Z28

Non-Billable

Immunization not carried out and underimmunization status

Z28 should not be used for reimbursement purposes as there are multiple sub-diagnoses that fall under this code. Please refer to the sub-diagnoses below.

Related Diagnoses

  • Z28.0Immunization not carried out because of contraindication
    • Z28.01Immunization not carried out because of acute illness of patient
    • Z28.02Immunization not carried out because of chronic illness or condition of patient
    • Z28.03Immunization not carried out because of immune compromised state of patient
    • Z28.04Immunization not carried out because of patient allergy to vaccine or component
    • Z28.09Immunization not carried out because of other contraindication
  • Z28.1Immunization not carried out because of patient decision for reasons of belief or group pressure
  • Z28.2Immunization not carried out because of patient decision for other and unspecified reason
    • Z28.20Immunization not carried out because of patient decision for unspecified reason
    • Z28.21Immunization not carried out because of patient refusal
    • Z28.29Immunization not carried out because of patient decision for other reason
  • Z28.3Underimmunization status
    • Z28.31Underimmunization for COVID-19 status
      • Z28.310Unvaccinated for COVID-19
      • Z28.311Partially vaccinated for COVID-19
    • Z28.39Other underimmunization status
  • Z28.8Immunization not carried out for other reason
    • Z28.81Immunization not carried out due to patient having had the disease
    • Z28.82Immunization not carried out because of caregiver refusal
    • Z28.83Immunization not carried out due to unavailability of vaccine
    • Z28.89Immunization not carried out for other reason
  • Z28.9Immunization not carried out for unspecified reason
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