Z282026
Non-billable
Immunization not carried out and underimmunization status
Z28 is a non-billable ICD-10-CM category (header) code for Immunization not carried out and underimmunization status; a more specific code below it is required for claims in the FY2026 code set.
Clinical Notes
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Code Hierarchy
Z28
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Official Guidelines
Chapter 21: Factors Influencing Health Status
Official coding guidelines for Z00-Z99