Z28.311
Partially vaccinated for COVID-19
Billable FY2026 2025-10-01 → 2026-09-30
Instructional notes 10
Z28code
Includes
- vaccination not carried out
Code also
- , if applicable, encounter for immunization safety counseling (Z71.85)Z71.85
Z28.3code
Use additional code
- code, if applicable, to identify:
- immunization not carried out because of contraindication (Z28.0-)Z28.0-
- immunization not carried out because of patient decision for other and unspecified reason (Z28.2-)Z28.2-
- immunization not carried out because of patient decision for reasons of belief or group pressure (Z28.1)Z28.1
- immunization not carried out for other reason (Z28.8-)Z28.8-
Z00-Z99chapter
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:Z00-Z99A00-Y89
- (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.
Index entries leading here 6
- COVID-19 U07.1
- partially vaccinated (for) Z28.311
- Delinquent immunization status Z28.39
- COVID-19 Z28.31
- Underimmunization status Z28.39
- Status (post) — see also Presence (of)
- Immunization — see also Vaccination
- partial — see also Underimmunization status
- for COVID-19 Z28.311
- partial — see also Underimmunization status
- Vaccination (prophylactic)
- partial — see also Underimmunization status
- for COVID-19 Z28.311
- partial — see also Underimmunization status
Alongside this code 1 same parent — Z28.31
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.