Z28.3 Underimmunization status
Non-billable header ICD10CM Release FY2026
Version history
| Release | Valid from | Valid to | Description | Billable |
|---|---|---|---|---|
| FY2026 | 2025-10-01 | current | Underimmunization status | no |
Related codes in Z28
- Z28 Immunization not carried out and underimmunization status
- Z28.0 Immunization not carried out because of contraindication
- Z28.01 Immunization not carried out because of acute illness of patient
- Z28.02 Immunization not carried out because of chronic illness or condition of patient
- Z28.03 Immunization not carried out because of immune compromised state of patient
- Z28.04 Immunization not carried out because of patient allergy to vaccine or component
- Z28.09 Immunization not carried out because of other contraindication
- Z28.1 Immunization not carried out because of patient decision for reasons of belief or group pressure
- Z28.2 Immunization not carried out because of patient decision for other and unspecified reason
- Z28.20 Immunization not carried out because of patient decision for unspecified reason
- Z28.21 Immunization not carried out because of patient refusal
- Z28.29 Immunization not carried out because of patient decision for other reason
- Z28.31 Underimmunization for COVID-19 status
- Z28.310 Unvaccinated for COVID-19
- Z28.311 Partially vaccinated for COVID-19
- Z28.39 Other underimmunization status
- Z28.8 Immunization not carried out for other reason
- Z28.81 Immunization not carried out due to patient having had the disease
- Z28.82 Immunization not carried out because of caregiver refusal
- Z28.83 Immunization not carried out due to unavailability of vaccine