Z20.828 Contact with and (suspected) exposure to other viral communicable diseases
Z20.89 Contact with and (suspected) exposure to other communicable diseases
nonPrimary Yes
Z20.9 Contact with and (suspected) exposure to unspecified communicable disease
nonPrimary Yes
Z21 Asymptomatic human immunodeficiency virus [HIV] infection status
HIV positive NOS
CodeFirst Human immunodeficiency virus [HIV] disease complicating pregnancy, childbirth and the puerperium, if applicable (O98.7-)
Excludes1 acquired immunodeficiency syndrome (B20)
contact with human immunodeficiency virus [HIV] (Z20.6)
exposure to human immunodeficiency virus [HIV] (Z20.6)
human immunodeficiency virus [HIV] disease (B20)
inconclusive laboratory evidence of human immunodeficiency virus [HIV] (R75)
invalidAdmission Yes
Z22 Carrier of infectious disease
Includes colonization status
suspected carrier
Excludes2 carrier of viral hepatitis (B18.-)
Z22.0 Carrier of typhoid
nonPrimary Yes
Z22.1 Carrier of other intestinal infectious diseases
nonPrimary Yes
Z22.2 Carrier of diphtheria
nonPrimary Yes
Z22.3 Carrier of other specified bacterial diseases
Z22.31 Carrier of bacterial disease due to meningococci
nonPrimary Yes
Z22.32 Carrier of bacterial disease due to staphylococci
Z22.321 Carrier or suspected carrier of Methicillin susceptible Staphylococcus aureus
MSSA colonization
nonPrimary Yes
Z22.322 Carrier or suspected carrier of Methicillin resistant Staphylococcus aureus
MRSA colonization
nonPrimary Yes
Z22.33 Carrier of bacterial disease due to streptococci
Z22.330 Carrier of Group B streptococcus
Excludes1 Carrier of streptococcus group B (GBS) complicating pregnancy, childbirth and the puerperium (O99.82-)
nonPrimary Yes
Z22.338 Carrier of other streptococcus
nonPrimary Yes
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
Carrier of E. coli
Carrier of K. pneumoniae
Z22.350 Carrier of carbapenem-resistant Enterobacterales
Z22.358 Carrier of other Enterobacterales
Carrier of carbapenem-sensitive Enterobacterales
Carrier of ESBL-producing Enterobacterales
Carrier of extended-spectrum beta-lactamase producing Enterobacterales
Z22.359 Carrier of Enterobacterales, unspecified
Z22.39 Carrier of other specified bacterial diseases
nonPrimary Yes
Z22.4 Carrier of infections with a predominantly sexual mode of transmission
nonPrimary Yes
Z22.6 Carrier of human T-lymphotropic virus type-1 [HTLV-1] infection
nonPrimary Yes
Z22.7 Latent tuberculosis
Latent tuberculosis infection (LTBI)
Excludes1 nonspecific reaction to cell mediated immunity measurement of gamma interferon antigen response without active tuberculosis (R76.12)
nonspecific reaction to tuberculin skin test without active tuberculosis (R76.11)
Z22.8 Carrier of other infectious diseases
nonPrimary Yes
Z22.9 Carrier of infectious disease, unspecified
nonPrimary Yes
Z23 Encounter for immunization
CodeFirst any routine childhood examination
CodeAlso , if applicable, encounter for immunization safety counseling (Z71.85)
Notes procedure codes are required to identify the types of immunizations given
nonPrimary Yes
Z28 Immunization not carried out and underimmunization status
Includes vaccination not carried out
CodeAlso , if applicable, encounter for immunization safety counseling (Z71.85)
Z28.0 Immunization not carried out because of contraindication
Z28.01 Immunization not carried out because of acute illness of patient
nonPrimary Yes
Z28.02 Immunization not carried out because of chronic illness or condition of patient
nonPrimary Yes
Z28.03 Immunization not carried out because of immune compromised state of patient
nonPrimary Yes
Z28.04 Immunization not carried out because of patient allergy to vaccine or component
nonPrimary Yes
Z28.09 Immunization not carried out because of other contraindication
nonPrimary Yes
Z28.1 Immunization not carried out because of patient decision for reasons of belief or group pressure
Immunization not carried out because of religious belief
nonPrimary Yes
Z28.2 Immunization not carried out because of patient decision for other and unspecified reason
Z28.20 Immunization not carried out because of patient decision for unspecified reason
nonPrimary Yes
Z28.21 Immunization not carried out because of patient refusal
nonPrimary Yes
Z28.29 Immunization not carried out because of patient decision for other reason
nonPrimary Yes
Z28.3 Underimmunization status
UseAdditionalCode code, if applicable, to identify:
immunization not carried out because of contraindication (Z28.0-)
immunization not carried out because of patient decision for other and unspecified reason (Z28.2-)
immunization not carried out because of patient decision for reasons of belief or group pressure (Z28.1)
immunization not carried out for other reason (Z28.8-)
nonPrimary Yes
Z28.31 Underimmunization for COVID-19 status
Notes These codes should not be used for individuals who are not eligible for the COVID-19 vaccines, as determined by the healthcare provider.
Z28.310 Unvaccinated for COVID-19
Z28.311 Partially vaccinated for COVID-19
Z28.39 Other underimmunization status
Delinquent immunization status
Lapsed immunization schedule status
Z28.8 Immunization not carried out for other reason
Z28.81 Immunization not carried out due to patient having had the disease
nonPrimary Yes
Z28.82 Immunization not carried out because of caregiver refusal
Immunization not carried out because of guardian refusal
Immunization not carried out because of parent refusal
Excludes1 immunization not carried out because of caregiver refusal because of religious belief (Z28.1)
nonPrimary Yes
Z28.83 Immunization not carried out due to unavailability of vaccine
Delay in delivery of vaccine
Lack of availability of vaccine
Manufacturer delay of vaccine
nonPrimary Yes
Z28.89 Immunization not carried out for other reason
nonPrimary Yes
Z28.9 Immunization not carried out for unspecified reason
nonPrimary Yes
Z29 Encounter for other prophylactic measures
Excludes1 desensitization to allergens (Z51.6)
prophylactic surgery (Z40.-)
Z29.1 Encounter for prophylactic immunotherapy
Encounter for administration of immunoglobulin
Z29.11 Encounter for prophylactic immunotherapy for respiratory syncytial virus (RSV)
nonPrimary Yes
Z29.12 Encounter for prophylactic antivenin
nonPrimary Yes
Z29.13 Encounter for prophylactic Rho(D) immune globulin
nonPrimary Yes
Z29.14 Encounter for prophylactic rabies immune globin
nonPrimary Yes
Z29.3 Encounter for prophylactic fluoride administration
nonPrimary Yes
Z29.8 Encounter for other specified prophylactic measures
nonPrimary Yes
Z29.81 Encounter for HIV pre-exposure prophylaxis
CodeAlso , if applicable, risk factors for HIV, such as:
contact with and (suspected) exposure to human immunodeficiency virus [HIV] (Z20.6)
high risk sexual behavior (Z72.5-)
Z29.89 Encounter for other specified prophylactic measures
Z29.9 Encounter for prophylactic measures, unspecified
nonPrimary Yes