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ICD-10-CM 2027 diagnosis code

Z28.0Immunization not carried out because of contraindication

Not billable — use a more specific code

Z28.0 is a header code, so it can't be reported by itself. Choose one of the 5 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Z28.0

Z28.0 is the ICD-10-CM diagnosis code for immunization not carried out because of contraindication. It belongs to category Z28 (immunization not carried out and underimmunization status), block Z20-Z29 (persons with potential health hazards related to communicable diseases) and chapter 21 (factors influencing health status and contact with health services). It is a header code, so it can't be reported by itself; one of its 5 subcodes must be used instead.

Within Z28 (immunization not carried out and underimmunization status), Z28.0 is specifically for immunization not carried out because of contraindication. Related codes cover immunization not carried out because of patient decision for reasons of belief or group pressure (Z28.1), immunization not carried out because of patient decision for other and unspecified reason (Z28.2), underimmunization status (Z28.3), immunization not carried out for other reason (Z28.8) and immunization not carried out for unspecified reason (Z28.9).

To report this condition, pick the subcode that matches the documentation: Z28.01 (patient), Z28.02 (patient), Z28.03 (patient), Z28.04 (component) and Z28.09 (contraindication).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under Z28.0

Notes that apply from higher levels

Instructions written at a parent level also apply to Z28.0.

› From Z28 Immunization not carried out and underimmunization status
Includes
  • vaccination not carried out
Code also
  • , if applicable, encounter for immunization safety counseling (Z71.85)

Broader instructions also apply from Chapter 21: Factors influencing health status and contact with health services.

Codes whose notes reference Z28.0

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about Z28.0

Is Z28.0 billable?

No. Z28.0 is a header code. Report one of its more specific subcodes instead.