Z28.39
Billable codeOther underimmunization status
The ICD-10 code for other underimmunization status is Z28.39.
Clinical notes
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Delinquent immunization status
- Lapsed immunization schedule status
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- Z28.31Underimmunization for COVID-19 statusnon-billable header
- Z28.39Other underimmunization status
Associated MS-DRGs
Z28.39 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.