ICD-10-CM Codes
Z00-Z99
Z20-Z29
Z28-
2023 ICD-10-CM Diagnosis Code Z28

2023 ICD-10-CM Diagnosis Code Z28

Immunization not carried out and underimmunization status

2016

2017

2018

2019

2020

2021

2022

2023

Non-Billable/Non-Specific Code

Z28 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
The 2023 edition of ICD-10-CM Z28 became effective on October 1, 2022.
This is the American ICD-10-CM version of Z28 - other international versions of ICD-10 Z28 may differ.

Code Also

Code Also Help

A code also note instructs that 2 codes may be required to fully describe a condition but the sequencing of the two codes is discretionary, depending on the severity of the conditions and the reason for the encounter.

, if applicable, encounter for immunization safety counseling (
ICD-10-CM Diagnosis Code Z71.85
Encounter for immunization safety counseling
Applicable To
- Encounter for vaccine product safety counseling
Code Also
- , if applicable, encounter for immunization (Z23)
Type 1 Excludes
- encounter for health counseling related to travel (Z71.84)
Z71.85
)

Includes

Includes Help

"Includes" further defines, or give examples of, the content of the code or category.

vaccination not carried out

The following code(s) above Z28 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 Z28:

Z00-Z99
2023 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

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
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change
2022 (effective 10/1/2021): No change
2023 (effective 10/1/2022): No change

ICD-10-CM Codes Adjacent To Z28

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

Z22.7 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

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

Z28.21 Immunization not carried out because of patient refusal

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

2023 ICD-10-CM Diagnosis Code Z28

Immunization not carried out and underimmunization status

Encounter for immunization safety counseling

Factors influencing health status and contact with health services