Immunization not carried out and underimmunization status (Z28)
Browse all the diagnosis codes used for immunization not carried out and underimmunization status (z28). For easy navigation, the diagnosis codes are sorted in alphabetical order and grouped by sections. Each section is clearly marked with its description, and the corresponding three-digit code range. This format makes it simple to browse diagnosis codes in this chapter or section and find what you're looking for. We've also added green checkmark icons to label billable codes, and red warning icons for non-billable ones. This makes it easy to identify which codes can be billed.
Instructional Notations
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- vaccination not carried out
Code Also
A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
- , if applicable, encounter for immunization safety counseling Z71.85
Factors influencing health status and contact with health services (Z00–Z99)
Persons with potential health hazards related to communicable diseases (Z20-Z29)
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
Z28.3 Underimmunization status
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
- Z28.89 Immunization not carried out for other reason
- Z28.9 Immunization not carried out for unspecified reason
Immunization not carried out and underimmunization status (Z28)