Z28.31
Z28.31: Underimmunization for COVID-19 status
Non-billable headerICD-10-CM
Z28.31 is a non-billable header ICD-10-CM code for underimmunization for covid-19 status. It cannot be billed on its own: choose one of the more specific child codes below.
Notes
Additional guidance from the ICD-10-CM tabular list.
- These codes should not be used for individuals who are not eligible for the COVID-19 vaccines, as determined by the healthcare provider.
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead Z28.31
2 child codes. Green means billable.