Is Z28.311 a billable code?
Yes. Z28.311 is a billable ICD-10-CM code and can be used on claims and superbills for dates of service from October 1, 2026 to September 30, 2027.
ICD-10-CM FY2027 diagnosis code
Z28.311: Partially vaccinated for COVID-19
Billable codeValid for dates of service October 1, 2026 to September 30, 2027
Z28.311 is a billable ICD-10-CM diagnosis code for partially vaccinated for covid-19. It is specific enough to use on an insurance claim, a superbill or a Good Faith Estimate.
Superbill GeneratorStart a superbill with Z28.311 already added.Good Faith EstimateStart a cost estimate with Z28.311 already added.CMS-1500 Claim FormFill a claim form with Z28.311 in box 21.
Other codes in Z28.31 Underimmunization for COVID-19 status
Z28.311 questions
What does Z28.311 mean?
Z28.311 is the ICD-10-CM code for Partially vaccinated for COVID-19. It is in chapter 22, Factors influencing health status and contact with health services (Z00-Z99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.