2019 ICD-10-CM Diagnosis Code Z23

Encounter for immunization

    2016 2017 2018 2019 Billable/Specific Code POA Exempt
  • Z23 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM Z23 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of Z23 - other international versions of ICD-10 Z23 may differ.
Note
  • procedure codes are required to identify the types of immunizations given
Code First
Code First Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • any routine childhood examination
The following code(s) above Z23 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to Z23:
  • Z00-Z99
    2019 ICD-10-CM Range Z00-Z99

    Factors influencing health status and contact with health services

    Note
    • Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
    • (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
    • (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.
    Factors influencing health status and contact with health services
Approximate Synonyms
  • Bacillus calmette-guerin vaccination given
  • Bacterial disease vaccination given
  • Combined disease vaccination given
  • Diphtheria and tetanus vaccination given
  • Diphtheria, tetanus and acellular pertussis vaccination given
  • Diphtheria, tetanus, acellular pertussis and inactivated polio vaccinations given
  • Diphtheria, tetanus, acellular pertussis, haemophilus influenzae b and inactivated polio vaccinations given
  • Diphtheria, tetanus, acellular pertussis, hepatitis b and inactivated polio vaccinations given
  • Diphtheria, tetanus, pertussis and polio vaccination given
  • Haemophilus influenzae type b vaccination
  • Hemophilus influenzae type b vaccination done
  • Herpes zoster vaccination given
  • Human papilloma virus type 16 and 18 vaccination given
  • Human papilloma virus type 4 vaccination given
  • Human papilloma virus type 9 vaccination given
  • Human papilloma virus vaccination given
  • Influenza vaccination given
  • Influenza vaccine needed
  • Intranasal influenza vaccination given
  • Intranasal vaccination for influenza
  • Measles vaccination given
  • Measles, mumps and rubella vaccination given
  • Meningococcal b vaccination given
  • Meningococcal vaccination given
  • Mumps vaccination given
  • Need for prophylactic vaccine against single disease
  • Needs vaccination for influenza
  • Pneumococcal 13-valent conjugate vaccination given
  • Pneumococcal 23-valent polysaccharide vaccination given
  • Pneumococcal 7-valent conjugate vaccination given
  • Pneumococcal and influenza vaccinations given
  • Poliomyelitis vaccination given
  • Prophylactic vaccination for mmrv (measles, mumps, rubella with varicella) done
  • Prophylactic vaccine
  • Rabies vaccination given
  • Respiratory syncytial virus vaccination given
  • Rotavirus vaccination given
  • Rubella vaccination given
  • Tetanus toxoid vaccination given
  • Typhoid and paratyphoid vaccination given
  • Typhoid vaccination given
  • Vaccination
  • Vaccination for bacterial disease
  • Vaccination for diphtheria, tetanus and acellular pertussis (dtap)
  • Vaccination for diphtheria, tetanus, acellular pertussis and polio
  • Vaccination for diphtheria, tetanus, acellular pertussis, haemophilus influenzae type b and polio
  • Vaccination for diphtheria, tetanus, pertussis, and polio
  • Vaccination for disease combination
  • Vaccination for haemophilus influenzae type b
  • Vaccination for herpes zoster
  • Vaccination for human papilloma virus (hpv)
  • Vaccination for human papilloma virus (hpv) type 16 and 18
  • Vaccination for human papilloma virus with hpv4
  • Vaccination for human papilloma virus with hpv9
  • Vaccination for influenza
  • Vaccination for measles
  • Vaccination for measles, mumps and rubella (mmr)
  • Vaccination for measles, mumps, rubella and varicella (mmrv)
  • Vaccination for meningococcus
  • Vaccination for meningococcus b
  • Vaccination for mumps
  • Vaccination for polio
  • Vaccination for rabies
  • Vaccination for respiratory syncytial virus (rsv)
  • Vaccination for rotavirus
  • Vaccination for rubella (german measles)
  • Vaccination for single disease
  • Vaccination for streptococcus pneumoniae and influenza
  • Vaccination for streptococcus pneumoniae with pneumovax
  • Vaccination for streptococcus pneumoniae with prevnar 13
  • Vaccination for streptococcus pneumoniae with prevnar 7 for pediatric age group
  • Vaccination for tetanus and diphtheria
  • Vaccination for tetanus with tetanus toxoid
  • Vaccination for tetanus, diphtheria, acellular pertussis, hepatitis b and polio
  • Vaccination for tuberculosis (tb) with bacillus calmett-guerron
  • Vaccination for typhoid (bacteria)
  • Vaccination for typhoid and paratyphoid (bacteria)
  • Vaccination for varicella (chicken pox)
  • Vaccination for viral hepatitis
  • Vaccination for viral hepatitis a
  • Vaccination for viral hepatitis a and hepatitis b
  • Vaccination for viral hepatitis b
  • Vaccination for yellow fever
  • Vaccination given
  • Vaccination needed
  • Vaccination with combination vaccine
  • Vaccination with combination vaccine done
  • Varicella vaccination
  • Varicella vaccination done
  • Viral hepatitis a and b vaccination given
  • Viral hepatitis a vaccination given
  • Viral hepatitis b vaccination given
  • Viral hepatitis vaccination given
  • Yellow fever vaccination given
Present On Admission
POA Help
"Present On Admission" is defined as present at the time the order for inpatient admission occurs — conditions that develop during an outpatient encounter, including emergency department, observation, or outpatient surgery, are considered POA.
  • Z23 is considered exempt from POA reporting.
ICD-10-CM Z23 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 795 Normal newborn
  • 951 Other factors influencing health status

Convert Z23 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change

Diagnosis Index entries containing back-references to Z23:

ICD-10-CM Codes Adjacent To Z23
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
Z22.39 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
Z22.8 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
Z28.1 Immunization not carried out because of patient decision for reasons of belief or group pressure
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

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.