Z23
BillableEncounter for immunization
Encounter for immunization
Coding Notes
Code First
The underlying condition must be sequenced before this code
- any routine childhood examination
Code Also
A second code may be required; sequencing depends on circumstances
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(143)
SNOMED CT
- Travel vaccination given148297000
- Pneumococcal vaccination given170337005
- 1st Hib and DTP vaccine given170428009
- First Haemophilus influenzae type b and diphtheria, tetanus and pertussis vaccine given170428009
- 2nd Hib and DTP vaccine given170429001
- Second Haemophilus influenzae type b and diphtheria, tetanus and pertussis vaccine given170429001
- 3rd Hib and DTP vaccine given170430006
- Third Haemophilus influenzae type b and diphtheria, tetanus and pertussis vaccine given170430006
- Has influenza vaccination at home185900003
- Has influenza vaccination at surgery185901004
- Has influenza vaccination at hospital185902006
- Influenza vaccination status308532005
- Has influenza vaccination at work416928007
- Procedure needed417451006
- Measles vaccination requested699027001
- Vaccination given713404003
- Administration of human papilloma virus type 6, 11, 16, and 18 vaccine done734154002
- Influenza vaccination requested736818002
- Human papillomavirus (HPV) 6, 11, 16, 18, 31, 33, 45, 52 and 58 vaccination given1209199006
- Human papillomavirus 6, 11, 16, 18, 31, 33, 45, 52 and 58 vaccination given1209199006
- Haemophilus influenza type B vaccination given1234918000
- Varicella-zoster vaccination given1234919008
- Diphtheria + tetanus + acellular pertussis +inactivated polio vaccinations given1234920002
- Diphtheria and acellular pertussis and inactivated poliomyelitis and tetanus vaccination given1234920002
- Varicella-zoster vaccination for chicken pox given1234922005
- Bacillus Calmette-Guerin (BCG) vaccination given151071000119107
- Bacillus Calmette-Guerin vaccination given151071000119107
- Cholera vaccination given150921000119100
- Diphtheria and tetanus and acellular pertussis and Haemophilus influenzae type b and inactivated poliomyelitis vaccination given138971000119103
- Diphtheria and tetanus and acellular pertussis and Hepatitis b and inactivated poliomyelitis vaccination given116391000119108
- Diphtheria and tetanus vaccination given151051000119103
- Diphtheria vaccination given150931000119102
- Diphtheria, tetanus and acellular pertussis vaccination given132751000119107
- Diphtheria, tetanus, pertussis and polio vaccination given150951000119108
- Herpes zoster vaccination given105941000119105
- Vaccination for herpes zoster given105941000119105
- Varicella zoster vaccination for shingles given105941000119105
- Varicella-zoster vaccination for shingles given105941000119105
- Human papilloma virus type 16 and 18 vaccination given140611000119104
- Vaccination for HPV (human papilloma virus) type 16 and 18 given140611000119104
- Human papilloma virus vaccination given99501000119107
- Vaccination for HPV (human papilloma virus) given99501000119107
- Influenza A H1N1 vaccination given135221000119101
- Influenza vaccination given73701000119109
- Vaccination for influenza given73701000119109
- Intranasal influenza vaccination given135231000119103
- Measles vaccination given150961000119105
- Measles, mumps and rubella vaccination given150971000119104
- Meningococcus vaccination given39361000119108
- Mumps vaccination given150981000119101
- Vaccination for mumps given150981000119101
- Pneumococcal 13-valent conjugate vaccination given139791000119105
- Pneumococcal 20-valent conjugate vaccination given942340951000119102
- Pneumococcal 23-valent polysaccharide vaccination given77891000119100
- Pneumococcal 7-valent conjugate vaccination given43961000119109
- Poliomyelitis vaccination given151011000119104
- RSV (respiratory syncytial virus) vaccination given71191000119100
- Respiratory syncytial virus vaccination given71191000119100
- Rabies vaccination given151021000119106
- Rotavirus vaccination given98331000119100
- Rubella vaccination given151031000119109
- Tetanus toxoid vaccination given151061000119101
- Vaccination for tetanus toxoid given151061000119101
- Typhoid vaccination given117841000119108
- Vaccination for viral hepatitis A given43941000119105
- Viral hepatitis A vaccination given43941000119105
- Vaccination for viral hepatitis B given39031000119103
- Viral hepatitis B vaccination given39031000119103
- Vaccination needed122541000119104
- Viral hepatitis A and B vaccination given286941000119101
- Yellow fever vaccination given151111000119100
Clinical Terms
- 1st Hib and DTP vaccine given
- Diphtheria vaccination given
