2025
ICD-10-CM
Diagnosis
Code

Z28.3 Underimmunization status

  • Non-billable
  • 2016–2025

Z28.3 is a non-billable/non-specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Underimmunization status.

Use additional code

  • Code, if applicable, to identify:

    • Immunization not carried out because of contraindication (Z28.0-)

    • Immunization not carried out because of patient decision for other and unspecified reason (Z28.2-)

    • Immunization not carried out because of patient decision for reasons of belief or group pressure (Z28.1)

    • Immunization not carried out for other reason (Z28.8-)

Codes

Versions

  1. 2025

    No changes

  2. 2024

    No changes

  3. 2023

    No changes

  4. 2022

    Code changed

    • POA exempt status

        • true
        • false

    • Inclusion term

        • Delinquent immunization status
        • Lapsed immunization schedule status

    • Use additional code

        • code, if applicable, to identify:
        • immunization not carried out because of contraindication (Z28.0-)
        • immunization not carried out because of patient decision for other and unspecified reason (Z28.2-)
        • immunization not carried out because of patient decision for reasons of belief or group pressure (Z28.1)
        • immunization not carried out for other reason (Z28.8-)

  5. 2021

    No changes

  6. 2020

    No changes

  7. 2019

    No changes

  8. 2018

    No changes

  9. 2017

    No changes

  10. 2016

    New code