Chapter XXI
Factors influencing health status and contact with health services
(Z00-Z99)

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

Z20 Contact with and exposure to communicable diseases
Z20.0 Contact with and exposure to intestinal infectious diseases
Z20.1 Contact with and exposure to tuberculosis
Z20.2 Contact with and exposure to infections with a predominantly sexual mode of transmission
Z20.3 Contact with and exposure to rabies
Z20.4 Contact with and exposure to rubella
Z20.5 Contact with and exposure to viral hepatitis
Z20.6 Contact with and exposure to human immunodeficiency virus [HIV]
Excludes: asymptomatic human immunodeficiency virus [HIV] infection status ( Z21 )
Z20.7 Contact with and exposure to pediculosis, acariasis and other infestations
Z20.8 Contact with and exposure to other communicable diseases
Z20.9 Contact with and exposure to unspecified communicable disease

Z21 Asymptomatic human immunodeficiency virus [HIV] infection status
HIV positive NOS
Excludes: contact with or exposure to human immunodeficiency virus [HIV] ( Z20.6 )
human immunodeficiency virus [HIV] disease ( B20-B24 )
laboratory evidence of human immunodeficiency virus [HIV] ( R75 )

Z22 Carrier of infectious disease
Includes: suspected carrier
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
Carrier of bacterial disease due to:
· meningococci
· staphylococci
· streptococci
Z22.4 Carrier of infections with a predominantly sexual mode of transmission
Carrier of:
· gonorrhoea
· syphilis
Z22.5 Carrier of viral hepatitis
Hepatitis B surface antigen [HBsAg] carrier
Z22.6 Carrier of human T-lymphotropic virus type- 1 [HTLV-1] infection
Z22.8 Carrier of other infectious diseases
Z22.9 Carrier of infectious disease, unspecified

Z23 Need for immunization against single bacterial diseases
Excludes: immunization:
· against combinations of diseases ( Z27.- )
· not carried out ( Z28.- )
Z23.0 Need for immunization against cholera alone
Z23.1 Need for immunization against typhoid-paratyphoid alone [TAB]
Z23.2 Need for immunization against tuberculosis [BCG]
Z23.3 Need for immunization against plague
Z23.4 Need for immunization against tularaemia
Z23.5 Need for immunization against tetanus alone
Z23.6 Need for immunization against diphtheria alone
Z23.7 Need for immunization against pertussis alone
Z23.8 Need for immunization against other single bacterial diseases

Z24 Need for immunization against certain single viral diseases
Excludes: immunization:
· against combinations of diseases ( Z27.- )
· not carried out ( Z28.- )
Z24.0 Need for immunization against poliomyelitis
Z24.1 Need for immunization against arthropod-borne viral encephalitis
Z24.2 Need for immunization against rabies
Z24.3 Need for immunization against yellow fever
Z24.4 Need for immunization against measles alone
Z24.5 Need for immunization against rubella alone
Z24.6 Need for immunization against viral hepatitis

Z25 Need for immunization against other single viral diseases
Excludes: immunization:
· against combinations of diseases ( Z27.- )
· not carried out ( Z28.- )
Z25.0 Need for immunization against mumps alone
Z25.1 Need for immunization against influenza
Z25.8 Need for immunization against other specified single viral diseases

Z26 Need for immunization against other single infectious diseases
Excludes: immunization:
· against combinations of diseases ( Z27.- )
· not carried out ( Z28.- )
Z26.0 Need for immunization against leishmaniasis
Z26.8 Need for immunization against other specified single infectious diseases
Z26.9 Need for immunization against unspecified infectious disease
Need for immunization NOS

Z27 Need for immunization against combinations of infectious diseases
Excludes: immunization not carried out ( Z28.- )
Z27.0 Need for immunization against cholera with typhoid-paratyphoid [cholera + TAB]
Z27.1 Need for immunization against diphtheria-tetanus-pertussis, combined [DTP]
Z27.2 Need for immunization against diphtheria-tetanus-pertussis with typhoid-paratyphoid [DTP + TAB]
Z27.3 Need for immunization against diphtheria-tetanus-pertussis with poliomyelitis [DTP + polio]
Z27.4 Need for immunization against measles-mumps-rubella [MMR]
Z27.8 Need for immunization against other combinations of infectious diseases
Z27.9 Need for immunization against unspecified combinations of infectious diseases

Z28 Immunization not carried out
Z28.0 Immunization not carried out because of contraindication
Z28.1 Immunization not carried out because of patient's decision for reasons of belief or group pressure
Z28.2 Immunization not carried out because of patient's decision for other and unspecified reasons
Z28.8 Immunization not carried out for other reasons
Z28.9 Immunization not carried out for unspecified reason

Z29 Need for other prophylactic measures
Excludes: desensitization to allergens ( Z51.6 )
prophylactic surgery ( Z40.- )
Z29.0 Isolation
Admission to protect the individual from his or her surroundings or for isolation of individual after contact with infectious disease
Z29.1 Prophylactic immunotherapy
Administration of immunoglobulin
Z29.2 Other prophylactic chemotherapy
Chemoprophylaxis
Prophylactic antibiotic therapy
Z29.8 Other specified prophylactic measures
Z29.9 Prophylactic measure, unspecified