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Z28 Immunization not carried out and underimmunization status

BackZ28.0Immunization not carried out because of contraindication5 →Z28.01Immunization not carried out because of acute illness of patientZ28.02Immunization not carried out because of chronic illness or condition of patientZ28.03Immunization not carried out because of immune compromised state of patientZ28.04Immunization not carried out because of patient allergy to vaccine or componentZ28.09Immunization not carried out because of other contraindicationZ28.1Immunization not carried out because of patient decision for reasons of belief or group pressureZ28.2Immunization not carried out because of patient decision for other and unspecified reason3 →Z28.20Immunization not carried out because of patient decision for unspecified reasonZ28.21Immunization not carried out because of patient refusalZ28.29Immunization not carried out because of patient decision for other reasonZ28.3Underimmunization status2 →Z28.31Underimmunization for COVID-19 status2 →Z28.310Unvaccinated for COVID-19Z28.311Partially vaccinated for COVID-19Z28.39Other underimmunization statusZ28.8Immunization not carried out for other reason4 →Z28.81Immunization not carried out due to patient having had the diseaseZ28.82Immunization not carried out because of caregiver refusalZ28.83Immunization not carried out due to unavailability of vaccineZ28.89Immunization not carried out for other reasonZ28.9Immunization not carried out for unspecified reason
Category
Z28
Immunization not carried out and underimmunization status
INCLUDES
vaccination not carried out
CODING RULE
Code also: , if applicable, encounter for immunization safety counseling (Z71.85)
Chapter
XXI · Factors influencing health status and contact with health services
Section
Z20-Z29
Valid from
Source

CMS ICD-10-CM Tabular List, edition FY2026.

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