MCMedicalCodingSoftware
Z28.39

Z28.39: Other underimmunization status

Billable / specific codeICD-10-CMPOA exempt

Z28.39 is a billable, specific ICD-10-CM code for other underimmunization status. It is valid for submission on a claim.

Check Z28.39 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Delinquent immunization status
  • Lapsed immunization schedule status

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Alphabetic index entries that lead here

  • Delinquent immunization status
  • Lapsed immunization schedule status
  • Underimmunization status
  • Status›delinquent immunization
  • Status›lapsed immunization schedule
  • Status›underimmunization

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under Z28.3

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.