Underimmunization status

**Use additional code:** - code, if applicable, to identify: - immunization not carried out because of contraindication (Z28.0-) - immunization not carried out because of patient decision for other and unspecified reason (Z28.2-) - immunization not carried out because of patient decision for reasons of belief or group pressure (Z28.1) - immunization not carried out for other reason (Z28.8-)