Is Z28.311 a billable ICD-10-CM code?

Yes. Z28.311 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does Z28.311 sit in the tabular list?

Factors influencing health status and contact with health services (Z00-Z99), in the block Persons with potential health hazards related to communicable diseases (Z20-Z29).

Z28.311

Z28.311 — Partially vaccinated for COVID-19

Billable / specific codeICD-10-CMPOA exempt

Z28.311 is a billable, specific ICD-10-CM code for partially vaccinated for covid-19. It is valid for submission on a claim.

Risk adjustment

Z28.311 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

How Z28.311 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to Z28.311.

COVID-19›partially vaccinated(for)
Immunization›partial›for COVID-19
Underimmunization status›COVID-19›partially vaccinated(for)
Vaccination›partial›for COVID-19
Status›underimmunization›COVID-19›partially vaccinated(for)

Related codes at this level

Codes that share Z28.31. If Z28.311 is not quite right, the correct code is usually one of these.

Z28.310Unvaccinated for COVID-19

Questions about Z28.311

Is Z28.311 a billable ICD-10-CM code?: Yes. Z28.311 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does Z28.311 sit in the tabular list?: Factors influencing health status and contact with health services (Z00-Z99), in the block Persons with potential health hazards related to communicable diseases (Z20-Z29).