Z28.311 Description: Partially vaccinated for COVID-19 ↓
Z28.31 Description: Underimmunization for COVID-19 status Notes:
These codes should not be used for individuals who are not eligible for the COVID-19 vaccines, as determined by the healthcare provider.
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Z28.3 Description: 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-)
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Z28 Description: Immunization not carried out and underimmunization status Include:
vaccination not carried out
Code Also: [', if applicable, encounter for immunization safety counseling (Z71.85)'] ↓
Z20-Z29 Description: Persons with potential health hazards related to communicable diseases (Z20-Z29) ↓
Z00-Z99 Description: Factors influencing health status and contact with health services Notes:
Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
(a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
(b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.