- Human papillomavirus (HPV) 6, 11, 16, 18, 31, 33, 45, 52 and 58 vaccination given
- Vaccination for tetanus toxoid given
- Haemophilus influenza type B vaccination given
- Human papilloma virus vaccination given
- Pneumococcal 7-valent conjugate vaccination given
- Pneumococcal 20-valent conjugate vaccination given
- Varicella-zoster vaccination given
- Viral hepatitis B vaccination given
- Has influenza vaccination at surgery
- Tetanus toxoid vaccination given
- Has influenza vaccination at work
- Vaccination for viral hepatitis A given
- Varicella-zoster vaccination for shingles given
- Vaccination for mumps given
- Measles vaccination requested
- Diphtheria and tetanus and acellular pertussis and Haemophilus influenzae type b and inactivated poliomyelitis vaccination given
- Typhoid vaccination given
- Measles vaccination given
- Diphtheria + tetanus + acellular pertussis +inactivated polio vaccinations given
- Has influenza vaccination at hospital
- Influenza vaccination status
- Vaccination for herpes zoster given
- 2nd Hib and DTP vaccine given
- Influenza vaccination requested
- Rabies vaccination given
- Rotavirus vaccination given
- Travel vaccination given
- First Haemophilus influenzae type b and diphtheria, tetanus and pertussis vaccine given
- Human papillomavirus 6, 11, 16, 18, 31, 33, 45, 52 and 58 vaccination given
- Vaccination for influenza given
- RSV (respiratory syncytial virus) vaccination given
- Vaccination for HPV (human papilloma virus) given
- Vaccination for HPV (human papilloma virus) type 16 and 18 given
- Administration of human papilloma virus type 6, 11, 16, and 18 vaccine done
- Diphtheria, tetanus and acellular pertussis vaccination given
- Influenza A H1N1 vaccination given
- Vaccination given
- Cholera vaccination given
- Pneumococcal 23-valent polysaccharide vaccination given
- Herpes zoster vaccination given
- Intranasal influenza vaccination given
- Vaccination for viral hepatitis B given
- Varicella-zoster vaccination for chicken pox given
- Viral hepatitis A and B vaccination given
- Procedure needed
- Rubella vaccination given
- Pneumococcal 13-valent conjugate vaccination given
- Diphtheria and acellular pertussis and inactivated poliomyelitis and tetanus vaccination given
- Varicella zoster vaccination for shingles given
- Yellow fever vaccination given
- Pneumococcal vaccination given
- Measles, mumps and rubella vaccination given
- Diphtheria and tetanus vaccination given
- Has influenza vaccination at home
- Viral hepatitis A vaccination given
- 3rd Hib and DTP vaccine given
- Human papilloma virus type 16 and 18 vaccination given
- Respiratory syncytial virus vaccination given
- Diphtheria, tetanus, pertussis and polio vaccination given
- Influenza vaccination given
- Meningococcus vaccination given
- Poliomyelitis vaccination given
- Diphtheria and tetanus and acellular pertussis and Hepatitis b and inactivated poliomyelitis vaccination given
- Vaccination needed
- Bacillus Calmette-Guerin (BCG) vaccination given
- Third Haemophilus influenzae type b and diphtheria, tetanus and pertussis vaccine given
- Second Haemophilus influenzae type b and diphtheria, tetanus and pertussis vaccine given
- Bacillus Calmette-Guerin vaccination given
- Mumps vaccination given
Frequently Asked Questions
What is the ICD-10 code for encounter for immunization?
The ICD-10-CM code for encounter for immunization is Z23. The full clinical description is "Encounter for immunization". Z23 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code Z23 mean?
ICD-10-CM code Z23 represents “Encounter for immunization”. It is classified under Chapter 22: Factors Influencing Health Status and Contact With Health Services and is a billable/specific code that can be used on a claim.
Is Z23 a billable code?
Yes, Z23 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is Z23 in?
Z23 is in Chapter 22: Factors Influencing Health Status and Contact With Health Services (codes Z00-Z99).
What SNOMED CT codes does Z23 map to?
Z23 maps to 54 SNOMED CT concepts: 170428009, 170429001, 170430006, 734154002, 151071000119107, and 49 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for Z23?
Z23 is linked to 1 UMLS Concept Unique Identifier: C2910668. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does Z23 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like encounter for immunization affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of Z23?
Z23 maps to the ICD-11 code: QC00.Z (Need for immunization against single bacterial diseases, unspecified).
Automate ICD-10 Coding With AI
Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.
Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.