Z28
Immunization not carried out and underimmunization status
- Release
- FY 2027
- Effective
Official Coding Notes
Reproduced verbatim from the FY 2027 ICD-10-CM files.
Includes
vaccination not carried out
Code Also
, if applicable, encounter for immunization safety counseling ( Z71.85 )
More Specific Codes
6 codes under Z28
- Z28.0 Immunization not carried out because of contraindication Has subcodes
- Z28.1 Immunization not carried out because of patient decision for reasons of belief or group pressure Billable
- Z28.2 Immunization not carried out because of patient decision for other and unspecified reason Has subcodes
- Z28.3 Underimmunization status Has subcodes
- Z28.8 Immunization not carried out for other reason Has subcodes
- Z28.9 Immunization not carried out for unspecified reason Billable
Version History
How Z28 appears in each release imported from the official files, newest first.
-
FY 2027 Effective
CurrentImmunization not carried out and underimmunization status
-
FY 2026 Effective
UnchangedImmunization not carried out and underimmunization status
Related Codes
Codes whose official notes reference Z28
Data Source
Code information on this page is derived from the FY 2027 ICD-10-CM files published by CDC NCHS and CMS.
- Release
- FY 2027
- Effective
- Source file
- icd10cm-code-descriptions-2027.zip
Official ICD-10-CM source files (opens in a new tab)
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