Z28.21
Billable codeImmunization not carried out because of patient refusal
The ICD-10 code for immunization not carried out because of patient refusal is Z28.21.
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
- Z28.20Immunization not carried out because of patient decision for unspecified reason
- Z28.29Immunization not carried out because of patient decision for other reason
- Z28.21Immunization not carried out because of patient refusal
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- V6406Approximate match
Associated MS-DRGs
Z28.21 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.