2022 ICD-10-CM Diagnosis Code Z28.3

Underimmunization status

    2016 2017 2018 2019 2020 2021 2022 - Converted to Parent Code Non-Billable/Non-Specific Code
  • Z28.3 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • ICD-10-CM Z28.3 is a new 2022 ICD-10-CM code that became effective on October 1, 2021.
  • This is the American ICD-10-CM version of Z28.3 - other international versions of ICD-10 Z28.3 may differ.
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Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the 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.
  • code, if applicable, to identify:
  • immunization not carried out because of contraindication (
    ICD-10-CM Diagnosis Code Z28.0

    Immunization not carried out because of contraindication

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Z28.0-
    )
  • immunization not carried out because of patient decision for other and unspecified reason (
    ICD-10-CM Diagnosis Code Z28.2

    Immunization not carried out because of patient decision for other and unspecified reason

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Z28.2-
    )
  • immunization not carried out because of patient decision for reasons of belief or group pressure (
    ICD-10-CM Diagnosis Code Z28.1

    Immunization not carried out because of patient decision for reasons of belief or group pressure

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code POA Exempt
    Applicable To
    • Immunization not carried out because of religious belief
    Z28.1
    )
  • immunization not carried out for other reason (
    ICD-10-CM Diagnosis Code Z28.8

    Immunization not carried out for other reason

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Z28.8-
    )
The following code(s) above Z28.3 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 Z28.3:
  • Z00-Z99
    2022 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
  • Z28
    ICD-10-CM Diagnosis Code Z28

    Immunization not carried out and underimmunization status

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Code Also
    • , if applicable, encounter for immunization safety counseling (Z71.85)
    Includes
    • vaccination not carried out
    Immunization not carried out and underimmunization status
Approximate Synonyms
  • Behind on immunization due to alternate schedule
  • Behind on immunizations
  • History of being underimmunized
  • History of immunization status, underimmunized
  • Immunization due
  • Not up to date with immunization due to alternative schedule
  • Not up-to-date with immunization due to alternate schedule
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): Deleted code
  • 2022 (effective 10/1/2021): New code
ICD-10-CM Codes Adjacent To Z28.3
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
Z28.29 Immunization not carried out because of patient decision for other reason
Z28.3 Underimmunization status
Z28.31 Underimmunization for COVID-19 status
Z28.310 Unvaccinated for COVID-19
Z28.311 Partially vaccinated for COVID-19
Z28.39 Other underimmunization status
Z28.8 Immunization not carried out for other reason
Z28.81 Immunization not carried out due to patient having had the disease
Z28.82 Immunization not carried out because of caregiver refusal
Z28.83 Immunization not carried out due to unavailability of vaccine
Z28.89 Immunization not carried out for other reason
Z28.9 Immunization not carried out for unspecified reason

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